. é AQUATIC INSECTS IN NEW YORK STATE. 467 
dd Front wings not spotted with dark; 
cross veins dark or not; metathorax 
not marked with black or brown 
e Cross veins of fore wings more or less 
darkened (brown or black) 
f Dark markings on prothorax dis- 
tinct; media of fore wings with 
six branches; cross veins between 
all branches of radius, 25 to 30.. 5 corripiens 
ff Dark markings on prothorax indis- 
tinct; media of fore wings with 
38 (?) branches; cross veins be- 
tween all branches of radius, 10 
Ce) LPs ey Ree ee ee Ra acer ‘ 6 winthemi 
ee Cross veins of fore wings not darkened Tpallidus 
DESCRIPTION AND GEOGRAPHIC RANGE OF SPECIES 
1 N. soror Hagen 
1861 Corydalis soror Hagen, Synopsis Neur. N. Am. p.193 
General color luteous; mandibles brown; cheeks with alate 
bidentate process; head broad, not depressed, a brownish stripe 
each side; prothorax narrower than head, longer than broad, 
each side with a brownish border; legs lurid with knees and apex 
of tarsi obscurer; antennae short, slender, black, the two basal 
segments yellowish; appendages of male four, superior ones 
forcipated, clavate at apex; inferior ones cylindric, extremely 
short; wings luteo-subhyaline, an obsolete band on the middle 
of front pair, and fuscous spots nearer the apex; veins fuscous, 
luteous on the middle of the costal space; cross veins between 
all branches of radius, about 18 to 21; medius of fore wing 
four branched; Cu, with four to five accessories. Length to tip 
of wings 60 to 75mm; alar expanse 85 to 130mm. 
Mexico, Cordova. 
2 N. cephalotes Rambur 
1842 Corydalis cephalotes Rambur, Hist. Nat. Neur. p.441 
1853 Corydalis cephalotes Walker, Cat. Brit. Mus. Neur. p.208 
1861 Corydalis «.ffinis Hagen, Synopsis Neur. N. Am. p.d821 
(nomen nudum) 
1866 Corydalis hecate McLachlan, Jour. of Ent, 2:499, pl.20 
Color of body dark brown, mandibles and mouth parts reddish 
brown; head dark brown, roughened behind but not marked 
