332 



NORTH AMERICAN DIPTERA. 



The above definition will, in most cases, distinguish 

 the members of this large family of inconspicuously col- 

 ored flies. Its limits, however, are not sharp; with the 

 true muscids it is connected by Muscina and allied forms; 

 with the Cordyluridse by Fuccllia, etc. When one has 

 become tolerably well acquainted with the allied fa mi- 



Fig. 136, Anthomyidae. i, Hyetodesia (Phaonia) luconim, head, 

 from front; 2, Schoenomyza chrysostoma, head, from in front; 3, Cce- 

 nosia cinerea, head; 4, Lasiops spiniger, wing; 5, Lasiops spiniger; 

 head; 6, PhyUogaster cordyluroides, head; 7, Pfomalomyia (Fannia] 

 scalaris head; 8, Homaloinyia scalaris, wing; 9, Ophyra aenescens, 

 head; 10, Spilogaster, species, head; u, Spilogaster, wing; 12, Lenco- 

 melina, species, wing; 13, Leucomelina, antenna; 14, Lispa uliginosa, 

 head; 15, Lispa, species, head from in front; 16, Limophora exul, head. 



