provided by Memoirs of the American Entomological Society
Aeshna (Hesperaeschna) cornigera comigera Brauer 1865 Aeshna (H.) psilus Calvert 1947. .? spine of anterior lamina, in fig. 2 rudimentary. /; meso-posterior angle of hamular process.
Wings variable in coloring: (a) not colored, or (b) very faintly yellow at extreme base (Juan Vinas ) ; or (c) very* pale yellow along costal margin to nodus (R. Jotun Yacu, Ec.) ; or (d) faintly milky througbout (Colonia de Perene) ; or (e) faintly smoky throughout (id., El Fiscal, Guat.) ; or (f) faintly smoky throughout and with each anteand each post-nodal margined with obscure yellowish (J. Vihas, La Merced, Ec, Col. Perene, Peru), or (g) only the antenodals so margined (Satipo, Peru) ; or (h) pale smoky in the apical half, especially along the hind margin (Lake Chapala). Stigma burnt siena above, cadmium yellow below, or cadmium yellow above, paler below, or brown ochre, paler below. Membranule grayish brown, narrowly whitish along vein A.
2. Differs from the male as follows: The female from Guadalajara, partly faded, abd. seg. 2 compared with fig. 416, pi. XXXI, apparently lacks an anterior arm from the pale antero-lateral spot (AL), the posterior arm is unbroken, the postero-dorsal (PD) and postero-lateral (PL) are barely separated, PL and the medio-lateral (ML) are partly separated on the ventral edge, ML is confluent with AL below the ventral end of the transverse median carina, the ventral spots are ill-defined. Ovipositor reaching caudad to beyond the level of the hind end of the inflexed tergum of abd. seg. 9, genital valves reaching almost to that level, lateral genital plates to slightly less than half that level ; hind margin of basal plate of ovipositor convex. Wings variable, colored like a, of the male, or pale yellow at base to triangles, elsewhere uncolored (Guadalajara Turrialba. S. Jose), or like b of the male (S. Jose), or like e of the male (San Diego).
Dimensions. — Abdomen (excl. apps.) 8 36.5-41 mm., 9 41-43, hind wing 8 35-41, 9 40-43, sup. apps. 8 4.90-5.90, 9 7.28-8.26, pterostigma, front wing, costal edge 8 2.21-2.62, 9 2.78-3.03 mm. Front wings with 16-19 antenodals, 10-12 postnodals, hind wings with 9-11 antenodals, 11-14 postnodals.
Living colors. — The following notes, presumably by Mr. J. H. Williamson, are on envelopes of specimens taken in Mexico by him. Tepic, Nov. 5, 1923, 8 "blue below at tip of abdomen"; San Diego Rancho, Nov. 12, 1923, $ " eyes brown and gray and blue, face blue, thorax brown with green stripes, abdomen black on top with green on 1, blue on 2, green dots on 3-9, blue on 10, blue beneath on last ]/z of 9 and 10, blue marks on 2, 3, 7 and 8, others (4-6) green marks; San Diego Rancho Nov. 13, 1923, 2 8, "face, thoracic stripes and abdominal spots blue."
The following notes were made by the writer on the living colors of the holotype male of Cachi, March 10, 1910: eyes green above with two transverse dark brown stripes, lower half paler brownish-green anteriorly, posteriorly bright blue ; three horizontal rows of blackish pseudopupillae ; labium, posterior small spot, the pale markings of the posterior dorsal half of abd. seg. 2, a spot immediately above each auricle and the inferior lateral margin of the same segment bright blue ; all the other pale markings of the body green, including the antehumeral (3 mm. long, .8 mm. wide), mesepimeral (1 mm. wide) and metepimeral (1 mm. wide) stripes, markings on the anterior dorsal half of abd. seg. 2, on segs. 1, 3-10 (except that there is a blue anterior lateral spot on 3 margined with green).
Ecology. — The following notes are by Mr. J. H. Williamson on Mexican examples caught by him: Tepic 8, Nov. 5, 1923, "caught circling the walled-in spring " ; San Diego Rancho 2 8 , Nov. 13, 1923, " nosing around in dusk in mud-bottom creek where foliage was thickest " ; region of Lake Chapala 2 8, Dec. 5, 1923, "caught nosing along banks of big pools where shade was thickest at all hours from 11 A. M. till 3.30 P. M." By the same collector in Peru are these:
- bibliographic citation
- Calvert, P.P. 1956. The Neotropical Species of the Subgenus Aeschna Sensu Selysii 1883 (Odonata). Memoirs of the American Entomological Society vol. 15. Philadelphia, USA