AQUATIC INSECTS IN NEW YORK STATE 467 



M 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) 

 i Dark markings on prothorax dis- 

 tinct; media of fore wings with 

 six branches; cross veins between 



all branches of radius, 25 to 30.. 5corrlpien» 



/■f Dark markings on prothorax indis- 

 tinct; media of fore wings with 

 3 (?) branches; cross veins be- 

 tween all branches of radius, 10 



to 12 6wlnthemi 



ee Cross veins of fore wings not darkened 7 pallidus 



DESCRIPTION AND aEOGRAPHIC RANGE OE SPECIES 

 1 N. soror Hagen 



1861 Corydalis soror Hagen, Synopsis Neur. N. Am. p.l93 



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 Inrid 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, 

 luiteous on the middle of the costal space; cross veins between 

 all branches of radius, about 18 to 21; medius of fore wing 

 four branched; Cui with four to five accessories. Length to tip 

 of wings 60 to 75mm; alar expanse 85 to 130mm. 

 Mexico, OordO'va. 



2 N. cephalotes Rambur 



1842 Corydalis cephalotes Eambur, Hist. Nat. Neur. p.441 

 1853 Corydalis cephalotes Walker, Cat. Brit. Mus. Neur. p.208 

 1861 Corydalis f,ffinis Hagen, Synopsis Neur. N. Am. p.321 



(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 



