AQUATIC IXSE'OTS IN NEW YORK STATTD 



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 i 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 N. Y. The brook 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 

 overlying the rocky substratum. One 

 lar-^a was found, apparently preparing 

 for transformation, occupying a little 

 excavation among the roots of a layer of 

 wet moss, in a crevice of a 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 stageiS of this insect. The form 

 of its respiratory disk is very different 



„ ._ . , . . -, -i, J Fig. 19 Ventral aspect of head 



from that of Epiphragma mst describea, and mouth parts of unknown 



^ ^ ^ tipulid larva described herewithi 



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. 



