34 THE KNT0M0L0GI8T. 



smoky, the stigma dark testaceous, the costa and other nervures 

 black. 2 . Length 11 mm. 



Kuching. October (J. Hewitt). 



Head and thorax closely strongly punctured, the head more 

 strongly than the latter. Antennae from the third joint flattened, the 

 third narrowed, of equal width. Pubescence longer and denser on 

 the front than on the rest of the head. Antennse 14-jointed, the 

 joints towards the apex bearing short stiff black hairs. Ovipositor 

 short, narrow. 



T. iiisularis, Sm. from Sarawak I do not know, but from the 

 description I would separate it from the present species thus : — 

 Apical joints of antennae yellow, only the first two and 

 the last abdominal fascias interrupted, the others 

 continuous ........ insularis. 



Antennas entirely black, the abdominal marks all widely 



separated . ....... viridiceps. 



SOME BEES COLLECTED BY DK. F. C. WELLMAN IN 

 WEST AFRICA. 



By T. D. a. Cockerell. 



Mesotrichia chiyakensis, sp. nov. 

 2 . Length, 30 mm. or a fraction less ; anterior wing about 

 26 mm. ; width of head, 10^ mm. Black, with bright lemon-yellow 

 hair on the mesopleura, the hind margin of thorax, and the first 

 abdominal segment ; hair of face and anterior part of thorax, and 

 also of legs and abdomen except first dorsal segment, coarse and 

 black. Vertex broad, shining, with very sparse but strong punc- 

 tures ; frontal keel low, grooved, not nearly reaching clypeus ; third 

 antennal joint longer than 4 + 5 ; mesothorax densely punctured at 

 the sides, the disc smooth and impunctate ; wings exceedingly dark. 



Hab. Chiyaka, Benguella, West Africa, September 1st, 1907 ; 

 at flowers of mint (F. C. Wellman, 1239). 



A very fine species, of the general type of Mesotrichia caffra 

 (L.), but larger, and with yellow hair on the pleura. It belongs 

 to a little group typified by M. inconstans (Smith), separable 

 thus : — 



Length, 26-26 mm. ; anterior w^ing, 21-23 mm. . 1. 



Length, 30 mm. ; anterior wing, 26 mm. ; scutellum 



with yellow hair M. chiyakensis, Ckll. 



1. Scutellum and first abdominal segment with white 



hair (Abyssinia, White Nile, Tanganyika) M. inconstans (Sm.). 

 Scutellum with yellow hair (Senegal) . M. flavescens (Vachal). 



In 1881 Radoszkowski recorded M. inconstans from Humbe, 

 to the south of Benguella. That this was the genuine inconstans 

 1 cannot believe ; it may possibly have been chiyakensis. 



