AQUATIC INSECTS IN NEW YORK STATE ea We 
the rear between the wings; brown spots on the base and in the 
furrows of the wings. Legs pale, smooth, somewhat infuscated 
on the tarsi. © | 
Abdomen with a median dorsal interrupted band of brown, | 
preceded by an urceolate divided brown mark on the metatho- 
racic dorsum, furcate anteriorly on segment 1 of abdomen, 
broadly overspreading segments 2 and 3 with additional brown 
spots at the sides and divided by paler apically; reduced to a 
slender T-mark on 4, the T-mark and lateral spots reappearing 
on 5, the T-mark joined to an apical transverse line on 6, and on 
7, fused with the lateral spots, a median line with lateral 
()-marks on 8 and 9, 10 with the line and the margins narrowly 
(the apical margin more broadly) fuscous. 
Gills on segments 1-7, on 7 simple, and almost symmetric, a 
slightly indicated basal lobe on the posterior side, on 6, 5, 4 and 
3 this basal lobe is successively more pronounced, becoming 
separated by a deep notch on 3; on 2 and 1 this lobe becomes 4 
third as large as the body of the gill under which it is then 
folded, and a shallow incision appears on the anterior side of 
the body of the gill, nearer apex than base. All gills erect, with 
tracheae pinnately branched. The setae are pale with a wash 
of darker color near the tip. 
Other items in the food 
The eight water mites, Atax crassipes Mill., found in 
the food may well have been taken accidentally, as they are so 
small they could scarcely have been taken otherwise. 
The large number of Daphnidae found in a single stomach is a 
peculiarity for which I have no explanation to suggest. They 
were in an advanced state of digestion, and the number given 
is only approximate. There were fragments of what I took to 
be Daphniae in the stomach of trout 5 also, but scarcely recog- 
nizable. The difficulty of recognizing and counting these was 
quite in contrast to the ease and certainty with which the same 
things were done for the other food constituents. The heads 
of Chironomus and Corethra were most distinctive, and were 
the parts longest resisting digestion, so that among a mass of 
fragments it was only necessary to count the heads. 
The items listed as miscellanies were doubtless all accidental 
‘and unimportant. I think that the trout scales found did not 
| indicate that any trout had been eaten, but only that they had 
‘been fighting, and this one had bitten another deeply enough to 
‘loosen a bit of its cuticle. 
