30O ENTOMOLOGICAL NEWS. [Dec., *O2 



There is no intention of giving here any descriptions of larvae 

 or any attempt at a classification : it is simply a brief statement 

 of the species found, the general character of the places where 

 found and those points in general appearance that distinguish 

 them. The figures on Plate XV give the form of the antennae 

 and of the corneous part of the labium ; the drawings being 

 free-hand, without close regard to scale. The determinations 

 of the adults were made by Mr. Coquillett, but are subject to 

 revision in some cases. 



Early in spring the larva of C. canadensis was found in wood- 

 land pools and springs as described on page 267 of this volume. 

 Associated with it was C. cantans which resembles it so closely 

 that the two are not easily recognized as distinct. Cantans is 

 a somewhat larger and more robust larva, with shorter, stouter 

 antennae. The corneous labial structure is almost the same. 

 Both larvae have short breathing tubes ; but that of cantans is 

 shorter and approaches that of sollicitans with which it is also 

 found associated in brackish pools on salt meadows. The latter 

 has still shorter, more slender antennae and has the labrum ob- 

 long, squarely terminated in front, while cantans has it rounded 

 and, as a whole, somewhat heart-shaped. These three species 

 are closely related. 



C. t&niorhynchus also occurs with sollicitans and has exactly 

 the same habits. I have bred the two species from eggs in the 

 same piece of sod and did not realize until adults emerged, that 

 two kinds of larvae were in the dish. The only differences I 

 could find are the somewhat longer antennae and the somewhat 

 shorter labium. The species does equally well in fresh or salt 

 water. 



Another early larva is what I take to be that of perturbans 

 with a short anal siphon and very prominent antennae. The 

 latter are white at base, black beyond the constriction and with 

 a very prominent tuft of feathered hair. The structure of the 

 labium indicates what Dr. Dyar terms the ring-legged group, 

 and perturbans is the only member of that group taken where 

 this larva occurred that I have not bred. The larva is a large 

 one. 



C. confinis occurs in meadow pools, road puddles and rather 



