Pelomyia coronata Loew 1866

Pelomyia coronata (Loew)

Rhicnoessa coronata Loew, 1866:185.

Tethina coronata.—Malloch, 1913:147 [generic combination, citation].—Melander, 1913b:297 [key].

Pelomyia coronata.—Hendel, 1917:46 [generic combination, key]; 1934:51 [key], 52 [citation].—Sturtevant, 1923:7–8 [citation, in part].—Curran 1934:330 [figure of wing].—Henning, 1939:82 [figure of male terminalia].—Melander, 1952:193, 212 [revision, figures of male terminalia].—Vockeroth, 1965:726 [Nearctic catalog, noted to be an unworked species complex]; 1987:1076–1077 [figures of head, wing].—Cole, 1969:386 [distribution, discussion].—Foster, 1976b:1 [Neotropical catalog].—Mathis and Munari, 1996:9 [world catalog].

Pelomyia cruciata Hendel, 1934:52.—Melander, 1952:195 [citation].—Vockeroth, 1965:726 [Nearctic catalog].—Mathis and Munari, 1996:9 [world catalog]. [New Synonym.]

DIAGNOSIS.—This species is distinguished from congeners by the following combination of characters: body with brownish gray microtomentum; frons yellowish orange; parafrontal setae few, minute, 1 slightly larger seta near base of antenna; fronto-orbital seta 1, reclinate; antenna mostly brown, only distal margin and entire medial surface of first flagellomere orange; oral vibrissae weak but distinct; gena approximately 0.30–0.35 times eye height; mesonotum with 3 faint brownish stripes along line of dorsocentral setae and on midline; dorsal of anepisternum brownish, ventral with gray microtomentum; acrostichal setulae few, minute, in 2 scattered rows; crossveins in wings not infuscate; tarsomeres of normal size (not unusually short or enlarged); forecoxa white in base color; mid- and hindfemora not swollen, evenly brown to dark gray; setae of anteroventral ctenidial comb short (shorter than width of foretibia), relatively weak, numerous.

DESCRIPTION.—Body length 1.90–3.00 mm; body generally with brown to brownish gray microtomentum.

Head: Ocellar triangle with grayish microtomentum; frons yellowish orange, extreme margins with silvery gray microtomentum; frontal lunule silvery; parafrontal setae few, minute, with 1 slightly larger near base of antenna; ocellar seta 1, strong, another 2 or 3 minute weak ocellar setulae; paravertical setae short, weak, widely separated, and convergent. Antenna mostly brown, only distal margin and entire medial surface of 1st flagellomere orange. Gena approximately 0.30–0.35 times eye height, with whitish yellow microtomentum and many minute, scattered setulae; shiny chitinous stripe along parafacial and peristomal margin; palpus yellow; clypeus brown.

Thorax: Mesonotum mostly with grayish microtomentum, with brown stripe along line of dorsocentral setae and on midline; dorsal of anepisternum with brown microtomentum and ventral with gray microtomentum, remainder of pleural surfaces mostly with gray microtomentum. Wing hyaline; costal section ratios 6.4:1.6:1.0. Forecoxa white in base color, with white microtomentum, with 2 or 3 large setae in addition to a few smaller ones; midcoxa mostly yellow, gray basally; hindcoxa gray; forefemur moderately swollen, with gray microtomentum and bearing a row of 6–8 strong setae on both posterodorsal and posteroventral surfaces, distal 2 or 3 sometimes longest, many scattered smaller setae on remainder of posterior surface, otherwise evenly setulose; forefemoral anteroventral ctenidial comb distinct, shorter than width of foretibia; hindfemur barely swollen; mid- and hindfemora uniformly brown to dark gray, evenly setulose, with anterior surface of midfemur bearing 1 stronger seta in middle; foretibia yellowish on basal , becoming gray distally; mid- and hindtibiae varying from entirely yellowish to gray on distal , tibiae evenly setulose; foretarsus entirely gray, mid- and hindtarsi with basal 3 tarsomeres yellow, distal 2 tarsomeres brown.

