MAY PLIES AND MIL)GF:S OF NEW YORK 189 



aa Labium with an cveu nnmbei* of teotli 



b The two middle teeth much paler in coloi- than the others, pl.22, fig.22 



82. Ohir. sp. 

 bJ) The teeth uniformly dark 



c Middle pair (first laterals) shorter than the second laterals, pl.22, 



fig.24 44. f u 1 V 1 V e n t r 1 s n. sp. 



cc Middle pair as long or longer than the laterals 



d Middle pair (first laterals) noticeably longer than the second 

 laterals 

 c Third laterals longer than the second, pl.22, fig.l 



41. f 1 a V u s n. sp, 

 ec Thii'd laterals about same size as the second; bloodworms, pl.21, 



fig.G 32. nigricans n. sp. 



dd The middle pair about the same size as the second laterals ; 

 bloodworms, pl.23, fig.G, No. 83 ; and pl.22, fig.21, No. 84 



Pupae 

 aa Lateral fin of the eighth abdominal segment terminates in a spur, which 

 may be simple or toothed 

 6 Spvu' simple, without teeth 



c Abdominal segments each with a few long setae, pl.22, fig.20 



40. ? f u 1 V u s n. sp. 

 cc Abdominal segments each with a pattern of very minute spines 



d Spurs of eighth segment stout, pl.23, fig.l2. .60. d e c o r u s n. sp. 

 dd Spurs slender and seta-like 



e See pl.22, figs. 8 and 12 43. m o d e s t u s 



ce See pl.21, figs. 2 and 3 25. t e n e 1 1 u s 



1)7j Spur, if present, with teeth 



c Spur wanting, pl.22, flg.l4 43b. Var. of modestus 



cc Spur present 



(/. Large species over 15 nun. in length, pl.23, fig.l4 



59. ? p 1 u m s u s 

 dd Smaller species 



e Each abdominal segment with a fuscous transverse band near 

 the anterior margin, produced at the ends into lateral longi- 

 tudinal vittae, pl.22, figs. 3 and 4 41. f 1 a v u s n. sp. 



ee Not so marke<l. Species from Saranac Inn, pl.22, figs. 13 and 17, 

 and fig.l8 (perhaps T any tarsus sp.) 

 aa Lateral fin with a comb of three or more teeth 

 b Comb with three distinct teeth, pl.22, fig.26 



44. f u 1 V i V e n t r i s n. sp. 

 bb Comb not as shown in this figure 



c The median abdominal segments each marked with three trans- 

 verse bands ; the first and third narrow, the middle one wide with 

 a number of hyaline sjiots. pl.21, figs. IG and 17 



16. flavicingula 

 cc Abflominal segments not so marked 



(/ In nearly matvu-e pupae may be seen the lobes on the dorsum of 

 each abdominal segment of the enclosed imago, pl.23, figs. 4 

 and 5 52. 1 o b i f e r u s 



