Muscidcz 



309 



ff. Body black or sordidly metallic greenish gray, usually yellow pol- 

 linose or variegate; genae at most hairy above. N. stygia. 



Eastern Hemisphere Neopollenia Br. 



dd. Vibrissal angle situated nearly on a level of the oral margin, 

 e. Species wholly blackish, bluish, or greenish metallic in color. 



f. First section of RI+S with at most three or four small bristles at 



the immediate base. 



g. The bend of Ri+5 a gentle curve; costal spine present; cell R$ 

 closed, ending before the apex of the wing. S. cuprina. 



Java Synamphoneura Bigot 



gg. Bend of RI+S angular; or the insect differs iri other characters ; 

 dorsal surface of the squamula thoracalis hairy (except in 

 Melinda); arista plumose only on the basal two-thirds 

 (except usually in Calliphora and Eucalliphora} . 



168. Head of horn-fly (Lyperosia irritans); (a) female; (6) male; (c) lateral aspect of female. 



h. Arista plumose only on the basal two-thirds. 



i. Base of the antennae ventrad of the middle of the eye; eyes 



of the male nearly contiguous; gense hairy; second 



abdominal segment with median marginal macrochaetae ; 



two, rarely three, postsutural intraalar macrochaetae. 



j. Squamula thoracalis dorsally with long black hairs; male 



hypopgium two-segmented, large, projecting; claws 



and pullvilli of the male elongate; three strong sterno- 



pleural macrochaetae; genae at least half the width of the 



eye; buccae (cheeks) half the height of the eyes; ovivi- 



parous. O. sepulcralis. Europe Onesia R. D. 



jj. Dorsal surface of the squamula thoracalis bare; male 

 hypopygium small, scarcely projecting below; claws 

 and pulvilli not elongate; two stout sternopleural 

 macrochaetae, sometimes with a delicate one below the 

 anterior; genae nearly linear in the male; buccae about 

 a third of the eye height; oviparous. M. ccerulea. 

 Europe Melinda. R. D. 