Abdomen: With microtomentum brownish dorsally, becoming gray laterally, extreme posterior margin of each tergite yellow. Male terminalia (Figures 1–4, 8): ventral lobe of epandrium narrowed ventrally, anterior margin bare, posterior margin with several setulae; surstylus short, spatulate, with a few fine setulae; aedeagus thick, pubescent, with pair of large basal lobes; pregonites distinct, long, tapered, pointed, partly fused with postgonites distally; hypandrium in lateral view narrow; distal portion of postgonite long, tapered, pointed; basiphallus long, pointed, triangular; ejaculatory apodeme moderately flared. Female terminalia: cercus bearing fine setulae only (Figures 9, 10); spermatheca as in Figure 11.

TYPE MATERIAL.—The holotype female of Rhicnoessa coronata Loew is labeled “Georgia [green; handwritten]/Loew Coll./coronata m. [handwritten]/Rhicnoessa [handwritten]/Type 13445 [red label; number handwritten]/Holo-type [round label with red margin]/Holotype Rhicnoessa coronata Loew A. Irwin 1982 [handwritten].” The holotype is pinned directly, is in good condition (abdomen removed, dissected, and preserved in a microvial that is on a separate pin), and is deposited in the MCZ (13445).

The lectotype male of Pelomyia cruciata Hendel, herein designated to stabilize and make more universal the use of this name, is labeled “[UNITED STATES] Atherton, M[iss]o[uri. Independence:]. IX–10–15 [10 Sep 1915]/Pelomyia coronata Lw. [handwritten; black submargin]/LECTO-TYPE [round label with a dark blue border]/Lecto-type [round label; handwritten; blue border]/Lectotype Pelomyia cruciata Hendel 1934 Det. A.G. Irwin 1982 [handwritten]/LECTOTYPE Pelomyia cruciata Hendel By Foster & Mathis [all except ‘LECTOTYPE’ and ‘By’ handwritten; black submarginal border].” The lectotype male is double mounted (smaller pin with base wound around main pin), is in good condition (first flagello-meres missing, hole in part of scutellum, some setae misdirected), and is deposited in the NMW. Although Irwin studied this specimen and attached a lectotype label, the designation was never published and is thus invalid. A paralectotype female with the same locality data is herein designated.

