African Species of the Genus Clirysops. 513 



second and lateral margins of third and following segments 

 dark brown ; on ventral side fifth and following segments 

 usually dark brown, hinder portion of fourth segment often 

 more or less brownish ; abdomen clothed above with short 

 yellowish or whitish hair, beneath with short whitish hair, 

 sides fringed with long" whitish hair. JVinr/s : bases as well 

 as extreme tips of first and second basal cells blackish brown ; 

 apical blotch narrow, extending from the u])pcr end of the 

 distal margin of the transverse band to a little way beyond 

 the termination of the upper branch of the third longitudinal 

 vein ; distal margin of transverse Ijand somewhat irregular, 

 commencing on the costa a little beyond the level of the fork 

 of the third vein, and terminating at the tip of the anal cell ; 

 in the fourth and fifth posterior cells it is somewhat indis- 

 tinct, and less sharply defined than above ; proximal margin 

 of the transverse band commencing at the base of the third 

 and running at right angles to the eosta almost straight 

 down to the sixth vein, sometimes with a slight backward 

 projection at the upper inner angle of the fifth posterior 

 cell ; veins in hyaline area on basal side of transverse band 

 pale (cream-colour) ; veins beyond transverse band also partly 

 pale. Ha / teres hvow'u. Legs: front tibiie alone incrassated, 

 indistinctly reddish at the base. 



Angola : type and four other specimens from the Chivaka 

 district, March 1906 {Dr. F. Creiyhton IVellman). 



The species was met with in thick bush, where antelope 

 abound, and Dr. Wellman states that it " is very agile and 

 goes for one's eyes.'' When forwarding these specimens 

 and examples of a new species of Tabanns, which will shortly 

 be described, the donor wrote: — "These are probably the 

 first insects ever collected in Chivaka district.-" I am glad 

 to be able to associate with this extremely pretty species the 

 name of its discoverer, who, although professionally engaged 

 in another department of science, owing to his energy and 

 enthusiasm as a collector of Diptera has, during the last 

 three years, enriched the National Collection with examples 

 of many interesting new species from Portuguese West 

 Africa. 



By its remarkable coloration C. U'cl/inanii is easily distin- 

 guishable from any of its congeners known to me from any 

 part of the world. 



C/tri/sops Brucei, sp. n. 



% . — Length (8 specimens) 8 to9r| mm. ; width of head 2i 

 to 3mm.; width of front at vertex % mm.; length of wing 

 7^ to 9 mm. 



