1942] 
Notes on Hippoboscidce 
113 
Specimens Examined. — New Mexico: Fort Wingate, 2 9 , 
one the holotype at the British Museum, off Aeronautes saxatilis 
(R. W. Shufeldt Coll.). — Colorado: 1 $ off Aeronautes sax- 
atilis, without more definite locality (collected in May 1882 by 
Joel Allen. — M. C. Z.). — Utah: Kanab, Kane Co., 1 $ off 
Aeronautes saxatilis (July 1934; W. J. Breckenridge Coll. — 
Univ. of Minnesota). — The collection of the M. C. Z. also 
contains two specimens (9 $ ) received from Osten Sacken, 
without locality, but with the host record, “off Nephoecetes 
niger (Gmelin).” This is a swift, a race of which ( borealis 
Kennerly) occurs in western North America from southeastern 
Alaska to southern Mexico. Most probably Osten Sacken’s 
specimens came from California. The species is also known 
from Wyoming. 
The following differences have been noted between B. fim- 
briata and the new South American species described in this 
paper. Head relatively broader, more nearly elliptical, scarcely 
longer than its greatest width. Inner orbit narrower, about as 
wide as mediovertex before the postvertex; frontal bristles 
spread over a wider area, which expands both at the upper and 
lower ends; 2 to 4 vertical bristles in the upper corner, which 
is somewhat set off from the remainder of the side of the frons. 
Postvertex shorter and broader, more semi-elliptical, much 
shorter than mediovertex. Appendage of second antennal seg- 
ment longer and narrower, about two and one-half times as 
long as greatest width, widened about mid-length, bluntly 
rounded off at tip. No trace of median notal suture. Meta- 
pleural (“pleurotergal”) protuberance barely indicated. Wing 
much longer and narrower, more elliptical, about one and one- 
half times as long as wide; rudimentary venation more dis- 
tinct. A much smaller fly: total length in dried condition, 6 
mm.; from tips of fronto-clypeus to hind margin of scutellum, 
3.2 mm.; of wing, 1 mm. In the male the parameres are present 
and shaped almost exactly as in the Neotropical species. 
Brachypteromyia neotropica, new species. Fig. 1 
Male. — Head broadly oval, about one and one-fourth times 
as long (from tips of fronto-clypeus to occipital margin) as 
greatest width. Frons at its narrowest nearly six times as wide 
as the eye; inner orbits (parafrontalia) very wide (before the 
postvertex slightly wider than mediovertex), conspicuously 
