,")-! BIOLOGICAL SURVEY OF 



Perlidae. The Stone-flies 

 I'kki.a Geoffroy 



I*. [mmabginata Say. Duck Brook, Aug. L8. 

 P. media Walk. Long Pond, June 25-27. 

 P. sp. Long Pond, .June 15. 



Alloperla Banks 



A. imbecilla Say. Breakneck Br., Duck Br. Sea Wall Bog, 



June 16 (Alex.). 

 A. lateralis Banks. Valley Cove, Breakneck Br., June 16. 



Canyon Brook, June 23-July 2o all (Alex.) Bar Harbor, 



June 15-July 20. 

 A. marginata (Banks). Breakneck Br., June 16 (Alex.). 

 A. mediana Banks. Bar Harbor, June 14. Echo Lake, June 



22. Breakneck Brook, June 16 and Canyon Brook, June 23 



(Alex.). 

 A. pallidula (Banks). Same as above. 



Chloroperla Newman 



C. cydippe Newn. Echo Lake, July 12. Duck Br., June 16. 



Isoperla Banks 



I. bilineata Say. Duck Brook ; Breakneck Brook, June 16 



(Alexander). 

 I. Montana Banks. Bar Harbor, June 8. Duck Brook, June 



16, Breakneck Brook, June 16 (Alexander). 



Perlinella Banks 



P. drymo Newn. Jordan Pond, June 1(5. 

 P. n.sp. Valley Cove, June 19 (Alexander). 



A.CRONEUBIA Pietet 



A. abnormis Newn. Corfield at light, July (!, 1936. Scarce. 



A. lycorias Newn. Long Pond, July 20. 



A. Pennsylvania (Rambur). Record of capture lost. 



