1939] 
Notes on Hippoboscidae 
73 
(Ri) and usually apicad of anterior cross-vein (r-m) ; 
last section of costa about three times the length of 
penultimate section or shorter. Base of third longi- 
tudinal vein (R 4 + 5) bare. One pair of vertical 
bristles. Preapical bristles of scutellum few (3 to 
11). Abdomen with three median tergal sclerotized 
plates in both sexes (in equina and longipennis ; not 
known in fulva) . Two pad-like pulvilli at sides of 
bristle-like empodium, one much larger than the 
other. Parameres of male genitalia slender, rod-like, 
ending in a point 2 
Second longitudinal vein short, shorter than last section 
of third longitudinal, reaching costa together with or 
close to tip of first longitudinal ; last section of costa 
at least five times the length of penultimate section . 4 
2 . Larger species, the wing 6 to 8.5 mm. long. Apical 
lobes of fronto-clypeus irregularly and broadly tri- 
angular, their inner margins curved. Scutellum 
fuscous to ferruginous laterally, yellowish-white 
medially, rarely more extensively yellowish; with a 
regular row of 5 to 11 preapical bristles (usually 
6 to 8 ), divided into two groups. Wing veins as a 
rule rufous to dark brown H. equina 
Smaller, the wing at most 6 mm. long. Scutellum as a 
rule entirely or nearly entirely yellowish or ivory- 
white 3 
3. Wing 5 to 6 mm. long. Apical lobes of fronto-clypeus 
regularly and sharply triangular, separated by a 
broad notch, their inner margins nearly straight. 
Scutellum with 3 to 7 preapical bristles (usually 5 
or 6 ). Wing veins mostly pale testaceous, usually 
with some darker stretches H. longipennis. 
Wing 4.2 to 4.5 mm. long. Apical lobes of fronto-clypeus 
irregularly and broadly lobular, separated by a nar- 
row slit, their inner margins curved. Scutellum with 
about 8 preapical bristles H. fulva 
4. Base of third longitudinal vein (R 4 + 5) setulose over 
some length on the upper side. One pair of vertical 
bristles. No median tergal plates in both sexes (in 
variegata, rufipes and hirsuta ; probably also in mar- 
