AQUATIC INSECTS IN NHW YORK STATE 499^ 



12 Anal end of the larva with its prolegs. x50 



13 Dorsal aspect of the male g'enitalia. xoO 



14 Foot of middle leg of female 



15 Wiug of male. C Costa. Sc Subcosta. R Radius. M Media. Cu 



Cubitus 



PliATE 51 



Sialis infumata 



1 and 2 Eggs 



3 Lateral filaments of the lai-va (photomicrographs). 



PLATE 53 



Corydalinae 

 Images and eggs 

 IChauliodes serricornis $ . Natural size 



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

 SNeuromus pallidus^. One-sixth enlarged 



LIST OF TEXT FIGURESi PAGE; 



1 Wings of C a 1 1 i b a e t i s s k o k i a n a 215 



2 Abdominal appendages of male Callibaetis skokiaua.... 21& 



3 Nymph of Calopteryx mac u lata 221 



4 Antenna and gills and end of abdomen of nymph of H e t a e r 1 n a 



americana 227 



5 Male abdominal appendages of Hetaerina. aH. americana. 



6 H. tricolor 228 



6 Eggs of Lestes uncata 230 



7 Nymph of Lestes rectangularis 231 



8 Fore wing ofArgia fumipennis, with a portion of hind 



wing 238 



9 Outline of head of nj^mph of A r g i a a p i c a 1 i s , dorsal view. . 231) 



10 Nymph ofEnallagma signatum. a Lateral view of gill 



plate 252 



11 Abdominal appendages of male Enallagma durum 253 



12 Comparative drawnng of labia of Enallagma signatum. 



(a and b) and I s c h n u r a v e r t i c a 1 i s (c and d), with lateral 

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



13 Eggs of Ischnura verticalis 25U 



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



15 Labium of the nymph of Cordulegaster sayi 2U8 



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 Sympetrum corruptum 272 



IS Anal gills or larva of Epiphragma fascipennis 283 



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



20 Eggs of Sialididae 444 



21 Larva of Sialis infumata. x3 445 



22 Pupa of Sialis infumata. x3 447 



23 Fore wing of Sialis infumata. x4 447 



24 Fore wing of Chauliodes. x3 453 



25 Fore wing of N e u r o m u s p a 1 1 i d u s. x2 405 



26 Fore wing of Corydalis cor nut a. x2 471 



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

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

 Book Co. 



