MAY FLIES AND MIDGES OF NEW YORK 331 



LEGENDA TO TEXT FIGURES 



Fig. 1 Venation of the wings of S i p h 1 u r u s ; lettering explained in text. 

 p.20 



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



Fig. 3 Venation of the fore wing of Ephemera, p.22 



Fig. 4 The nyinphal labinin 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.JJO 



Fig. 5 Ameletus 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, fore tibia and tarsus. p.3G 



Fig. G Parts of nymph of Ameletus 1 u dens 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 Blasturus cupidus Say; 

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

 7th segment, p. U 



Fig. 8 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 ? C a e n i s 

 a I lee t a sp. nov., imago, p.48 



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

 m a cu 1 1 i pen n i s W.-tlsh, imago; f, forceps; i, inner appen- 

 dages, p.ol 



Fig. 1 1 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 Iron sp? from Coy Glen, Ithaca ; /.. <>f 

 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 II e p t a g en i n a e ; h, of Iron sp? 

 from Coy Glen, Ithaca ; i, of Ilhithrogena elegantula 

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

 Ileptagenia interpunctata Say. p.52 



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

 g e n a elegantula Etn. ? ; d, of Iron sp? from Coy Glen. 

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

 H e p t a g e n i a i n t e r p u u c t a t a Say. p.52 



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

 from Coy Glen, Ithaca ; n, of H e p t a g e n i a interpunc- 

 tata Say ; o, of Rhithrogeua elegantula Etu. ? : 

 p, of Ecdyurus maculipennis Walsh, p.53 



Fig. 15 Ilydroptilid structures: A gray lea m u 1 1 i p u n c t a t a ; 4U 

 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 

 k n a b i . xlSO. p.30(J 



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

 knabi. x180. p.306 



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



