AQUATIC INSECTS IN NEW YORK STATE A7T9 
3 C. cognata Hagen 
1861 Corydalis cognata Hagen, Synopsis Neur. N. Am. p.193 
1892 Corydalis cognata Banks, Am. Ent. Soc. Trans. 19:357 
General color luteous yellow; head large, broad, sides convex, 
marked behind with two punctate ochraceous streaks, and a few 
obsolete points; prothorax almost quadrangular, a little 
narrower than the head, marked behind with a hastate mark 
in the middle and ochraceous points each side; feet and legs 
lurid, apex of tarsi obscurer, claws fuscous; wings yellowish 
hyaline, cross veins dark, front wings with a dark marking on 
base and apex of costal area, R, clouded fuscous, costal cells 
with one white dot, number of dots in other cells several, cross 
veins between all the branches of radius about nine to Ia; 
medius with three branches, Cu,» with three accessories. 
Length to tip of wings 55 to 60 mm; alar expanse 80 to 100 mm. 
New Mexico, Phoenix Ariz. 
4 C. crassicornis McLachlan 
1868 Corydalis crassicornis McLachlan, Linn. Soc. Jour. 9:233, 
pl.g, fig.2 
Body pale brown to yellowish; head very broad, flattened 
above, finely rugose, blackish around the ocelli, front margins 
black, ocelli yellow, head marked behind with three impressed 
reticulated spaces; palpi black; mandibles of male very long, 
- blackish tubercles on inner edges, color same as head but darker 
near the tips; prothorax scarcely longer than broad, hardly 
dilated behind, brownish with front margin blackish, the has- 
tate median mark behind, and raised spaces each side of about 
the same shade as the prothorax; mesothorax and metathorax 
nearly equal in width to each other and to the prothorax or 
slightly narrower than the hind margin of it; legs pale brown, 
tarsi, knees, and parts of the tibiae dark fuscous; antennae as 
long as the body or longer, thick, brown, sutures black, three 
to four terminal joints black, basal joints bulbous, joints beyond 
basal fourth with a short, straight, triangular tooth beneath; 
appendages of male very long, slightly pilose; superior pair 
nearly cylindric at base, tips dilated and truncated but suddenly 