OTHER SPECIMENS EXAMINED.—UNITED STATES. Arizona. Cochise: Charleston, 26 Mar 1967, D.M. Wood (1; CNC); Douglas, 1 May 1942, A.L. Melander (1; USNM). Coconino: Littlefield (ex. Salsola pestifer), 15 May 1932, E.W. Davis (1; USNM); Oak Creek, Todd's Lodge, 7–9 May 1950, J.L. Sperry (3; USNM). Graham: Marijilda Canyon (0.9 mi along road from highway 666; 3860 ft), 3 Aug 1965, H.B. Leech (1; CAS). Maricopa: Gila Bend, 9 Apr 1947, A.L. Melander (3; USNM). Pima: Organ Pipe Cactus National Monument, Organ Pipe Park, Alamo Canyon, 16 Apr 1947, A.L. Melander (3; USNM); Organ Pipe Cactus National Monument (on Baileya sp.), 14 Apr 1948, A.L. Melander (1; USNM); Quitobaquito (Organ Pipe Cactus National Monument), 13 Apr 1948, A.L. Melander (2; USNM); Quitobaquito (Organ Pipe Cactus National Monument; 3 mi W), 14 Feb 1970, P.H. Arnaud, Jr. (1; CAS); Sabino Canyon, 27 Apr-5 May 1942, 1948, A.L. Melander (3, 5, USNM); Tucson, Saguara Monument, 10 Apr 1935, A.L. Melander (1; USNM). Pinal: Superior, 13 Apr 1935, A.L. Melander (4 1; USNM). Yavapai: Congress, 23–26 Apr 1967, D.M. Wood (2; CNC). Yuma: Yuma (23 mi N), 2 Apr 1967, D.M. Wood (1; CNC). California. Imperial: Brawley, 7 Apr 1947, A.L. Melander (1; USNM); Salton Sea Beach, 12 Nov 1945, A.L. Melander (1; USNM); Westmoreland, 6 Apr 1949, W.W. Wirth (1; USNM); Inyo: Death Valley Furnace Creek, 23 Apr 1935, A.L. Melander (1, 1; USNM); Lone Pine (S edge), 17 Jun 1962, J. Tomlinson (1; CAS); Panamint Valley, 12 Mar 1941, T. Aiken (8; USNM). Kern: Arvin, 14 Mar 1935, A.L. Melander (1; USNM); Roger Dry Lake, 16 Mar 1935, A.L. Melander (1; USNM). Los Angeles: Big Rock Wash, 12 May 1944, A.L. Melander (2; USNM); Claremont, 23 Jan 1935, A.L. Melander (1; USNM); Green Valley, 26 Jul 1944, A.L. Melander (1; USNM); Los Cerritos, 14 Mar 1915, M.C. VanDuzee (1; CAS); Mojave Desert, Lovejoy Lake, 10 May 1944, A.L. Melander (7, 7; USNM); Valyermo, 13 May 1944, A.L. Melander (2; USNM). Monterey: Asilomar, 4 Aug 1950, A.L. Melander (1; USNM); Pfeiffer, Big Sur State Park, 16 Jun 1949, P.H. Arnaud (1; USNM); Point Lobos, 6 Aug 1969, B. Hocking (1; CNC). Napa: St. Helena, 3 Jun 1909, C. Fuchs (1; USNM). Orange: Buena Park, 19 May–23 Dec 1944, A.L. Melander (5, 3; USNM); Capistrano Hot Springs, 29 Jun 1942, A.L. Melander (1; USNM); Corona del Mar, 25 Mar–29 Jun 1942, 1945, 1946, A.L. Melander (2, 2; USNM); Huntington Beach, 4 Jun 1945, A.L. Melander (1; USNM); Laguna, 23 Jun 1954, A.L. Melander (1; USNM); Laguna Beach, 22 May–18 Aug 1943, 1944, A.L. Melander (2, 1; USNM); Orange (on foliage of lima beans), 31 May 1950, H.H. Keifer (1; USNM); San Clemente, 23 May–18 Oct 1944, A.L. Melander (3, 2; USNM). Riverside: Agua Caliente Indian Reservation (Palm Canyon), 24–27 Feb 1970, P.H. Arnaud, Jr. (1; CAS); Andreas, 23 Mar 1951, A.L. Melander (1; USNM); Andreas Canyon, 17 Mar–22 May 1945, 1951, 1956, 1960, A.L. Melander (13, 4; USNM); Blythe, 1 May 1955, W.R. Richards (2, 1; CNC); Cabazon, 31 Mar 1945, A.L. Melander (1; USNM); Cottonwood Spring, 7 Apr 1949, W.W. Wirth (1; USNM); Elsinore Lake, 25 Jan 1935, A.L. Melander (1; USNM); Hemet Lake (4500 ft), 13 Apr 1961, J.G Chillcott (11, 5; CNC); Herkey Creek Camp, 14 May 1950, A.L. Melander (1; USNM); Hunter's Spring, 10 May 1952 (2; USNM); Indio, 6 Mar–2 May 1945, 1949, 1955, W.R.M. Mason, A.L. Melander, W.R. Richards, R.E. Ryckman (14, 2; CNC, USNM); Joshua Tree National Monument, Live Oak Tank, 22 Apr 1944, A.L. Melander (1; USNM); Keen Camp, 7 Jun 1942, A.L. Melander (4; USNM); La Quinta, 19 Mar–13 Apr 1958, 1962, J.G. Chillcott, A.L. Melander (33, 10; CNC, USNM); Ortega Highway, Mariana River, 19 Oct 1944, A.L. Melander (1; USNM); Ortega Highway, San Juan Camp, 26 May 1944, A.L. Melander (1; USNM); Palm Canyon, 27 Feb–7 Nov 1934, 1935, 1955, A.L. Melander, W.R. Richards (4, 4; CNC, USNM); Palm Desert (2000 ft), 4 Apr 1955, W.R. Richards (1, 1; CNC); Palm Springs, 26 Feb–20 Nov 1935, 1943, W.R.M. Mason, A.L. Melander (20, 11; USNM); Palm Springs (5 mi W), 6 Apr 1949, A.L. Melander (1; USNM); Palm Springs, Smoke Tree Ranch, 6 Apr 1949, A.L. Melander (1; USNM); Rancho Mirage, 6 Apr 1955, W.R.M. Mason (6; CNC); Riverside, 6 Jan-22 Dec 1935, 1940, 1942, 1944, 1950, A.L. Melander (31, 36; USNM); Temecula, 7–27 Jun 1945, 1950, A.L. Melander (2, 1; USNM); Thermal, 14 Mar–9 Apr 1955, W.R. Richards (6, 4; CNC); Thousand Palms, 22 Mar–5 Apr 1955, J.E.H. Martin, W.R. Richards (18, 11; CNC); Thousand Palms, Thousand Palms Oasis, 10 Mar–25 Apr 1955, W.R.M. Mason (16, 5; CNC); Thousand Palms, Willis Palms Oasis, 18 Mar 1955, W.R.M. Mason (3, 1; CNC); White Water, 16 Mar–16 May 1954, 1955, A.L. Melander, W.R. Richards (2, 3; CNC, USNM); White Water, Snow Creek (1500 ft), 16 Mar 1955, W.R. Richards (1, 1; CNC); White Water Canyon, 11 Nov 1944, A.L. Melander (2; USNM). San Bernardino: Apple Valley, 7–8 May 1955, W.R. Richards (1, 1; CNC); Arrowhead Springs, 24 May 1935, A.L. Melander (1; USNM); Baker (14 mi S), 23–24 Apr 1969, R.R. Pinger (1; USNM); Barton Flat, South Fork Camp, 2 Sep 1944, A.L. Melander (1; USNM); Big Bear Lake, 6 Jul 1942, A.L. Melander (3, 1; USNM); Cajon, 9 Aug 1944, A.L. Melander (1, 1; USNM); Camp Angelus, 28 May–2 Jun 1947, A.L. Melander (1, 1; USNM); Crestline, 4 Jul 1942, A.L. Melander (1; USNM); Helendale, 18 May 1955, W.R. Richards (5, 3; CNC); Jenks Lake, 7 Jun 1956, A.L. Melander (1; USNM); Mentone, 13 May 1947, A.L. Melander (2; USNM); Mountain Home, 24 Aug–24 Sep 1944, A.L. Melander (1, 1; USNM); Morongo, 26 Sep 1944, A.L. Melander (1; USNM); Morongo Inn, 10 May 1935, A.L. Melander (1; USNM); Morongo Valley, 19–22 Apr 1944, A.L. Melander (2, 1; USNM); Oak Glen, 7 Jul–19 Sep 1945, 1946, A.L. Melander (2; USNM); Phelas, Sheep Creek Canyon, 9 May 1949, A.L. Melander (1; USNM); Piute Butte (Mojave Desert), 12 May 1944, A.L. Melander (2; USNM); Quail Spring (Joshua Tree National Monument), 5 Oct 1934, A.L. Melander (3, 3; USNM); Redlands, 1913, F.R. Cole (1; USNM); San Bernardino Mountains, South Forks Meadows, 1 Jun 1947, A.L. Melander (1; USNM); Sheep Creek Canyon, 1 May 1946, A.L. Melander (1; USNM); Scotland, 19 Sep 1943, A.L. Melander (7, 1; USNM); South Fork Santa Ana River, 14 Jun–2 Aug 1942, 1945, 1954, A.L. Melander (4, 