150 



DIPTERA OF MINNESOTA. 



When human beings arc infested a skillful ph}'sician should at once 

 be summoned. 



This fly is found in North America, Mexico, Cuba, Columbia, 

 Venezuela, Cayenne, Brazil, Peru, Chili, Uruguay, Argentine Re- 

 public and New Holland. It is more injurious in tropical and sub- 

 tropical countries than elsewhere. 



Species of Mnscidae taken in Minnesota are as follows: Stoinoxys 

 calcitrans, hinn.] Calliphora voiiiitoria, Linn.; Compsomyia (Litcilia) 

 maccUaria, Fab. ; Cyrtoncura, sp. ; Pollcnia rudis, Fab. ; PscudopyrcJUa 

 cornicina, Fab.; Lncilia cacsar, Linn.; Miisca doniestica. Linn.; 

 MorcUia micans, Macq. ; Miiscina stabulans, Fall.; Haciitatobia 

 scrrata. Desv. ; Grophoinyia inaculata, Scop. 



TACHINIDAE. 



Tachina-iiics. 



Fig. 150. The Ked-tailed Tachina-fly, IVinthemia piistulata, a parasite of the Army 

 Worm; a, fly, natural size; b, fly enlarged; c. Army Worm, natural size, upon which 

 eggs have been laid; d, parasitized army worrris, much enlarged. After Slingerland. 



This extremely beneficial family, from the standpoint of the 

 ariculturist, is well represented in this state, we having taken here 25 

 species, and almost every species found here is represented by many 

 individuals. These flics are useful in that the larv?e are parasitic, 

 living for the most part inside of caterpillars which prey upon oui 



