AQUATIC INSECTS IN Nb^NY YORK STATE 499> 



12 Anal end of the larva with its prolegs. x50 



13 Dorsal aspect of the male genitalia. x50 



14 Foot of raiddle leg of female 



15 Wing of male. C Costa. Sc Snbcosta. i? Radius. M Media. Cif 



Cubitus 



PLATE 51 



Sialis infumata 



1 and 2 Eggs 



3 Latei-al filaments of the larva (photomicrographs). 



PLATE 53 



Corydalinae 

 Imagos and eggs 

 IChauliodes serricornis S . Natural size 



2 Eggs of C h a u 11 o d e s sp. ? Enlarged 

 SNeuromus pallidus5. One-sixth enlarged 



lilST OP TEXT FIGTJRES1 PAGE; 



1 Wings of C a 1 1 i b a e t i s s k o k i a n a Iil5 



2 Abdominal appendages of male C a 1 1 i b a e 1 1 s s k o k i a u a . . . . 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 t a e r i u a 



americana ^-^ 



5 Male abdominal appendages of Hetaerina. aH. americana. 



b H. tricolor 22S 



6 Eggs of Lestes uncata 230 



7 Nymph of Lestes rectangular is 231 



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



wing -3S 



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



10 Nymph ofEnallagma signatum. a Lateral view of gill 



plate 252 



11 Abdominal appendages of male Enallagma durum 253 



12 Comparative drawing of labia of Enallngma «ignatum. 



(a and h) 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. 25i> 



13 Eggs of Ischnura verticalis 259 



14 Labium of the nymph of G o m p h u s d i 1 a t a t u s 2(J6. 



15 Labium of the nymph of Cordulegaster sayi 2(J8- 



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 corrupt um 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. x?> 453. 



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



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 Studies 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. 