1; USNM); Stoddard Well, 30 May 1944, A.L. Melander (1, 1; USNM); Thorn, 30 May 1944, A.L. Melander (2; USNM); Twenty-nine Palms, 5 Sep 1946, A.L. Melander (1; USNM); Upper Santa Ana River, 28 Apr–25 Aug 1947, 1950, 1955, 1956, 1958, 1959, A.L. Melander (7, 3; USNM); Verdemont, 28 Jun 1945, A.L. Melander (1; USNM); Victorville, 12–30 May 1944, 1955, W.R.M. Mason, A.L. Melander, W.R. Richards (4, 3; CNC, USNM); Yucca Valley, 5 Oct 1934, A.L. Melander (1; USNM). San Diego: Agua Caliente, 5 Apr 1967, D.M. Wood (1; CNC); Borrego, 5 Apr–5 May 1946, 1949, J.L. Sperry, W.W. Wirth (2; USNM); Cuyamaca Lake (4600 ft), 21 Apr 1955, W.R. Richards (1; CNC); Cuyamaca Park, 6 May 1945, A.L. Melander (2, 1; USNM); La Jolla, 1 Jan–29 Dec 1934, 1935, A.L. Melander (2; USNM); Lake Henshaw, 7 May 1945, A.L. Melander (1; USNM); Oak Grove, 8–9 May to 4 Nov 1945, A.L. Melander (5, 1; USNM); San Diego, 3 Apr–30 Dec 1916, 1934, H.G. Dyer, A.L. Melander (3, 1; USNM). San Francisco: San Francisco, 17 May 1952, C.E. Kaufeldt (1; CAS). San Luis Obispo: Soda Lake (S end; 15 mi SE Simmler), 2 Apr 1969, H.B. Leech (1; CAS). Santa Barbara: Carpinteria, 8 Oct 1946, A.L. Melander (1; USNM). Santa Clara: Stanford, Jul 1915, A.L. Melander (3, 6; USNM). Santa Cruz: Santa Cruz, 9 Aug 1950, A.L. Melander (1; USNM). Sonoma: Bodega Marine Station, 3 May 1968, D.D. Munroe (1; CNC). Sutter: Live Oak Park, 6–7 Jun 1945, A.L. Melander (1, 2; USNM). Colorado. Archuleta: Pagosa Springs (hot springs), 27 May 1969, W.W. Wirth (1; USNM). Boulder: Boulder, Boulder Res. (5000 ft), 30 May 1961, B.H. Poole (1; CNC). Clear Creek: Loveland Pass (W slope; 9850 ft), 28 Jul 1961, B.H. Poole (1, 1; CNC). Eagle: State Bridge near Bond (7000 ft; dry river bed and bank), 24–25 Jun 1961, C.H. Mann (1; CNC). E1 Paso: Manitou Springs, 18 Jun 1940, A.L. Melander (3, 1; USNM). Park: Hartsel, 20 Jun 1940, A.L. Melander (1; USNM). Florida. Hillsborough: St. Petersburg, 28 Mar 1932, A.L. Melander (1; USNM). Marion: Silver Springs, 2 Apr 1932, A.L. Melander (1; USNM). Idaho. Bannock: Lava Hot Springs, 14 Jul 1988, W.N. and D. Mathis (1; USNM). Latah: Kendrick, 7 Jun 1917 (1; USNM). Nez Perce: Lewiston, 26 Jun 1921, A.L. Melander (1; USNM); Lewiston Hill, 31 May 1924, A.L. Melander (2; USNM). Nevada. Clark: Las Vegas, 15 Apr 1932, H.W. Davis (2; USNM); Overton, 3 Nov 1929, D. Fox (1; USNM); Las Vegas Springs (36°10.4′N, 115°11′W), 11 May 2001, D. and W.N. Mathis (12; USNM); Las Vegas Wash (35°05.2′N, 114°58.8′W), 10–11 May 2001, D. and W.N. Mathis (19, 7; USNM); Red Rock Canyon (Calico Basin, Red Spring; 36°08.7′N, 115°25′W), 11 May 2001, D. and W.N. Mathis (17, 1; USNM). Humboldt: Golcanda Summit (E foot; 0.5 mi N highway 40; 4800 fit), 26 Aug 1965, H.B. Leech (2; CAS). Lincoln: Crystal Springs, 21 Jun 1953, A.B. Gurney (1; USNM). Nye: Ash Meadows National Wildlife Refuge (Crystal Spring; 36°25.2′N, 116°19.8′W), 12 May 2001, D. and W.N. Mathis (9; USNM); Ash Meadows National Wildlife Refuge (Peterson Reservoir; 36°26.7′N, 116°21′W), 12 May 2001, D. and W.N. Mathis (7, 1; USNM). New Mexico. Catron: Gila National Forest, Middle