354 BIOLOGICAL SURVEY OF 



Clusiodes Coquillett 



C. AMERICANA Mall. Greeii Mt., July 25. 



C. (Clusiaria) orbitalis Mall. Bar Harbor, June 13, 1921. 



Type locality. 

 C. (Columbiella) johnsoni Mall. Echo Lake, July 12. Type 



locality. 

 C. (Columbiella) nigripalpis Mall. Bar Harbor, June 17. 



Clusia Haliday 



C. czERNYi Johns. N. E. Harbor (Minot), July 1-25. 

 C. lateralis Walk. N. E. Harbor (Minot), July 4. 

 C. melanostoma Loew. CorlEield, June 15. 



Chamaemyidae 



The larvae are predaceous upon aphids. Look for adults 

 around burdock, thistle, and such plants. 



Leucopsis Meigen 



L. NiGRicoRNis Egger. Common, June 10-Aug. 13. 



Chamaemyia Meigen 



C. ARiDELLA Fall. Sand Beach, Great Head ; Long Pond, Julv 



11-21. 

 C. ELEGAXS Panz. Penikese, July 13. 

 C. JUNCORUM Fall. Upper Hadlock Pond; Salisbury Cove, 



June 10-July 15. 

 C. POLYSTiGMA Mcig". Salisbury Cove; Tremont, July 14- 



Aug. 23. 



Tetanoceridae. The Marsh Flies 



Sweeping around ponds and along streams and the edges 

 of swales will take these. 



SciOMYZA Fallen 



S. ARisTALis Coq. Eagle Lake, July 18. 



