76 MISC. PUBLICATION 305, U. 8. DEPT. OF AGRICULTURE 
stout, only slightly longer than broad and little, if at all, excised beyond dorsal 
angle; annulate portion shorter than width of basal portion. Clypeus and 
lower genae light gray, with white hair. Palpus creamy white, with white 
and black hair, the second segment moderate in width, tapering, but the apex 
rather rounded. 
Mesonotum brownish black, with gray longitudinal stripes in usual pattern. 
Humeral and prescutal lobes yellowish orange. Pleura, sternum, and coxae 
gray tinged with yellowish, with white hair. Wing hyaline; vein R; sometimes 
with short stump. Legs orange brown, the femora Sometimes distinctly gray- 
ish; fore tibia with apical half blackish; middle and hind tibiae with apices 
usually darker; fore tarsus darker than others. 
Abdomen brownish black, with cream-colored markings consisting of very 
narrow posterior margins to tergites, a faint median row of triangles, and 
sublateral rows of round spots completely surrounded by the dark-brown 
color; venter gray tinged with reddish. 
Male.—Areas of large and small facets of eye sharply differentiated, the 
former extensive. Body coloration essentially as in female. 
ae Es 
FIGURE 27.—Antenna, front view of head, and palpus of (4A) Tabanus pumilus, (B) 
T. fratellus, and (C) T. sparus. 
The writer has been unable to distinguish surely the male of this 
species from that of Tabanus sparus, although fresh specimens should 
show a difference in eye pattern. The frontal and palpal characters 
of the female, which separate the two species, are lacking in this sex. 
Type.—Female, collection unknown. 
Type locality — Carolina.” 
Distribution—Central New York and Maine to Florida and west 
to Arkansas. March 26 (Silver Springs, Fla.) to August 18 (Lime, 
Conn.). In the United States National Museum, 64 females. 
TABANUS FRATELLUS Williston 
(Fig. 27, B) 
Tabanus fratellus Williston, Kans. Acad. Sci. Trans. 10: 140, 1887; Hine, Ohio 
Nat. 5: 237, 1904; Philip, Bull. Brooklyn Ent. Soc. 31: 192, 1936. 
Diachlorus haematopotides Bigot, Mem. Soc. Zool. France 5: 624-625, 1892. 
Small; black, with three rows of small gray spots on abdomen, the median 
row often indistinct; third antennal segment with scarcely any dorsal angle. 
Female—Length 10-11 mm. Eye bare, purplish, with four green-blue, di- 
agonal bands. Frons gray, three and one-half to four times as high as width 
at base, somewhat widened above; basal callus shiny brownish black, nearly 
square, and not quite touching eyes; median callus of same color, not quite 
so shiny, nearly as large as basal callus and connected with it at most by a 
narrow line; vertex often somewhat denuded, black; subcallus gray, the supra- 
antennal crescents unusually wide, yellowish. Antenna reddish brown, the 
first two segments and annulate portion of third usually darker; basal por- 
tion of third segment with a very low, obtuse, dorsal angle, its greatest width 
about five-eighths of its length; annulate portion about as long as width of 
basal portion. Clypeus, genae, and subcallus whitish, with concolorous hair. 
Second palpal segment rather slender throughout, pale yellowish, with black 
and white hair. 
Mesonotum, including prescutal lobe, black, with gray lines in usual pattern; 
rest of thorax and coxae grayish, with white hair. Wing hyaline, with dark- 
brown veins, the venation normal. Legs blackish, the basal half of fore tibia 
and all but apices of others yellowish brown. 
Abdomen black, with three rows of gray spots and each segment with a 
narrow posterior band; median spots small, occasionally joined to form a 
