AQUATIC INSECTS IN NEW YORK STATE 333 



influenced by the veins of the wing, though apparently constant 

 in position in a given species. 



The larvae live in running water. The head has a pair of 

 slender antennae; the cephalothorax and the following seg- 

 ments each with a conical process bearing a bunch of bristles; 

 pupa flattened, inactive and free, inclosed in a semioval shell- 

 like skin, the anterior end with erect breathing tubes; on the 

 underside the skin is soft and transparent. 



Genus blepharocera Macq. 



This genus is distinguished from the other genera of this 

 family, in that the eyes are holoptic (i. e. contiguous); bisected 

 by an unfaceted cross band or by a single groove. The radius 

 (Oomst.) is three branched (i. e. the second longitudinal vein is 

 not furcate) ; and the vein M3 with its basal end free and begin- 

 ning in the middle of the wing. See figure in Oomstock's Manual, 

 p. 433. 



Blepharocera eapitata Loew 

 Berl. Ent Zeit. 1863. Centur. 4; p.43 

 So far, but one species of this family, Blepharocera 

 eapitata Loew, has been recorded from this State. It is 

 very abundant in several of the ravines about Ithaca, and larvae 

 have been found in other parts of the Statte. The first adults 

 observed the past year, emerged about June 1, and they had 

 all disappeared by July 15. The fact that their season of flight 

 is a short one, and that they are found only near the water's 

 edge in deep and comparatively inaccessible ravines, accounts 

 for the scarcity of the species in collections. The life history of 

 this speciesi has already been given by Prof V. L. Kellogg in 

 Entomological Nmos for January 1900, p.305-18; and the imago 

 has been described by Loew in the Berliner Entomologisclw 

 Zeitschrift, 1863, p.43. The life history may be briefly stated as 

 follows : 



The eggs have not yet been discovered. The larvae may be 

 found throughout the month of May, in shallow but swiftly 

 flowing water. About Ithaca they have been found most fre- 



