HORSEFLIES OF THE SUBFAMILY TABANINAE 22 
about two and one-half times as high as wide, the sides parallel; no calli or 
ocellar tubercle. First two antennal segments yellow, with yellow and some- 
times blackish hair; third orange yellow, short and stout basally, with a blunt 
dorsal angle and no excision, the basal portion three-fourths as broad as long 
to as broad as long; annulate portion short and stout, with only three distinct 
annuli. Palpus yellow, second segment stout, with a rather blunt apex and 
long, erect, yellow, and blackish hair. 
Thorax and coxae dark gray, with whitish hair. Wing hyaline, with yellow- 
ish veins; venation normal. Legs yellowish brown, with yellowish and blackish 
hair; all femora somewhat darkened at base. 
Abdomen nearly uniformly brownish black, the sides of tergites 1 and 2 some- 
times yellowish brown. 
Male.—Kye densely pilose, the areas of large and small facets rather dis- 
tinctly differentiated. Coloration essentially as in female, but sides of tergites 
1-3 nearly always yellowish. 
S28 iy 
FiGgurRE 7.—Antenna, front view of head, and palpus of (A) Atylotus ohioensis, 
(B) A. pemeticus, and (C) A. thoracicus. 
Cotypes.—F ive males and three females, Ohio State University and 
United States National Museum No. 5339. 
Type locality —Ohio. 
Distribution—Ilowa to New York. June 8 (Lafayette, Ind.) to 
July 31 (Mclean, N. Y.). In the Unit:d States National Museum, 
four females, eight males. 
ATYLOTUS PEMETICUS (Johnson), new combination 
(Higs7,, °.B)) 
Tabanus pemeticus Johnson, Boston Soe. Nat. Hist. Occas. Papers 5: 11-12, 1921. 
Rather small; brownish; pleura grayish; palpal hair predominantly black; 
no frontal calli. 
Female.—Length 10-13 mm. Eye with short pile and a narrow, purplish, 
diagonal stripe. Frons yellowish brown, with mostly black hair, three to 
nearly four times as high as wide, with no calli or ocellar tubercle. Subcallus 
concolorous with frons, Somewhat flattened. First two antennal segments yel- 
low, with black hair; third yellow orange, the dorsal angle distinct but obtuse 
basad of middle; annulate portion slightly shorter than width of basal portion. 
Clypeus and genae grayish, with white hair, at least the upper genae tinged 
with yellow. Palpus pale yellowish to white, the hair of first segment mostly 
white, of second mostly black; second stout basally, tapering to acute apex. 
Proboscis yellowish to brown. 
Dorsum of thorax blackish brown, with erect black hair and recumbent 
yellowish hair; prescutal lobe paler brownish. Pleura, sternum, and coxae 
gray, with white hair. Wing hyaline; costal cell pale yellowish; veins apically 
dark brown; vein R;s usually angulate basally or with a stump vein. Legs 
yellowish brown, with black hair, the fore tarsus darkened apically. 
Abdomen dark brown above, somewhat yellower on sides of first two tergites, 
with black and yellow-orange hair; venter paler, gray at least basally, with the 
hair white or pale yellowish. 
Male.—Hye densely pilose, the areas of large and small facets well differen- 
tiated; second palpal segment rather stout, the apex acute. Femora black, 
somewhat yellowish apically; apex of fore tibia and fore tarsus blackish. 
Coloration otherwise essentially as in female. 
Type.—Female, in the collection of the Boston Society of Natural 
History. Allotype and two paratypes in the collection of the Boston 
