. Aquatic insects in New York state ; a study conducted at the entomologic field station, Ithaca, N. Y. under the direction of Ephraim Porter Felt. Insects; Aquatic insects; Dragonflies; Fishes. 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
. Aquatic insects in New York state ; a study conducted at the entomologic field station, Ithaca, N. Y. under the direction of Ephraim Porter Felt. Insects; Aquatic insects; Dragonflies; Fishes. 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 ; It may prove a constant inhabi
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