302 BIOLOGICAL SURVEY OF 



PSYCHODA Latreille 



P. ciNEREA Banks. S. W. Harbor, June 18. 



P. siGNATA Banks. Long Pond ; Echo Lake ; Bar Harbor, June 



27-July 24. 

 P. SLOSsoNi Will. Bar Harbor; Salisbury Cove, July 19- 



Aug. 11. 



DiXIDAE 



Another water frequenter whose larvae live in ponds and 

 the like. 



DiXA Meigen 



D. CENTRALIS Loew. Bar Harbor, July 25; Duck Brook, 



Sept. 11. 

 D. MODESTA Jolian. Jordan Pond, June 10; S. W. Harbor, 



Aug. 30-Sept. 10 (Alexander). 

 D. FuscA Loew. Flying Mt., Aug. 26 (Alexander). 

 D. sp. Corfield, Sept. 8. 



CuLiciDAE. The Mosquitoes 

 EucoRETHRA Uiiderwood 



E. UNDERWOODI Uuclerw. Pools in a spring run at the head of 

 Bear Brook, near Bar Harbor, July 21; Echo Lake, Sept. 

 (Alexander). The larva is predaceous, feeding upon the 

 larvae of other mosquitoes. 



Chaoborus Lichteiistein 



C. AMERiCANUs Johan. (C. cristallina auct.). S. W. Harbor, 



July 13. These are non-biting. 

 C. TRmTTATUs Loew. Duck Brook, Sept. 11, 1922. Another 



non-biting species. 



