118 DIPTERA OF MINNESOTA. 



of Solamim caroUnensis; in the fruit of Prnnus, Lonicera, etc.; other 

 larvae in the blossoms and in galls on the stems or roots of various 

 Compositce ; others in the galls and roots of Achillea the flowers of 

 Hicraciiim, etc. The larvs of one genus live in oranges and lemons. 



There are over 200 species of this family in North America. They 

 are very numerous, for the most part small, brownish, with markedly 

 mottled, or curiously marked wings. The largest species in our 

 collection is Trypcta diffusa, about two-thirds of an inch long. 



Minnesota species so far taken : Straussia longipennis, Wied., Fig. 

 5, Plate I ; Oedaspis polita, Loew ; Rhagolctis pomonella, Walsh ; 

 Camptoneiira picta, Fab. ; Oedaspis atra, Loew. ; Euaresta f estiva, 

 Loew. ; E. bella, Loew. ; Acidia suavis, Loew. ; Euaresta aequalis, 

 Loew.; Carphotricha (Paracantha) culta, Wied.; Spilographa Havo- 

 iiotata, Macq. ; 6". diffusa, Snow ; Eurosta solidaginis. Fitch. We illus- 

 trate (Fig. 113) the fly whose maggots tunnel in apples. 



SAPROMYZIDAE. 



For the most part small flies, though Palloptcra superba, Loew., 

 a yellowish species, with wings strikingly marked with ^black, taken in 

 this state, is nearly half an inch long. As the name indicates, these 

 flies frequent decaying vegetable matter, in which the larvae breed. 

 One species was bred from the flower stem of an orchid ; one was reared 

 from human excrement ; the larvae and pupae of another was found 



Fig. 114. Sapromyza lu('tilina. Ltigger. 



in decayed wood. Aldrich lists 103 North American species. We 

 have secured in this state: Lauxiania cylindricoruis. Fab.; Sapro)nysa 

 vtilgaris. Fitch ; Palloptcra superba, Loew. 



