298 
Hominoxious A rth ropods 
n. Wing hyaline with smoky median cross band, 
and two or three spots; posterior trochanters 
with hook in the male and a prominence in 
the female. World wide distribution. G. equi. 
nn. Wings without spots. 
o. Posterior crossvein (m-cu) distad of the 
anterior crossvein (r-m); legs, particularly 
the femora, blackish brown. Europe and 
North America . G. haemorrhoidalis 
00. Posterior crossvein opposite or proximad of 
the anterior crossvein. Europe and North 
America . G. nasalis 
11 . The costal vein ends at the tip of Mi 2, M1+2 with a 
bend, the cell R5 hence much narrowed in the 
margin, or closed. 
m. Proboscis geniculate, inserted in a deep slit; 
female without extricate ovipositor; arista 
either bare or plumose; squamae large; facial 
grooves approximated below, 
n. Arista bare, short. Larvae in rodents. Tropic 
America. B. princeps . Bogeria Austen 
nn. Arista pectinate above. 
o. Tarsi broadened and flattened, hairy, anal 
lobe of the wing large. Larvae in rodents. 
A number of American species. Cuterebra. 
00. Tarsi slender, not hairy; anal lobe of the 
wing moderate. Larvae in man and other 
mammals. Tropic America. D.cyaniven- 
tris.Dermatobia Br. 
mm. Mouth parts very small, vestigial; arista bare, 
n. Facial grooves approximated below, leaving a 
narrow median depression or groove, 
o. Cell R5 closed and petiolate, body nearly 
bare. Larvae in the nasal cavities of the 
smaller Ungulates. The sheep bot fly. 
O. ovis. Widely distributed. Oestrus L. 
00. Cell R5 narrowly open, body hairy. Larvae 
parasitic on deer. Europe and America 
. Ceplienomyia Latr. 
nn. Facial grooves far apart, enclosing between 
them a broad shield-shaped surface; squamae 
large; female with elongate ovipositor. 
Larvae hypodermatic on Ungulates. 
. Hypoderma Clark 
o. Palpi wanting; tibiae thickened in the middle, 
p. Hair at apex of the abdomen yellow; legs 
including femora yellowish brown.... 
H. diana 
