306 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Se». 



These much resemble the house-flies in general appearance. 

 The antennal arista is plumose at the base and bare at the 

 tip. The flies are very common about decaying vegetation, 

 excrement, dead bodies, etc., and are called flesh-flies. 



The larvae are found in decaying vegetable and animal 

 matter. A few are true parasites and are economically im- 

 portant. Many of the species are larviparous and some are 

 known to strike grasshoppers on the wing and place their 

 larvae in a vulnerable spot. 



The following species were determined by Dr. Aldrich. 



691. Sarcophaga aculeata Aldr. 



Specimens from Corvallis are probably a new variety. 

 1916, "Sarcophaga and Allies", p. 143. 



692. Sarcophaga bullata Parker 

 Corvallis, X. 1916, Can. Ent., XLIII, p. 359. 



693. Sarcophaga cimbicis Towns. 

 Corvallis. 



694. Sarcophaga eleodis Aldr. 



Corvallis, V-6. This species is remarkable, in that it 

 parasitizes beetles of the genus Eleodes. 1916, "Sarcophaga 

 and Allies", p. 128. 



695. Sarcophaga haemorrhoidalis (Fall.) 



Corvallis, X-21. A scavenger of wide distribution, occa- 

 sionally the cause of intestinal myiasis. The species occurs 

 throughout Europe, Africa and Asia. 



696. Sarcophaga helicis Towns. 



Corvallis, IX-20; Forest Grove. One of the commonest 

 North American species, largely a scavenger but also a true 

 parasite of grasshoppers, Eleodes, etc. 



697. Sarcophaga hunteri Hough 



Corvallis, VI-2 to VII-22 (Rockwood) ; Forest Grove, 

 X-2 (Creel). A grasshopper parasite. 



