MAY FLIES AND JUDGES OF NEW YORK 331 



LEGENBA TO TEXT FIGURES 



Fi?. 1 Venation of the wings of S i p h 1 n r u s ; lettering explained in text, 

 p. 20 



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



Fig. .3 Venation of the 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 palptis 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.36 



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 B 1 a s t u r u s c u p i d u s Say ; 

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

 7th segment. p.41 



Fig. S Venation 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 ?Caenis 

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



Fig. 10 Ventral view of male abdominal appendages of E c d y u r u s 

 m a c u 1 1 i p e u n i s Walsh, imago ; f, forceps ; i, inner appen- 

 dages, p.ol 



Fig. 11 Tarsal claws of nymphs of H e p t a g e n i n a e ; w, of II e p t a - 

 g e n i a i n t e r p u n c t a t a Say ; x, of R h i t h r o g e n a e 1 e - 

 g a n t u 1 a Etn. ? ; y, of I r o n 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.52 



Fig. 12 Labra of nymphs of H e p t a g en 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 inter punctata Say. p..'i2 



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

 gena elegantula F]tn. ?; 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 Heptageninae; m, of Iron sp? 

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

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

 p, of Ecdyurus maculipennis 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 ; O r t h o t r i c h i a a m e r i c a n a ( ?) ; 4."), 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 

 k n a b i . xlSO. p.SOG 



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

 k nabi. xlSO. p.306 



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



