142 



DIPTERA OF MINNESOTA. 



locust. S. caruaria, Linn., it is interesting to note, does not occur in 



the United States, though frequent- 

 ly figured and referred to as found 

 in this country by Riley, Lugger 

 and others. In fact, this is a very 

 comnion error to be found in older 

 publications on Entomology. All 

 references, therefore, to this species 

 as occurring in North America, 

 undoubtedly refer to some other or 

 several others. Riley found what 

 he supposed was this species parasitic on eggs of Rocky Mountain 

 locusts, and also on the growing insects. Dr. Hugo Summa records 

 (St. Louis Medical & Surgical Journal, May, 1889) a case of nasal 

 myiasis in man, due to a species of Sarcophaga, which he supposed 

 was carnaria. Dr. Walter B. Johnson, in Ophthalmic Record. 1892, 

 gives an account of a larva referred to this species, in the ear of man. 



Fig. 135. Sarcophaga, sp., which preys upon 

 the eggs of "grasshoppers" or locusts. 

 After Riley. 



/v.^ 



Fig. 136. Sarcophaga sarraceiiia. Lugger. 



S. dazidsonii, Coq., is claimed to prey upon the eggs of spiders. S. 

 hclicis, Townsend, has been reared from a May beetle or "June Bug". 

 Lachnosterna, sp., and from "grasshoppers," from the cabbage worm 



