i AQUATIC INSECTS IN NEW YORK STATE 467 



dd Front wings not spotted with dark; 

 cross veins darli or not; metatborax 

 not marlved with blaclv 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 c o r r i p i e n » 



ff Dark markings on prothorax indis- 

 tinct; media of fore wings with 

 3 (?) branches; cross veins be- 

 tween all branches of radius, 10 



to 12 6winthemi 



ee Cross veins of fore wings not darkened 7 p a 11 i d u » 



DESCBIPTION AND GEOGRAPHIC RANGE OE SPECIES 



1 N. soror Ha gen 

 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 cjiindric, 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 :. f f i n i s 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 



