42 On Wasps of t lie Genus Tacliytes. 



area more broadly rounded at the apex, but do not seem to 

 differ otherwise. 1 have seen no males from these localities. 

 The species is easily distinguished by the slender form and 

 the sculpture of the thorax and median segment. 



51. Tuchyies silverlocki, sp. n. 



$. Xigra ; fronte, clypeo pronotoque argcnteo-pubescentibns ; 

 mesonoto lateribus, segment iscjue dorsalibus 4 basalibiis fascia 

 apicali griseo-argenteo-pubescentibus ; seginento mediano lateri- 

 bus pleurisque albo-pilosis ; tarsis articulis duobus apicalibus, 

 arliculis -'^cundo tcrtioque basi, calcanbusque ferrugiiieis ; 

 pygidio aureo-pubescenie ; alls hyaliuis, venis I'uscis. 



Loug. 9-10 mm. 



? . Clypeus very broadly rounded at the apex, the margin 

 narrowly depressed ; vertex without distinct punctures. 

 Eyes separated on the vertex by a distance fully equal to 

 the combined length of the two basal joints of the flagellum. 

 ]Median segment moi'e than half as long again as the 

 scutellum, without a median sulcus on the dorsal surface, 

 except at the extreme apex. Pygidial area subtriangular, 

 very narrowly rounded at the apex ; second sternite stib- 

 opaque, closely microscopically punctured. Basal joint of 

 the fore tarsus with five whitish spines. Third abscissa of 

 the radius a little longer than tlie second, the latter a little 

 longer than the space between the recurrent nervures on the 

 cubitus. Third cubital cell long and narrow, reaching on 

 the cubitus much further than the apex of the radial cell. 



Hab. N. Rhodesia, Pakasa (0. Silverlock), January ; 

 British E. Africa, Kistimu (S. A. Keave), April. 



This little species is very near the Egyptian T. camer- 

 oniana, Morice, of which only the male is known ; but as 

 the colour of the tarsi and nervures as well as the details of 

 neuration differ, I do not think that it is the female of that 

 species. 



*52. Tachytes iiigroannulata. Bisch. 



Tachytes nigroanmdatiis, Biscli. Arch f. Naturges. A. 3, p. 69 (1913). 



6. 



Hab. S. Rhodesia, Springvale ; December. 

 Tins seems to be allied to T. silcerlocki, but I do not 

 think it can be the male of that species. 



Liris diabulica. Sm. 

 Larrada diabolica, Sm. Ann. & Mag. Nat. Hist. (4) xii. p. 294 (1873). 



