MAY FLIES AND MIDGES OF XEW YORK 331 



LEGENDA TO TEXT FIGURES 



Fig. 1 Venation of the wings of Siphliirus; lettering explained in text, 

 p.20 



Fig. 2 Wings of C a 1 1 i b a e t i s . p.21 



Fig. 3 ^^enation of tlie fore wing of Ephemera, p.22 



Fig. 4 The nymphal labium of Baetisca obesa Say. (The two 

 muscle bands indicated by dotted lines in the basal segment of 

 the left palpus are the same that move the lateral lobe of the 

 dragonfly labium ) . p.SO 



Fig. 5 A m e 1 e t u s 1 u d e n s sp. nov., female subimago ; u, end of abdo- 

 men from below, showing truncate apical lobe of the 9th sternum ; 

 V, fere tibia and tarsus. p.3G 



Fig. 6 Parts of nymph of A m e 1 e t u s 1 u d e n s sp. nov. ; y, maxilla ; 

 z, single gill lamella from one of the middle abdominal segments. 

 p.37 



Fig. 7 Gill lamellae of the nymph of Blast ur us cupidus Say ; 

 e, from the 1st segment ; f, from the 4th segment ; g, from the 

 7th segment. p.41 



Fig. 8 "\'enatiou of wing of ? C a e n i s a 1 1 e c t a sp. nov. p.48 



Fig. 9 Ventral view of male abdominal appendages of ? C a e n i s 

 a 1 1 e c t a sp. nov., imago, p.48 



Fig. 10 A^entral view of male abdominal appendages of Ecdyurus 

 macullipennis Walsh, imago ; f, forceps ; i, inner appen- 

 dages, p.ol 



Fig. 11 Tarsal claws of nymphs of Heptageuinae; w, of Hepta- 

 genia inter punctata Say ;x, ofRhithrogena ele- 

 gant u 1 a Etn.? ; y, of Iron sp? from Coy Glen, Ithaca ; z, of 

 Ecdyurus maculipennis Walsh ; hind claws in each 

 case ; middle ones would be similar ; front ones sometimes 

 different. p.r)2 



Fig. 12 Labra of nymphs of II e p t a g e n i n a e ; h. of Iron sp? 

 from Coy Glen, Ithaca ; i, of Rhithrogena elegantula 

 Etn. ? ; j, of Ecdyurus maculipennis Walsh ; k, of 

 Heptagenia interpunctata Say. p.52 



Fig. 13 Mandibles of nymphs of H e p t a g e n i n a e ; c, of Rhithro- 

 gena elegantula Etn. ? ; d, of Iron sp? from Coy Glen. 

 Ithaca ; e, of Ecdyurus maculipennis Walsh ; f, of 

 Heptagenia interpunctata Say. p.52 



Fig. 14 Maxillae of nymphs of H e p t a g e n i n a e ; m, of Iron sp? 

 from Coy Glen, Ithaca ; n, of Heptagenia interpunc- 

 tata Say; o, of Rhithrogena elegantula Etn.?: 

 p, of Ecdyurus m a c u 1 i p e n n t s Walsh, p.53 



Fig. 15 Hydroptilid structures : A g r a y 1 e a m u 1 1 i p u n c t a t a ; 4^ >. 

 apex of abdomen from beneath ; 41, same from side ; 42, triangu- 

 lar pieces from side; 43, same when much exserted ; 44, ventral 

 lamina ; Orthotrichia americana (?); 45, apex of 

 abdomen from beneath, p.73 



Fig. 16 Ventral aspect of larval mouth parts of M e t r i o c n e m u s 

 knab i. xl80. p.30G 



Fig. 17 Dorsal aspect of caudal end of pupa of M e t r i o c n e lii u s 

 k n a b i . xl80. p.306 



Fig. 18 Mandible and labium ; larva A, x400 ; larva B, xl80. p.309 



