Tabanus nugacepkalus, Jaenn., Berl. Ent. Zeitschr., X, p. 82, 1866. 



Kertesz, Cat. Dipt., Ill, p. 236, 1908. 



'Medium-sized blackish species with broad frontal stripe which 

 contains two large roundish separate calli, with distinct three rows 

 of small grey spot on the dorsal abdomen, with wholly dusted frontal 

 triangle, with blackish antennae and legs, and with clear wings. 



Female. Head large, distinctly broader than the thorax, mode- 

 rately arched. Frontal stripe yellowish ashy grey or brownish ashy 

 grey, a little darker above, very broad, broadest just above the upper 

 frontal callus and gradually but very slightly contracted towards the 

 eye-angles, and about two and a half times as long as its broadest 

 part or about three and a half times as long as its narrowest part ; 

 pubescence on the frontal stripe about down to the lower callus short, 

 black and proclinate, and usually suberect pale on the lower part or 

 sometimes on the lower sides only, the black pubescence being slightly 

 longer on and about the vertex with much longer grey hairs intermix- 

 ed, and behind the vertex are some much more longer black hairs 

 which have their tips bent forwards ; lower frcn a I callus shining black, 

 large and slightly convex, transverse oblong or sometimes square, 

 resting just above the frontal triangle, and only separated from the 

 eyes by narrow grey lines ; upper frontal callus black and slightly 

 shining, flat and irregularly longitudinally striate, broad, usually heart- 

 shaped being notched above, separated from the lower callus by a 

 rather dusted space or very rarely connected below by a short point 

 with the lower callus; vertex somewhat triangularly dark grey, without 

 any ocellar tubercle ; frontal triangle rather short and broad, wholly 

 covered with a yellowish grey tomentum, with a brown cross-band 

 extending across from eye to eye both above and below the antennae 

 and continuing somewhat down the cheeks against the eyes. Face wholly 

 obscured by an ashy grey tomentum which becomes slightly yellowish 

 on the epistoma or brownish on the cheeks above, covered with rather 

 long and dense whitish hairs, which become shorter above and are 



