424 Mr. F. W. Edwards on 



more or less suffused with reddish ochraceous and the 

 abdominal segmental margins very narrowly of that colour; 

 a pale fuscous spot at base of membrane; second and fourth 

 joints of antennae longest and subequal in length, each 

 distinctly longer than third ; pronotum very indistinctly 

 longitudinally carinate ; membrane scarcely or very slightly 

 extending beyond abdominal apex. 



Long. 10-12 mm. 



Hab. Uganda Prot. (C. C. Gowdey), Buamba Forest, 

 Semiliki Valley, 2300-2800 ft,, Mpanga Forest, Toro, 

 4800 ft., and Daro or Durro Forest, Toro, 4000 to 4500 ft. 

 (S.A. Neave). 



In some varieties the anterior black margin of the pro- 

 notum is much enlarged and extends to and absorbs the 

 two small anterior spots, in other specimens again these 

 pronotal spots are entirely absent. 



[The types and other specimens described or referred to in 

 this paper are all contained in the British Museum.] 



LII. — Two new Dipt era from Trinidad. 

 By F. W. Edwards. 



The two species diagnosed below were sent me for deter- 

 mination by Mr. C. B. Williams, who, in company with 

 Mr. F. W. Uiich, collected them at Guacharo cave, Trinidad 

 — the Trickobius on an undetermined bat, the Tipulid on the 

 walls of the cave. Co-types of the former and the type of 

 the latter have been presented by the collectors to the British 

 Museum ; further reference to them will be made in their 

 forthcoming paper on the cave fauna. 



Trickobius earns, sp. n. 



Eye-spot unfacetted. Mesonotum uniformly covered with 

 rather short bristles, those on the front margin not longer 

 than the rest. Scutellum with four long bristles. Longi- 

 tudinal suture of the mesonotum short, bifurcated behind, 

 extending barely one-third of the distance from the front 

 margin to the transverse suture. Anterior angle of meta- 

 sternum about 95°. 



Length 1*8 mm. 



According to specimens in the British Museum from Basin 



