AQUATIC INSECTS IN NEW YORK STATE 



285 



processes arranged in a triangle in the female larva. There is 

 no such differentiation in E. fascipennis; the processes 

 are four, and alike in the two sexes. Possibly Beling had the 

 larvae of two species. 



An unknown Tipulid larva from a spring 



On plate 10, figures 4 and 5 we present a figure of a Tipulid 

 larva of very unusual form. A few specimens were obtained July 

 19, 1901, from a small, cold spring brook near Fall creek, be- 

 tween Ithaca and Varna X. Y. The trook was filled with water 

 cress, through which the cold water 

 trickled, and was hidden in the dense 

 shadow of a thick growth of trees. The 

 larvae were obtained only beneath the 

 water cress, in the thin layer of soft mud 

 overlving the rockv substratum. One 



I/O f 



larva was found, apparently preparing 

 for transformation, occupying a little 

 excavation among the roots of a layer of 

 wet moss, in a crevice of p, rock above the 

 level of the water. This specimen was 

 taken home for rearing, but was after- 

 ward lost; I do not know anything about 

 the other stages of this insect. The form 

 of its respiratory disk is very different 

 from that of Epiphragma just described, 

 but, aside from that, it is more like Epi- 

 phragma in form of body and prolegs and in mouth parts than 

 any other Tipulid larva known to me, and I think it will be found 

 to belong to some species of larger size belonging near Epi- 

 phragma in the series. 



Since my study of this larva Dr James Fletcher, of Ottawa 

 Can., has sent me a specimen of it from his home. He says it 

 is found " from time to time in water brought from a spring 

 through wooden pipes, and used for drinking." It may prove a 

 constant inhabitant of cold spring water. 



Fig. 19 Ventral aspect of head 

 and mouth parts of unknown 

 tlpuUd larva described herewith 



