HORSEFLIES OF THE SUBFAMILY TABANINAE 17 
continuous row; sublateral spots oblique, rarely touching hind margins of 
tergites; venter blackish, with narrow gray bands. 
Male.—Kye bare, the areas of large and smali facets distinctly differentiated. 
Second palpal segment with apex acute and slightly decurved. Body colora- 
tion as in female. 
Described from a specimen collected by J. M. Aldrich on Mount 
Constitution, Wash., July 17, 1909. 
Type.—Originally there were two cotype females, but one of these, 
now in the collection of the University of Kansas and labelled 
“W. T.”, is herein designated as lectotype. 
Type locahity—Washington. 
Distribution—Yukon Territory to Washington and Idaho. July 
5 (Lilloeet, British Columbia) to August 18 (Terrace, British Co- 
lumbia). In the United States National Museum, 13 females, 1 
male. 
This species is remarkably like Tabanus hirsutus Villers of the 
mountains of central Europe, and it may be that they are the same 
in spite of the broad gap in distribution, which may be due to 
insufficient collecting in the mountains of Asia. Hine studied the 
type of Diachlorus haematopotides Bigot and confirmed Ricardo’s 
statement concerning the synonymy. The writer has examined the 
type of 7. fratellus. 
TABANUS SPARUS Whitney 
(Fig. 27, 0) 
Tabanus sparus Whitney, Canad. Ent. 11: 38, 1879; Williston, Kans. Acad. 
Sci. Trans. 10: 140, 1887; Bequaert, Boston Soc. Nat. Hist. Oceas. Papers 
8: 86-87, 1933; Philip, Bull. Brooklyn Ent. Soc. 31: 194-195, 19386. 
Small; brownish black, with three rows of gray spots on abdomen; frons 
rather narrow, widened above; median callus a slender line; second palpal seg- 
ment swollen basally, but tapering to a sharp apex. 
Female.—Length 9-11 mm. Hye bare, green, with a purplish reflection and, 
in specimens from southern portion of range, with a narrow, diagonal, purple 
band (see subspecies milleri). Frons brownish gray, five times as high as 
width across basal callus, widened above; basal callus dark brown, small, 
square or slightly higher than wide, touching neither eyes nor line between 
frons and subeallus; median callus a slender black line or elongate spot, usually 
longer than basal callus; vertex usually completely pollinose; subcallus and 
upper genae brown. Antenna orange brown, the first two segments with black 
hair; basal portion of third rather short and stout, with a distinct dorsal 
angle but no excision; annulate portion stout, about equal in length to width 
of basal portion. Clypeus and lower genae grayish white, with white hair. 
Second palpal segment creamy white, with concolorous hairs and a few black 
ones, stout at base and tapering to a sharp point. 
Mesonotum blackish, with faint stripes in usual pattern and a mixture of 
black and orange hair; prescutal lobe yellowish brown. Pleura, sternum, and 
coxae gray, with whitish hair. Wing hyaline, venation normal. Femora gray 
tinged with reddish brown; tibiae yellowish brown, the apical half of fore 
tibia and extreme apices of others darkened; tarsi dark brownish black. 
Abdomen dark brownish black, with light-yellowish-gray median triangles 
and a sublaterai row of small spots of same color; sublateral spots on tergites 2 
and 8 usually, but not always, touching hind margin more or less broadly; a 
narrow posterior border of gray pollen on all tergites; venter gray, with paler 
incisures. 
Male.—Not positively identified. See 7. pumilus, p. 76. 
Type.—A lectotype female, labelled and herein designated, one of 
two cotype females in the Museum of Comparative Zoology (No. 
4039). A third cotype is in the collection of the Boston Society of 
Natural History. 
