226 Mr. E. E. Austen 07i new 



margins of tliird and fourth segments, on each side of median 

 spot, narrowly grey; venter greyish poUinose, basal portion 

 of segments usually brownish ; last two segments clothed 

 with erect black liair, remainder with short, more or less 

 appressed, whitish hair. Winys with a brownish tinge ; 

 stigma well defined, brown ; squarnce dark brown. Halteres 

 brown, knobs somewhat lighter. Legs clove-brown ; tibiae, 

 except tips, cream-coloured and clothed with whitish hair ; 

 second, thiid, and fourth joints of front tarsi strongly 

 expanded. 



Angola: type and five other specimens from the Chiyaka 

 district, March 1906 {Dr. F. Creighton Wellman). I 

 have much pleasure in naming this species after its dis- 

 coverer, who states that it is a '' pertinacious biter,^^ and 

 was " taken in a thick jungle " *. 



This and the following species are allied to Tabanus insignis, 

 Lw., but present still closer resemblance to a new species 

 which occurs in French Congo (Gaboon), and will shortly 

 be described by M. Surcouf, of the Museum d'Histoire 

 Naturelle, Paris, under the name of Tahanus argenteus. 

 From this species T. ivellmanii is distinguished by the 

 presence of the pearl-grey stripes on the thorax, by the 

 band of silvery pile on the hind border being much less 

 deep, by the scutellum being for the most part bluish grey 

 instead of dark brown except at the base, and by the 

 abdominal spots not being semicircular and their transverse 

 diameter being much less : the width of each spot is less 

 than that of the space between it and the lateral margin of 

 the segment, instead of greater, as in T. argenteus. 



Tabanus sharpei, sp. n. 



$ . — Length (1 specimen) 11*5 mm. ; width of head 

 4 mm.; width of front at vertex 0"6 mm. ; length of wing 

 9*25 mm. 



Closely resetnbling foregoing species, but distinguishable by 

 the abdominal markings and icider front. — Clove-broivn ; 

 front pearl-grey ; thorax uith a pair of narrow, well-defined, 

 pearl-grey stripes, ending just beyond transverse suture, and 

 hind hnrder pearl grey, clothed with silvery pile ; abdomen 

 with sides of first segment, a large quadrate blotch on posterior 

 angles of second, and a doubly emarginate cross-band on hind 



* For description of Chrysops ivellmanii, Austen, discovered by 

 Dr. Wellinan in the same district and at the same time, cf. Austen, Ann. 

 & Mag. Nat. Hist. ser. 7, vol. xx., Dec. 1907, pp. 512-513. 



