66 MISC. PUBLICATION 305, U. S. DEPT. OF AGRICULTURE 
except third segment beyond dorsal angle, which is black; first two segments | 
with black hair, the first somewhat enlarged above; second with strong dorsal 
process; basal portion of third short and stout, the dorsal angle strong and © 
excision shallow. Clypeus and genae gray, with mostly white hair. Second — 
ea segment stout, rather long, pale pinkish, with mixed white and black | 
air. h 
Mesonotum dark gray, with brownish prescutal lobe, paler gray lines in| 
usual pattern, recumbent rusty hair, and erect black hair. Pleura, sternum, | 
and coxae gray, with white hair. Wing entirely hyaline, with black veins, the © 
venation normal. Femora gray, with white hair; tibiae pale reddish, with | 
white hair except the black apical half of fore tibia and darkened apices of 
others; hind tibial fringe white except at apex; tarsi dark brownish black. : 
Abdomen gray tinged with reddish, with a row of faint, pale-grayish, median 
triangles and sublateral, oblique, gray spots on tergites 2-5, the latter not 
reaching the hind margins of tergites; venter dark grayish red, with a broad, | 
nearly black, median stripe. 
Ficure 21.—-Antenna, front view of head, and palpus of (A) Tabanus pruinosus and 
(B) T. fulvicailus. 
Male.—Areas of large and small facets of eye not strongly differentiated, the | 
latter extensive and widely surrounding the larger facets; antenna black, the 
first segment distinctly enlarged; second palpal segment cream colored, stout, 
with apex acute. Coloration otherwise as in female. 
Type.—Male; in the British Museum, according to Hine, although | 
recent search failed to discover it. 
Type locality.—Mexico. 
Distribution —Utah to Guatemala. May (Jemez Spring Moun- | 
tains, N. Mex.) to July 29 (Tucson, Ariz.). ! 
Hine, in his unpublished notes made at the British Museum, claims: 
to have studied the type and places his Zabanus limpidipennis as a 
synonym. | 
This species is very close to fairchildi, n. sp., but the first antennal | 
seoment of the female is not quite so enlarged, the third segment has 
some reddish basally, and the sublateral gray spots on the abdomen | 
of the male are less extensive than in fatrchildi. | 
TABANUS FULVICALLUS Philip 
(Fig. 21, B) 
Tabanus fulvicallus Philip, Minn. Agr. Expt. Sta. Tech. Bull. 80: 106-107, 1931; | 
Fairchild, Boston Soc. Nat. Hist. Occas. Papers 8: 148, 1984; Stone, Ent. | 
Soe. Wash. Proce. 37: 17, 1935. 
Rather small to medium sized; brownish, with three rows of pale spots on| 
abdomen; third antennal segment mostly blackish brown, the extreme base and | 
last annulus paler. 
Female—tLength 11.5-16 mm. Eye bare. Frons gray tinged with yellow, | 
slightly more than four times as high as wide, with parallel sides; vertex. 
notched, slightly swollen, and sometimes denuded in front of notch, but with no | 
ocellar tubercle; basal callus rather small, narrowly separated from eyes, and | 
tapering to the slender, raised, median callus; subcallus pale yellowish brown, | 
rather flat. Antenna with first two segments, extreme base of third, and last’ 
