JOURNAL 



OF THE 



JQfId ]BoFh €lnknioIogirBl ^oriFJ^g. 



Vol. XXIII. DECEMBER, 1915. No. 4. 



NOTES ON THE IMMATURE STAGES OF SOME NEW 

 YORK TRICHOPTERA.* 



By J. T. Lloyd, 

 Ithaca, N. Y. 



The larvae of the four species of Trichoptera whose immature 

 stages are herein described were captured in waters in the vicinity 

 of Ithaca, New York. The adults which emerged in captivity, ex- 

 cept Ncuronia pardalis, were kindly determined by Mr. Nathan Banks. 



Neuronia pardalis Walker. 



Larval Habits. — The larvae were found in two small spring-fed 

 streams in the McLean swamp, about eighteen miles north of Ithaca. 

 These streams are overhung with a dense thicket of alders and their 

 bottoms are littered with fallen leaves, but are almost free from 

 living vegetation. 



Few specimens were found and little effort was made to draw 

 conclusions concerning the food and habits of the species. Such 

 observations as were made, however, indicate that the habits are the 

 same as those of the well-known Neuronia concatenata. The larva 

 of this species crawls about over the bottom and among submerged 

 vegetation feeding on leaves living and dead. In preparing to pu- 

 pate it attaches its case tightly in some secluded crevice and spins 

 a silken mesh across each end of the case. Frequently fragments of 

 grass or other bits of vegetable matter are cemented around the for- 

 ward end of the case. 



* Contribution from the Limnological Laboratory of the Department of 

 Entomology in Cornell University. 



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