STAUROPHLEBIA.—ASHNA. 179 
triangle: front wings, 7-8-celled, two cells on the proximal side; hind wings, 6—8-celled, two cells on 
the proximal side. Internal triangle 2-celled on all wings. Submedian cross-veins, other than those 
taking part in the internal triangle: front wings 6, hind 4, Supratriangulars: front wings, 8-9; hind, 
6-7. Anal triangle 3-celled. Abdomen (excl. apps.) ¢ 70, apps. ¢ 6-6'5; hind wing, ¢ , 64-66°5 ; costal 
edge of pterostigma, front wing, 3°5-4 mm. 
Hab. Honpuras [1 ¢]; Nicaragua, Escondido River+; Panama, Chiriqui [1 ¢ | 
(coll. P P. C., ex coll. R. Martin).—Venezvurta, Puerto Cabello®; Gurana®; SuRinaM!'; 
Brazit? 8, Amazon 9, Para 9. 
JESHNA. 
Aishna, Fabr. Syst. Ent. p. 424 (1775)*; Cuvier, Tableau Elém. Hist. Nat. Anim. p. 475 
(1798) *. 
Aischna, Kirby, Cat. Odon. p. 86 (1890)*; Karsch, Ent. Nachr. xvii. pp. 283, 288 (1891) *; 
Needham, Canad. Ent. xxix. p. 165, footnote (1897) °; Bull. 47, N. Y. St. Mus. pp. 463, 464 
(1901) °; Williamson, Ent. News, xiv. pp. 5-7 (1908) ”. 
Corypheschna, Williamson, |. c. pp. 2 et seg. (1908) *. 
It does not seem necessary to repeat the references given by Mr. Kirby ® for this 
cosmopolitan genus. 
Synopsis of the Species of Mexico and Central America. 
(The superior appendages of the males are the most important specific characters.) 
§ I. Subuodal sector forking proximal to the level of the pterostigma, with 
three or more rows of cells between the fork at the level of the distal 
end of the pterostigma ; proximal side of the discoidal triangle of the 
hind wings more than half as long as the posterior side (in the following 
species); males with the anal triangle 3-celled. 
A. Abdominal segment 1 with a well-developed ventral tubercle, whose 
surface is spinulose ; tibize black. Males with a median dorsal tooth 
or carina on abd. seg. 10. 
B. Stem of the T-spot on the frons of nearly equal width throughout, 
body less robust (max. width of thorax 6-7 mm., of abd. seg. 2 
35-45 mm. ¢, 4°5-5 mm. ?, of abdomen posterior to segment 3 
2'5 mm.), abdomen widening gradually behind the constriction at 
segment 3; superior appendages of the male with no subbasal 
inferior tubercle, no inferior spine, the superior carina moderate, 
not angulate, the extreme apex abruptly curved downward. Abd. 
(excl. apps.), ¢ 37-43, 9 40-47; apps., f 5°5, 2 4-48 ; hind wing, 
3 88-44, ? 38-48; costal edge of pterostigma, front wing, 2-3°5mm. 1. cornigera. 
BB. Stem of the T-spot on the frons about twice as wide at its hind end 
as at its front end, body more robust (max. width of thorax 7-8 mm., 
of abd. seg. 25°5 mm. 3g, 5°5-6 mm. ?, of abdomen posterior to 
segment 3 25-3 mm.), abdomen widening abruptly behind the 
constriction at segment 3. 
2a2 
