Chrysopilus tomentosus Bigot 1887

Chrysopilus tomentosus Bigot
1887. Ckrysopila tomentosa Bigot, Bull. Soc. Zool. France, xu, p. 104.
1909. Chrysopilus tomentosus Kertesz, Cat. Dipt., Ill, p. 327.
Blackish ; palpi long, and with dense long, black hairs as has also the first antennal segment; mesonotum and abdomen more or less golden tomentose; halteres, femora and tarsi blackish; tibiae brownish yellow; wings strongly tinged with brownish, stigma dark brown.
Male. — Length, 5 to 6 mm. Head : Face grayish pollinose, bare on sides; antennae black, first segment noticeably larger than the other two and clothed all over with long, dense, black hairs; palpi long, reaching at least to base of antennae, black, with dense, long black hairs; proboscis blackish with a few short dark hairs; ocellar tubercle black, with long black hairs; cheeks also with rather numerous long black hairs.
Thorax: Mesonotum and scutellum dark brownish to blackish, clothed with fairly abundant, long, erect black hairs and with more or less appressed golden tomentum; pleura gray pollinose, a tuft of long black hairs on mesopleura and a similar tuft, often with a few pale hairs intermixed, on metapleura just in front of halteres; metanotum grayish pollinose, bare; halteres wholly blackish.
Abdomen: Blackish, often somewhat brownish or grayish pollinose, with sparse long pale hairs, especially on sides and with more or less appressed golden tomentum.
Legs: Coxae grayish pollinose, with long black hairs, which however are sometimes intermixed with pale ones; femora dark brownish to blackish, with a few pale hairs and some appressed yellowish tomentum; tibiae and metatarsi brownish yellow except on tip, remainder of tarsi dark brownish.
Wings: Strongly tinged with brownish, especially along front border; veins dark brown; stigma distinct, elongate, dark brown.
Female. — Bigot, in describing this species makes no distinction between the two sexes.
I have seen no females except the one noted from Seattle, Washington, which would agree with his description of the male and which therefore seemed to be referable to this species. This was apparently determined by Melander, and unfortunately, I did not make a comparison of it with the male.
Specimens Examined: 49 ; 48 males, 1 female.
Washington: i c?, Glenwood, Klikitat River, June 27, 1917, (A. L. Melander), [Melander]. 4 d Forks, Clalam County, July 3 to 4, 1920, (E. P. Van Duzee), [Cal. Acad. Sci.]. 1 d Seattle, June 19, 1920, [Cal. Acad. Sci.]. 1 d 1 9 , Seattle, [Univ. Wash.]. 1 o Ephrata, Grand Coulee, June 26, 1902, [Wash. State College].
Oregon: 2 d Hood River, June 30, 1917, (A. L. Melander), [Melander]; 2 d June 2, 16, 191 7, (F. R. Cole), [Cole].
California: i c? , Berkeley, May 8 to 24, 1915, (M. C. Van Duzee), [Van Duzee]. 3 d Berkeley Hills, April 20, 1908, (E. T. Cresson, Jr.), [A. N. S. P.]. 2 <?, Pacific Grove, May 7 to 8, 1906, (J. M. Aldrich), [U. S. N. M.]; 2 <?, May 8, 1906, [U. S. N. M., ex Aldrich]. 1 d San Francisco, May 12, 1915, (M. C. Van Duzee), [Van Duzee]; 1 d (Holbel), [M. C. Z.]. 2 d Los Cerritos, April 3, 1915, [Van Duzee]. 1 d Stanford University, April 30, 1898, [Cole]; 2 <?, April 30, 1910, [Cole]. 1 d Palo Alto, May 11, 1895, (R. W. Doane), [Cole]. 1 d San Diego, [Cole]. Blue Lake, Humboldt County, June 20 to 27, 1907, (J. C. Bradley), [C. U.]. 4 d Felton, Santa Cruz Mountains, 300 to 500 feet alt., (J. C. Bradley), [C. U.]. 1 o Monterey Co., July 2, 1896, W. M. Wheeler, [A. M. N. H.]. 1 d Webber Lake, July 24, (Osten Sacken), [M. C. Z.]. 1 d Half Moon Bay, April 12, 1920, (E. P. Van Duzee), [Cal Acad. Sci.]. 1 d Bryson, Monterey County, May 20, 1920, (E. P. Van Duzee), [Cal. Acad. Sci.]. 1 d Santa Barbara County, and 1 d Santa Clara County, [U. S. N. M., ex Coquillett].
Idaho: 2 d Bellevue, June 25; 2 d Albion, [all U. S. N. M., ex Aldrich].
I believe that I have been correct in referring Western males, with long black hairs on the first antennal segment and on the palpi, to this species. All specimens I have seen, seem to agree well enough with Bigot's description. The golden tomentum of the mesonotum and abdomen is often badly rubbed.

Chrysopilus tomentosus is a species of snipe flies in the family Rhagionidae.