MAY FLIES AND MIDGES OF NEW YORK 



T.airs with setae. Mandibles curved, slender at the apex, stout 

 M ally (fi-T) The hypopharynx lies rather far back from the 

 lu If olenfng, about o'n a'line with the eye spots. It is curved 

 like the jawbone of a mammal, the dorsal surface «f ^^^ "^^^^ 

 section beiug fringed. In fig. 5 this fringe is flattened down. The 

 "blum is iwndel, and has\ single cephalad P^ W^^^^^^^ 

 its inner surface. Upon the outer surface are two setae on eacn 

 sideTfi^eT The body is wholly devoid of setae excepting at 

 titMudf/ end. At tL caudal end thei. - -gM long se 

 arrano-ed in four groups of two each (pl.li, fig.3). ^es des tnese 

 there are four very small and delicate ones. The blood giUs 

 (retracted in most' specimens) are white, short, slender, and 



'^^'^^^t^'^.ro.n in color, with the abdomen slightly 

 Jer Lenoth 3.5 to 4 mm. The respiratory trumpet is slightly 

 Llarged a't^he apical end (pl.18, fig.9), ^^^ut five tn es a,^^^^^^^ 

 as wide Upon the dorsal surface is a group of about ten small 

 setae Upon the dorsal surface of the first abdominal segment 

 there is a^^roup of five or six very small setae on each side. The 

 i:;^g se ments, excepting the last two, have from 6 to 

 setae on the dorsal surface, arranged as shown m fig. 10 Upon 

 the Central surface each segment has from 8 ^^j^^^-^^^^^ 

 each placed on the apex of a prominent tubercle (fig.ll) • The anal 

 fin consists of two pointed lobes with blackened tips. 



To Loew's description of the imago (loc. cit.) may be added that 

 the fore and middle tibiae sometimes have one or two stout black 

 setae besides the fine hair-like setae; and in the female each claw 

 has a very small tooth on the inner side. The male genitalia as 



shown on pi. 32, fig. 1. 



Bezzia sp. 



(P1.17, figs. 10 to 12) 



The larvae were taken from the stomach of a brook trout at 



Saranac Inn, N. Y. They do not appear to difl'er much from the 



larvae of B. s e t u 1 o s a , excepting that the labium possesses 



three teeth on the inner surface instead of one (fig.lO) • The pupa 



(fig 11) mav possibly belong to this species, for it is the only 



species which was found in that vicinity at that time, but of it 



many specimens were found. The respiratory trumpet is as shown 



in fi- 12. Each abdominal segment has upon its ventral surface 



several elongnto brown spots. The setae are short, and the basal 



tubercles smaller and fewer than in B. s e t u 1 o s a . The lobes 



of the anal fin are elongate and pointed (fig.ll) • 



