320 



CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Seb. 



800. Copromyza equina Fall. 

 Everywhere abundant. Breeds in horse dung. 



Family PHYCODROMID^ 



Fig. 40. Coelopa frigtda Fallen. 



There are two genera, Coelopa and Omomyia, in North 

 America. Species of the former genus are found on the sea- 

 beach, often in large numbers about piles of kelp and sea- 

 weeds. They are about the size of species of Fucellia found 

 with them and resemble them in general appearance, but 

 when viewed under a lens are seen to be quite different. 



801. Coelopa frigida Fall. 

 Seaside and Newport Beach in July. 



