1930 ] 
Notes on Hippoboscidx 
309 
5. Vertex distinctly narrower at the occiput than at the 
fronto-clypeus in both sexes. Scutellum very wide 
and nearly rectangular, with a median, rufous, and 
two lateral, ivory-white spots. Legs bright reddish; 
bristles of head and thorax brownish black. Larger, 
the wing 7 to 9 mm. long H. rufipes 
Vertex about as wide at the occiput as at the fronto- 
clypeus. Scutellum narrower and less rectangular, 
with a median, ivory-white spot. Legs rufous-yellow; 
bristles of head and thorax pale. Smaller, the wing 
6.5 to 8 mm. long H. hirsuta 
6. Two pairs of vertical bristles. Sclerotized upper plate 
of vertex (or vertical triangle) about as long as wide 
at the occiput, much shorter than the medio-vertex, the 
latter considerably narrowed in the middle by the 
very broad inner orbital plates. Apical lobes of fronto- 
clypeus broadly separated by a semi-elliptical notch. 
Second longitudinal vein ending in the tip of the 
first, opposite the anterior cross-vein. Anterior basal 
cross-vein very oblique and nearly its own length from 
the anterior cross-vein. Scutellum semi-elliptical in 
outline, its posterior margin distinctly convex and 
slightly projecting in the middle. No pad-like pulvilli; 
the bristle-like empodium bare, except at the base. 
Larger, the wing 9 to 10 mm. long H. camelina 
One pair of vertical bristles. Sclerotized upper plate 
of vertex longer than wide at the occiput, as a rule 
longer than the medio-vertex, the latter moderately 
narrowed by the inner orbital plates. Apical lobes 
of the fronto-clypeus separated by a narrow notch. 
Second longitudinal vein reaching the costa close to 
the tip of the first and apicad of the anterior cross- 
vein. Anterior basal cross-vein short, almost vertical 
upon the fourth longitudinal and more than twice its 
own length from the anterior cross-vein. Scutellum 
subrectangular, broadly truncate at the apical margin, 
not projecting in the middle. Two pad-like pulvilli; 
the empodium feathered. Smaller, the wing 7 to 7.5 
mm. long ........ JI. struthionis 
