AQUATIC INSECTS IN NEW YORK STATE 499> 



12 Anal end of the larva with its prolegs. x50 



13 Dorsal aspect of the male genitalia. xoO 



14 Foot of middle leg of female 



15 Wing of male. C Costa. Sc Subcosta. B. Radius. M Media. Cu 



Cubitus 



PLATE 51 



Sialis infumata 



1 and 2 Eggs 



3 Lateral filaments of the larva (photomicrographs). 



PLATE 53 



Corydalinae 

 Imagos and eggs 

 IChauliodes serricornis 5. Natural size 



2 Eggs of C h a u 1 1 o d e s sp. ? Enlarged 

 3Neuromus pallidus5. One-sixth enlarged 



LIST OF TEXT FIGURES^ PAGE: 



1 Wings of C a 1 1 i b a e t i s s k o k i a n a -15 



2 Abdominal appendages of male Callibaetis skokiana 216 



3 Nymph of C a 1 o p t e r y x m a c u 1 a t a 221 



4 Antenna and gills and end of abdomen of nymph of H e ta e r i n a 



a m e r i c a n a '^'^^ 



5 Male abdominal appendages of Hetaerina. a H. americana. 



& H. tricolor ^28 



6 Eggs of Lestes uncata '^'^ 



7 Nymph of Lestes rectangular! s 231 



8 Pore wing of A r g i a f u m i p e n n i s , with a portion of hind 



wing 238 



9 Outline of head of nymph of A r g 1 a a p 1 e a 1 i s , dorsal view. . 239- 



10 Nymph of Enallagma signatum. a Lateral view of gill 



plate 252 



11 Abdominal appendages of male Enallagma durum 253 



12 Comparative drawing of labia of Enallagma signatum. 



(a and b) and Ischnura verticalis (c and d), with lateral 

 lobe of each detached and flattened out, and viewed from within. 259- 



13 Eggs of Ischnura verticalis.... 259 



14 Labium of the nymph of Gomphus dilatatus 2<)6 



1.1 Labium of the nymph of Cordulegaster sayi 208 



10 End of abdomen of the nymph of S y m p e t r u m c o r r u p t u m 271 



17 Labium of the nymph of S y m p e t r u m c o r r u p t u m 272 



18 Anal gills or larva of E p i p h r a g m a f a s c i p e n n i s 283 



19 Ventral aspect of head of unknown Tipulid larva from spring 285 



2C^Bggs of Slalididae 444 



21 Larva of Sialis infumata. x3 445 



22 I'upa of Sialis infumata. x3 447 



23 Fore wing of Sialis infumata. x4 447 



24 Pore wing of Chauliodes. x3 4.")3 



25 Fore wing of N e u r o m u s p a 1 1 i d u s. x2 4G5 



20 Fore wing of C o r y d a 1 i s c o r n u t a. x2 471 



'Electros from Needham's Out-door FItudiefi for plate 16, fig. 6, plate 17, fig. 3 and 5 and 

 text figures 3 and 7 have been kindly loaned for use in this report by the American 

 Book Co. 



