406 BIOLOGICAL SURVEY <>K 



0. nudiusculus Loew. "Mt. Desert," .July 21 (McAtee). 

 0. borob Macq. In rotting birch bark (Br.), Oct. 28. 



0. TBIORAMMA Loew. Narrows ; Tremont ; Salisbury Cove 

 kug. 13-23. 



Ephydridae. The Shore Plies 



Brooks, swamps and shores with the attending vegetation 

 is where these will be found. Look into the blossoms of water- 

 lilies and other aquatic plants. 



Trimerina Macquart 



T. madizans (Fall.). Bar Harbor, Aug. 16. 



Clanoneurum Becker 



C. cimiciformis (Halid.). Marsh at the Narrows, Aug. 15, 

 1920. 



Discocerina Macquart 



D. leucoprocta Loew. Narrows, June 9. 



Ilythea Haliday 



1. spilota Curtis. Common, June 27- Aug. 21. 



Rhysophora Cresson 



R. robusta Cress. Witch Hole Pond, July 30. 



Ditrichophora Cresson 



D. exigua Cress. Bar Harbor, July 22, 1919. 

 D. parilis Cress. Bar Harbor, Aug. 18. 



Psilopa Fit lion 



P. atrimaxa Loew. Bar Harbor, July 24; S. YV. Harbor, 



Sept. 6. 

 P. leucostoma Meig. Narrows, July 27. 



