226 Miss S. L. M. Summers on Blood-sucking 



Abdomen reddish brown ; distal segments darker, with 

 scattered hairs, of wliich many are black and a few goklen. 



Tliis s{)ecies can be readily distinguished from T. desteem 

 by the parallel-sided and mucli narrower front, by the shape 

 of the frontal callus^ by the very much longer palps, and by 

 the nearly uniformly coloured abdomen, 



Tabanus anellosus, sp. n. 



Small species^ length 9 mm. 



Five females. 



Face grey, with long white hairs. Palps reddish yellow, 

 slender, about two-thirds the length of the 2^roboscis, which 

 is black and remarkably slender. 



Antennce reddish brown, the rings of the third segment 

 black, and the basal tooth acuminate. 



Front uniformly narrow, one-ninth the breadth of the liead, 

 dirty yellow; frontal callus elongate triangular, shiny black. 

 Eyes quite bare. 



Scutum and scutellum bhack, with grey dust and scattered 

 hairs, black and a few golden. 



Legs : femora and tarsi of all the legs black ; tibiae of the 

 first pair black with red base, tibiss of the second and third 

 pairs reddish brown with black tip. 



Wings hyaline, with a long brown mark at the distal end 

 of the first longitudinal vein. Halteres dark brown. 



Abdomen : the first three segments of a reddish-brown 

 colour, the second having a small black median triangle ; 

 the remaining segments black. At the hinder edge of each 

 segment is a row of golden hairs, which on the black segments 

 form distinct fine cross-bands. 



Silvius mansoni, sp. n. 

 Length 11-6-13 mm. f 



Four females. ... i 



Face grey, with long white or yellowish-white hairs ; }mlps [ 



a little more than three-quarters the length of the proboscis, 

 extremely slender, reddish brown with black abruptly truncate 

 tip ; proboscis black, long and slender. 



Antenna} reddish brown, third segment broadly triangular 

 at base and then becoming very slender. _ | 



Front wide, about one-sixth the width of head, shghtly ♦ 



convergent anteriorly, dirty yellow\ Frontal callus shiny 

 black, divided into two parts— the upper elongate triangular, 

 almost racquet-shaped, prolonged to the ocelli which are very 

 distinct ; the lower a large shiny black plug. Fi/es quite 

 bare. 



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