HORSEFLIES OF THE SUBFAMILY TABANINAEK 65 
Distribution.—A lberta and Nova Scotia to Colorado and New Jer- 
sey. May 26 (Lyme, Conn.) to August 18 (Macdiarmid, Lake Nipi- 
_ gon, Ontario). In the United States National Museum, 22 females, 
| 3 males. 
TABANUS EURYCERAS Philip 
Gigs" 205.8.) 
Tabanus euryceras Philip, Pan-Pacific Ent. 13: 66-67, 1937. 
| Rather small; grayish, with three rows of spots on abdomen; eye bare; 
| third antennal segment with very stout orange basal portion and black annulate 
portion. 
| Female.—Length 12 mm. Hye bare. Head gray, the frons and subcallus 
| tinged with yellow. Frons about four times as high as width at base, dis- 
_tinectly widened above; basal callus dark orange brown, subquadrate; median 
callus black, narrowly joined to basal callus; vertex with a somewhat denuded 
| spot but no ocellar tubercle. Antenna orange, the annulate portion of third 
segment black; first two segments with black hair, the first slightly swollen 
above; second with a strong dorsal process; basal portion of third very stout, 
with no dorsal excision, the width nearly as great as the length. Clypeus and 
| genae with white hair. Second palpal segment very stout basally, tapering to an 
acute apex, pale yellow brown, with a mixture of whitish and black hair. 
_ Mesonotum blackish, with rather distinct grayish lines in the usual pattern ; 
| prescutal lobe and area above wing base reddish brown; pleura, sternum, and 
| coxae gray, with white hair; wing hyaline, veins brown, venation normal. 
Femora gray; tibiae yellowish brown, the apical half of fore tibia blackened ; 
hind tibial fringe a mixture of black and white; tarsi orange brown to black, 
the fore pair darkest. 
Abdomen grayish above, the sides tinged with dull reddish; a median row of 
small grayish triangles arising from pale bands on hind margins; a row of 
| subloteral, oblique spots on each side extending length of tergites; venter dull 
Morange brown. 
| Mele--Areas of large and small facets of eye sharply differentiated, the 
| former sith short pile; vertex- with thin gray pollen and with hair over entire 
surface. Upper third of frontal triangle brown, the rest gray. Palpus yellow- 
-ish. with mostly white hair, the second segment about twice as long as thick, 
| with Diun apex. Claws of fore tarsus subedqual. Coloration of body essen- 
| tintly as in female. 
_ Jyper--A female in the collection of the University of Kansas. 
Alistype and paratype male in the collection of the University of 
-Kensas: paratype female in the collection of the University of Ari- 
“gor; paratype male and paratype female in the collection of C. B. 
|), ep Pelee Phage 
) 2+ up 
i ype vocality—Santa Rita Mountains, Ariz: 
| Distribution—Arizona. June 12 (Santa Rita Mountains) to Au- 
gust (southern Arizona). 
| 
TABANUS PRUINOSUS Bigot 
(Fig. 21, A) 
| Tabanus pruinosus Bigot, Mem. Soc. Zool. France 5: 683-684, 1892. 
Tabanus limpidipennis Hine, Ohio Nat. 8: 223, 1907. (New synonymy.) 
Medium sized; dark grayish brown, with three rows of small grayish spots 
on abdomen; wing entirely hyaline; third antennal segment mostly black; 
_palpus stout, pale pinkish. 
| #emale.—Length 16-17 mm. Eye bare or finely pilose, with two green 
bands. Frons gray tinged with yellowish brown on each side of median callus, 
slightly over three and one-half times as high as width at base, somewhat 
widened above; basal callus chestnut brown, subcircular, not quite touching 
eyes; median callus black, narrowly joined to basal callus, short and often ill 
defined; a pair of small yellowish-brown spots at vertex, but no ocellar tubercle. 
Subcallus orange brown covered with yellowish pollen. Antenna orange brown 
38521 °—38——_5 
