THE CRANE-FLIES OF NEW YORK PART II 1015 



Associated with these larvae in Coy Glen, the following characteristic 

 forms of insect life occur : 



Plecoptera: a small species of Perlidae. 



Ephemerida: Ephemeridae, such asBaetis,/ron/m^7zs, Ephemerella, 



and others. 



Trichoptera: Ryacophilidae, Hydroptilidae, and other forms. 

 Neuroptera: Chauliodes larvae. 



Diptera: Chironomidae, a few; Psychodidae, Psychoda alhitarsis 

 Banks; Stratiomyiidae; Anthomyiidae, Limnophora torreyae Job.; 

 and other groups. 

 Coleoptera: Parnidae, larvae of Psephenus lecontei (Lee.), and adult 



beetles of a species of Elmis in large numbers. 



Up to the present time it has been found impossible to rear this larva 

 to the adult condition, chiefly because of the constant need of well-aerated 

 water and the difficulty of supplying it. By placing the larvae in the folds 

 of moistened cheesecloth, it was possible on one occasion to carry the 

 species to the pupal state, but no further. It will be of interest to 

 ascertain the identity of this conspicuous larva. 



Larva. Length, 24-25 mm. 

 Diameter, 2.6-3 mm. 



Coloration above, dark green with a brown pattern; beneath, light green with indistinct 

 transverse brown lines; on dorsum a pale longitudinal mark on sides of posterior ring, cross- 

 ing sutures between segments onto extreme base of anterior ring of following segment, the 

 dark area of each segment thus appearing cruciform, this cross-shaped mark spotted and 

 marbled with darker in transverse rows; base of gills and center of spiracular disk light green 

 in living, healthy larvae. 



Form moderately terete, each segment with transverse rows of small, prominent tubercles, 

 some of which are provided with setae. On dorsum of posterior ring a subterminal row of 

 six tubercles, the middle one on each side with two setae, the remaining four tubercles unise- 

 tose; two rows of smaller naked tubercles at base and middle of posterior annulus; basal 

 annulus with four transverse rows of small naked tubercles; pleurites with three tubercles, 

 a small seta on basal ring ventrad of basal tubercle, and two setae on posterior ring ventrad 

 and cephalad of posterior tubercle; sternites on posterior ring with six setae, four on ante- 

 rior row, the two middle ones very tiny. Spiracular disk almost as in T. collaris, T. ignobilis, 

 and similar species, surrounded by six lobes fringed with moderately long hairs; inner face 

 of lobes somewhat pale; ventral lobes with a narrow, capillary, dark brown line, extending 

 from tip toward base; lobes narrowly and more or less indistinctly margined with brown; 

 two brown spots at base of each ventral lobe, underneath each spiracle; dorsal and lateral 

 lobes jutting backward at tips into fleshy conical points. Spiracles circular, moderately 

 large, separated by a distance about equal to one and one-half diameter of one. Anal gills 

 with eight branches, rather short and stout, with two lateral divergent branches on either 

 side and an inner pair with one ventral and one posterior branch (Plate XCII, 512). 



