AQUATIC INSECTS IN NEW YORK STATB ~ 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 N. Y. The ktrook 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 
larva 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 stages of this insect. The form 
of its respiratory disk is very different 
from that of Epiphragma just described, ana*mouth parts ot unknown 
tipulid larva described herewith 
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. 
