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Hippoboscidae (Dip ter a Pupipara) 
Melophagus ovinus ovinus Linnaeus. 
Figs. 8, 9 A-D. 
Previous Records. A cosmopolitan species on domestic sheep. Speiser 
has described a “variety,” M. ovinusferus, from “Steinbok” in the Caucasus. 
Specimens Examined. From domestic sheep in various parts of the 
United States. 
Notes. The accompanying figures will form a basis for the comparison 
of this species with other closely related forms such as that which we are 
describing below. The differences will be pointed out in connection with the 
description of this form. 
Melophagus ovinus montanus new sub-species. 
Figs. 9 E, 10. 
Specimens Examined. Males only, from “mountain sheep,” probably 
either Ovis dalli or 0. canadensis, on the Alaska-Yukon boundary. The specimens, 
which have been in the Stanford Collection for some years, were received from 
the late Dr C. Gordon Hewitt. 
