AQUATIC INSECTS IN NEW YORK STATE 499> 



12 Anal encl of the larva with Its prolegs. x50 



13 Dorsal aspect of the male genitalia. x50 



14 Foot of middle leg of female 



15 Wing of male. G Costa. 8o Subcosta. B. Radius. M Media. Gu- 



Cubitus 



PLATE 51 



Sialis infumata 



1 and 2 Eggs 



3 Lateral filaments of the larva (photomicrographs). 



PI/ATE 52 



Corydalinae 

 Imagos and eggs 

 IChauliodesserricornls $ . Natural size 



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



3 Neuromus pallldus $, . One-sixth enlarged 



IjIST of text FIGURES! PAGH; 



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



2 Abdominal appendages of male Callibaetis skokiana.... 216- 



3 Nymph of Calopteryx maculata 221 



4 Antenna and gills and end of abdomen of nymph of Hetaerina 



americana 227 



5 Male abdominal appendages of Hetaerina. aH. a'mericana. 



6 H. tricolor 228 



6 Eggs of Lestes uncata 230' 



7 Nymph of Lestes rectangularis 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 238 



9 Outline of head of nymph of Argia apicalis, dorsal view. . 239' 



10 Nymp(h ofEnallagma signatum. a Lateral view of gill 



plate 252 



11 Abdominal appendages of male Enallagma durum 253 



12 Comparative drawing of labia of Enallagma •ignatum. 



(a and 6) and ISiChnuira veirticalis (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 2U6. 



15 Labium of the nymph of Cordulegaster sayi 2tJ8 



16 End of abdomen of the nymph of Sympetrum corruptum 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 44T 



24 Fore wing of Chauliodes. x3 453 



25 Fore wing of Neuromus pallidus. x2 405 



26 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 ani 

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

 Book Co. 



