AQUATIC INSECTS IN THE ADIRONDACKS 557 



ciently active thereafter to kick vigorously whenever the vial was moved, 

 The imagos emerged July 2, ii days after leaving the water. The pupa 

 makes its way through the side of the cocoon, and the empty pupal skin 

 is left sticking in the hole when the imago flies away. 



In the supply trough in the hatchery fresh-water sponges of small size 

 were easy to find, and I saw the Sisyra larvae clinging to them, 

 crawling over them, and apparently piercing them whh their long, sharp 

 decurved jaws. I also observed this later on a sponge-covered log in 

 Little Clear pond. The larva clings closely to the sponge surface, lies in 

 the hollows of it, or, sometimes, descends bodily into an open osteole. 

 The numerous spines on its back usually carry a load of debris beneath 

 which its form is well concealed. It can readily be driven about over 

 the sponge surface, but will hardly be induced to take a step away from 

 it on the bare wood. 



The respiratory filaments are jointed and folded beneath the abdomen. 

 They are moved intermittently in a rapid shuttle-like vibration. 



Imagos on emergence seemed by preference to fly at once to the 

 hatchery ceiling. They congregated on the best lighted portions of it. 

 I stood in one spot on my work table and collected from the part of the 

 ceihng within reach hundreds of specimens at a time. Nothing was 

 easier. They would jump directly into an unstoppered bottle held close 

 below them. Their flight to the ceiling on emergence suggests a prob- 

 able reason why I was able to see so few specimens out of doors. There 

 they probably fly directly to the tree tops — the home of their nonaquatic 

 kin. A few specimens were taken at a trap lantern placed near the out- 

 let of Little Clear pond. I caught one or two specimens close above 

 the water while sweeping aquatic vegetation in Little Clear creek. These 

 may have been females ovipositing, but I did not find their eggs. Neither 

 did I get them, though I several times inclosed females in cages supplied 

 with aquatic plants and with sponge-bearing pieces of wood. 



A student in my laboratory at Lake Forest college is working on the 

 anatomy and metamorphosis of this species. I prefer to leave the farther 

 characterization of the several stages to the paper which will result from 

 that work. 



CLIMACIA 



1869 McLachlan. " New species of Hemerobina, with, synonymic notes", Ent. 

 month, mag. 1:27. The genus is carefully characterized, and is cor- 

 rectly allied with Sisyra, from which it is distinguished by the fol- 

 lowing characters, the first of which will not hold : 



1 A single basal cross vein in the subcostal space 



2 Two well defined series of gradate vcius 



3 Prothorax elongate 



4 Face long and triangular 



^5 Two curious setiform organs, apparently attached to the maxillae 



