310 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



722. Muscina stabulans (Fall.) 



Common. The larvae breed in manure and may carry 

 disease. They have also been bred from pupae of other in- 

 sects, but these were probably dead pupae. 



Family ANTHOMYID^E 



Fig. 36. Limnophora narona (Walk.) 



This is a large family and, because of their general unat- 

 tractiveness and the difficulties of differentiation, they have 

 been rather neglected in North America in the past. They 

 are blackish or grayish in color and some resemble the 

 ordinary house-fly in appearance. Their larval habits are 

 varied but most of them breed in decaying animal and vege- 

 table matter. 



723. Hydrotaea orbitalis Aldr. 

 Mt. Jefferson, VIII-1 and Cascadia, VII-21 (Lovett). 

 Malloch det. 1918, Can. Ent., L, p. 311. 



724. Homalomyia manicata (Meig.) 

 Corvallis, VI-28. 



725. Homalomyia scalaris (Fabr.) 

 Corvallis. 