Fork Gila River (riparian zone), 29 May 1991, B.J. Sinclair (2; CNC); Glenwood (5 mi E), 24 Jun 1953, W.W. Wirth (1; USNM). Colfax: Cimarron (river margin), 26 May 1969, W.W. Wirth (1; USNM). Dona Ana: Mesilla Park, 5 May 1909, C.N. Ainslie (2; USNM). Otero: High Rolls, 29 May 1902 (1; USNM); Cloudcroft, 26 May 1964, J.F. McAlpine (3, 3; CNC). New York. Schoharie: Sharon Springs, 26 Jun 1934, A.L. Melander (2; USNM). Texas. Brewster: Big Bend National Park, Dugout Wells (3000 ft), 13–22 May 1959, J.F. McAlpine (15, 9; CNC). Galveston: Galveston, Jun 1900 (1; USNM). Jeff Davis: Fort Davis (Limpia Canyon; 5000 ft), 27 Apr-28 May 1959, E. Becker, H. Howden, W.R.M. Mason (2; CNC); Toyavale, 22 Mar 1967, D.M. Wood (1; CNC). Utah. Garfield: Alvey Wash (8.4 km S Escalante; 37°42.3′N, 111°37.6′W; 1880 m), 21 May 2001, D. and W.N. Mathis (3; USNM); Deer Creek (37°51.2′N, 111°21.1′W; 1762 m), 21 May 2001, D. and W.N. Mathis (1; USNM); Willow Tank, Hurricane Wash (37°23.2′N, 111°08′W), 22 May 2001, D. and W.N. Mathis (2; USNM); 40-Mile Spring/Tank (69 km SE Escalante; 37°21′N, 111°4.9′W), 22 May 2001, D. and W.N. Mathis (3; USNM). Kane: Coral Pink Sand Dunes (Moquith Mountain Wilderness; 37°04.6′N, 112°40.7′W), 16 May 2001, D. and W.N. Mathis (1; USNM); Coral Pink Sand Dunes (Sand Spring; 37°04.6′N, 112°39.9′W), 16 May 2001, D. and W.N. Mathis (3; USNM); Coral Pink Sand Dunes (Water Canyon; 37°3′N, 112°40′W), 16 May 2001, D. and W.N. Mathis (1; USNM); Drip Tank Canyon (37°19.4′N, 111°31.8′W), 15 May 2001, D. and W.N. Mathis (5; USNM); East Fork of Virgin River (26.6 km N Knab; 37°12.2′N, 112°41.4′W), 18 May 2001, D. and W.N. Mathis (1; USNM); Kanab, 19 Apr 1935, A.L. Melander (l, 1; USNM); Kanab (6.5 km N; 37°08.7′N, 112°32.4′W), 14 May 2001, D. and W.N. Mathis (3; USNM); Kanab (East Fork Virgin River; 26.6 km N; 37°12.2′N, 112°41.4′W), 18 May 2001, D. and W.N. Mathis (3; USNM); Kanab (Seaman Wash and Spring; 24.5 km E; 37°07′N, 112°15′W), 14 May 2001, D. and W.N. Mathis (2, 1; USNM); Kanab (Sheep Creek; 37°29.7′N, 112°04′W), 17 May 2001, D. and W.N. Mathis (2; USNM); White House Spring (71 km E Knab; 37°04.8′N, 111°53.4′W; 1250 m), 19 May 2001, D. and W.N. Mathis (4; USNM). Sanpete: Moroni, 27 Jun 1940, A.L. Melander (1; USNM). Sevier: Richfield (beet collection; light trap), 28 May–21 Sep 1929, 1930, D. Fox (5; USNM). Utah: Spanish Fork, D.E. Hardy (2; USNM). Washington: St. George (sugar beet seed), 20 Nov 1936, E.W. Davis (1; USNM); Santa Clara (ex. Salsola pestifer), 17 Sep 1929, D. Fox (2; USNM); Zion National Park, 20 Apr 1935, A.L. Melander (3; USNM). Washington. Benton: Kennewick, 22 May 1917, A.L. Melander (1; USNM). Chelan: Lake Chelan, Stehekin, 30 Jul 1919, A.L. Melander (1; USNM); Wenatchee, 4 May–8 Jun 1919, A.L. Melander (2; USNM). Klickitat: Glenwood Road, Klickitat River, 23 Jul 1921, A.L. Melander (3, 1; USNM); Husum, 28 Jun–26 Jul 1917, 1921, A.L. Melander (l, 1; USNM). Spokane: Austin, 19 May 1923, A.L. Melander (1; USNM). Whitman: Almota, 2 Jun 1918, A.L. Melander (1; USNM). Yakima: Hoover, 17 Jul 1921, A.L. Melander(l, 1 (in copula); USNM).

