300 Hominoxious Arthropods 



or curved; abdomen usually short or elongate 

 oval; sternopleurals, if three are present, 

 arranged in the order 1 :2 in a right triangle. 

 .... (MUSCIN^-ANTHOMYIIN/E of Girschner) 



o. M]+2 straight, hence cell R$ not narrowed in 

 the margin ........ ANTHOMYIID^ in part 



p. Underside of the scutellum more or less 

 sparsely covered with fine hairs; anal 

 vein nearly always reaches the hind 

 margin of the wing; extensor surface of 

 the hind tibiae with a number of stout 

 setae; squamae often small and equal. 

 Anthomyia, Chortophila, Eustalomyia, 

 Hammomyia, Hylemyia, Prosalpia, Pego- 

 myia, etc ____ HYLEMYIN^E-PEGOMYIKffi 



pp. Underside of the scutellum bare; anal 



vein does not reach the wing margin. 

 q. First anal vein short, second anal sud- 

 denly flexed upwards; hind tibiae each 

 with one or two strong setae on the 

 extensor surface. Fannia ( = Homalo- 

 myia), Coslomyia, Choristoma, Eur- 

 yomma, Azelia, etc. FANNlN.ffi-AZELlN.as 

 qq. Anal veins parallel or divergent. 



r. Setae on the exterior surface of the hind 

 tibiae wanting (except in Limnaricia 

 and Ccenosites), lower squama not 

 broadened to the margin of the 

 scutellum. Leucomelina, Limno- 

 phora, Limnospila, Lispa, Mydaea, 

 Spilogaster, etc ................. 



rr. One (rarely more) seta on the extensor 



surface of the hind tibia; squamae 



usually large and unequal. Hydro- 



taea, Aricia, Drymeia, Ophyra, 



Phaonia ( = Hyetodesia] , Pogono- 



myia, Trichophthicus, etc. ARICINJ2 



oo. Mi+2 curved or bent, hence the cell RS more 



or less narrowed in the margin. 



(MusciNjE). MusciDvE in part. See 



page 303 for generic synopsis. 



11. Hypopleurals present; when three sternopleurals 

 are present the arrangement is 2:1 or 1:1:1. 

 ..................... (TACHINID^E of Girschner) 



m. Conjunctiva of the ventral sclerites of the ab- 

 domen present, frequently well developed, 

 surrounding the sclerites. 



