378 



middle, as in the other Tabanus. 



Length : 20-25 mm. 



Male. Very much like the female, but the abdomen usually 

 reddish brown. 



Head somewhat large, not apparently broader than or sometimes 

 as wide as the thorax, and longer than its half, arched. Frontal 

 triangle pale greyish yellow or white, so conspicuously darkened at the 

 top part as there is a blackish brown band, sometimes very slightly 

 concave about the middle, the median fine sulcus very short and only 

 existing on the lower third or half, and with two or three irregular 

 oblique depressions each on side of the median line. Face pale greyish 

 yellow or orange yellow ; epistoma somewhat triangular, deeply sunk 

 from the cheeks, with a large triangular depression in the middle, 

 and bearing no pubescence ; cheeks nearly the same in width through- 

 out, inflated but 'not apparently raised from the eye-margins, much 

 yellowish at the upper top and along the eye-margins, covered with 

 numerous moderately long soft brownish or yellowish brown pubescence 

 which is sometimes intermixed with some scattered inconspicuous black 

 hairs about the upper half near the eye-margin, and which extends 

 below to the jowls, at where it becomes longer somewhat shaggy, 

 and paler ; back of the head paler than the face, shallow on the lower 

 part but hollowed out on the upper part, bearing some scattered 

 whitish pubescence, but the longish pubescence behind the extreme 

 lower part similar to that on the jowls ; the postocular bare rim very 

 narrow, gradually but slightly widened below to the jowls, not seen 

 from above, behind which is a single ciliation of short black bristly 

 hairs;, vertex very small, yellowish brown or brown and bearing a few 

 short blackish postvertical pubescence which is usually shorter than that 

 of the postocular ciliation. Proboscis small, blackish ; stalk shorter than 

 the sucker-flaps, clothed with dense black or mixed brownish and black 

 hairs behind ; the sucker-flaps stouter, furnished with mixed black and 

 yellowish brown bristly hairs beneath. Palpi reddish yellow, dull ye low 