CANADA. Alberta: Lethbridge, 5 Jul 1956, O. Pech (1; CNC). British Columbia: Osoyoos, 8 May 1953, J.R. McGillis (1; CNC); Summerland, 15 Sep 1930, A.A. Dennys (1; CNC). Saskatchewan: Buffalo Pound Provincal Park (ex. Kochia sp.), 6 Aug 1980, M.G Maw (1; CNC); Dilke, 6 Aug 1980 (ex. Artemisia absinthium), M.G Maw (1; CNC); Grenfell, 9 Jul 1980 (ex. Tanacetum vulgare), M.G. Maw (1; USNM); Red Deer Hill, 22 Jul 1980 (ex. Cirsium arvense and Sonchus arvensis), R. Lere (2, 1; CNC); Weyburn (ex. Salsola pestifer), 10 Jul 1980, C. Nichols (1; CNC).

MEXICO. Baja California Norte: Arroyo del Rosario (3 mi above El Rosario), 26 Apr 1963, P.H. Arnaud, Jr., H.B. Leech (2; CAS); La Grulla (Sierra San Pedro Martir; 6900 ft), 12 Jun 1953, P.H. Arnaud, Jr. (2, 6; CAS); Rancho Viejo (Sierra San Pedro Martir; 7000 ft), 13 Jun 1953, P.H. Arnaud, Jr. (2; CAS); Rio Guadalupe (carretera 3), 29 Apr 1963 (1; CAS); San Carlos (Agua Caliente; 18.5 km E Maneadero), 6 Jul 1973, P.H. Arnaud, Jr. (13, 21; CAS); Santo Domingo (5.7 mi E Hamilton Ranch; damsite), 22–25 Apr 1963, P.H. Arnaud, Jr., H.B. Leech (32, 66; CAS); Tijuana (45 km S), 26 Jun 1950, A.L. Melander (3, 8; USNM); Tijuana (60 mi S), 26 Jun 1950, A.L. Melander (1, 1; USNM). Chihuahua: Camargo, 30 May 1964, J.F. McAlpine (1; CNC). Distrito Federal: Contreras, 6 Aug 1965, N.H.L. Krauss (l; USNM). Puebla: Lake Alchichica (2400 m; near San José Alchichica), 24 Feb 1998, A. Freidberg (2, 13; USNM). Sonora: Rocky Point Marsh, 21 Apr 1947, A.L. Melander (2; USNM); Sonoyta, 21 Apr 1947, A.L. Melander (1; USNM).

DISTRIBUTION (Figure 12).—Nearctic: Canada (AL, BC, SK), United States (AZ, CA, CO, FL, ID, MO, NV, NM, NY, TX, UT, WA). Neotropical: Mexico (BCN, CHI, DF, PUE, SON).

VARIATION.—Some variation was noted in the coloration of the legs, particularly the tibiae. Some specimens exhibit entirely yellow mid- and hindtibiae, whereas in others the distal half is pale to dark gray. The holotype of R. coronata has partially yellowish tibiae.

There is also slight variation in the shape of the ventral process of the epandrium in P. coronata. In some specimens the process is narrower distally and may exhibit a slightly greater posterior curvature and relatively more sharpness at the apex.

SIMILAR SPECIES.—The lateral aspect of the thorax in P. coronata is mostly gray with some pale brownish coloration along the dorsal half of the anepisternum. In P. occidentalis, the mesonotal pleurites show a broad, darker brown stripe along the postpronotal, notopleural, and anatergal surfaces. Pelomyia occidentalis generally has a darker appearance than P. coronata.