HORSEFLIES OF THE SUBFAMILY TABANINAE 133 
Distribution —Alaska to Newfoundland. June 10 (Fawcett, Al- 
berta) to July 20 (Stephensville, Bay St. George, Newfoundland). 
In the United States National Museum, six females. 
Philip pointed out to the writer the similarity between the females 
of Tabanus cristatus Curran and 7’. gracilipalpis. Specimens which 
the writer compared with the allotype female of cristatus do agree 
with the type series of gracilipalpis. The female of gracilipalpis 
is very close to that of 7. affinis Kirby, and specimens collected 
at the same time and place as the type series of gracilipalpis seem 
to be afinis. The males of cristatus and affinis are quite distinct, 
however, and, unless the sexes are not correctly associated in cristatus, 
the species is distinct from affinis. 
TABANUS PHILIPI, new species 
(Fig. 63, B) 
Rather small; abdomen laterally broadly orange; frons rather broad, with 
parallel sides; antenna black; palpus stout. 
Female.—Length 12 mm. Eye densely pilose. Frons gray, slightly less 
than twice as high as wide, with nearly parallel sides; basal callus dark 
chestnut brown, transverse, nearly twice as wide as high, rounded above; 
median callus small, indistinct, narrowly connected with basal callus; ocellar 
tubercle prominent, yellow brown; subcallus flat, gray. Antenna black, the 
first two segments with black hair; basal portion of third scarcely longer 
than annulate portion, with low dorsal angle and no excision. Clypeus and 
genae light gray, with mostly yellowish-white hair. Palpus creamy white, 
the first segment with mostly white hair, second with mostly black; second 
swollen basally but tapering to acute apex. Proboscis extending little beyond 
palpus. 
Thorax blackish, the prescutal lobes tinged with reddish, and hair mixed black 
and yellowish white. Wing hyaline, the costal cell and a small spot at furecation 
brownish; venation normal. Coxae gray, with white hair; femora black or 
dark brown; tibiae yellowish brown, the fore tibia darkened apically ; hind tibial 
fringe black; tarsi dark brownish, the fore tarsus darkest. 
Abdomen black above, tergites 1-8 orange laterally and this color faintly 
extending onto tergite 4; median dark area rather broad; pale median spots 
indistinct; tergites with narrow, pale, posterior margins; venter black, with 
sides broadly orange and incisures rather broadly yellowish. 
Male.—Unknown. 
Type.—Female, in the American Museum of Natural History. 
Type locality—Seattle, Wash. 
The type was collected July 15, 1901. It bears a determination of 
“Tabanus pumilus Macquart” in Hine’s handwriting and another by 
W. Marchand as “7. typhus %.” It is very distinct from either of 
these species. The writer takes great pleasure in naming this species 
in honor of Cornelius B. Philip, who has so generously shared his 
knowledge of the Tabanidae. 
TABANUS SONOMENSIS Osten Sacken 
(Fig. 64, 4) 
Tabanus sonomensis Osten Sacken, U. S. Geol. and Geogr. Survey Terr. Bull. 3: 
216-217, 1877; Coquillett, Wash. Acad. Sci. Proc. 2: 407, 1900; Hine, Ohio 
Nat. 5: 244, 1904; McDunnough, Canad. Ent. 53: 148, 1921; Rowe and 
Knowlton, Canad. Ent. 67: 244, 1935. 
Rather small; orange on side of abdomen basally; antenna black; eye pilose; 
subeallus pollinose; second palpal segment enlarged basally; third antennal 
segment with low dorsal angle and little, if any, excision; vein Rs frequently 
with a stump vein. 
