Mr. C. G. Lamb on Exotic Chloropidae. 393 



TRICIMBA, Lioy. 

 (Notonautax, Becker.) 



Tricimba setosa, sp. n. 



A remarkably bristly form, with an unusually shaped 

 scuiellum. 



Head (top view): — In general appearance and colour very 

 like T. Uneella ; frons dull orange, triangle ill-defined and 

 brown, the base extending across frons at about level of front 

 verticals, the point extending to midway between front 

 ocellus and forehead ; the bristles are very strong, two parallel 

 anterior f.-o., the first the smaller, stout inner verticals far 

 forward, just beyond ocelli (possibly really the upper f.-o.) ; 

 strong convergent post-verticals placed on vertical ridge just 

 behind the hind ocelli, and strong parallel ocellars just in 

 front of these ocelli ; all the bristles are black. Face orange, 

 as are the antenna?, except for the tiny black tip of the 3rd 

 joint ; arista almost black, long, fully l£ times as long as in 

 Uneella, with long basal joints and faintly pubescent flagellnm. 

 Side-view : jowls all orange, considerably deeper than Uneella, 

 about 1^ times the depth of 3rd joint; orange vibrissa; 

 palpi thick and orange, as is the tongue. Hind head grey, 

 dusted with brown; two fine divergent orange lines from 

 neck to vertex. 



Thorax much the same in colour and dusting as in Uneella, 

 but with somewhat brighter pollen ; the punctured lines 

 quite the same in character, the middle one with single- 

 rowed punctures, side ones double-rowed, though not so right 

 to the front ; callus orange ; the bristles present are as in 

 Uneella, not short and orange as in that species, but quite 

 long, stout, and black. Scuiellum subtriangular, with flat 

 disc, similar to dorsum, but orange at tip; terminal bristles 

 parallel, black and very long, with a shorter black one on 

 each side; pleura dark orange, dusted except behind front 

 coxa. 



Wings in general appearance very like those of Uneella, 

 but the venation differs as follows: — Last cross-vein not 

 sloped, nearly perpendicular, considerably more remote from 

 the small cioss-vein ; end of 2nd much nearer end of 3id. 

 Halteres pale yellow. 



Legs entirely yellow, except for claws. 



Abdomen dullish orange-black, brighter towards sides. 



Size 3 mil). 



Natal: Durban (F. Muir) ; S. Rhodesia: Salisbury 

 {G. A. K. Marshall). 



