500 Mr. G. Meade- Waldo's revision of the species of 



towards tegulae. Postscutellum and median segment truncate, the 

 latter concave medially, its lateral angles rounded. First abdominal 

 segment bell-shaped, widening posteriorly, narrower than second at 

 base. Wings clear hyaline, slightly fuscous on part of costal area 

 and in radial cell, cj differs only sexually, tlagellum black. 

 Length 7 mm. 1 $, 2 ^^ J. 



S.E. Congo Free State : Lufira R., Katanga, 3500 ft. ; 

 Lualaba River, v. 1907 (2 (^(^); Kambove, Katanga, vi. 

 1907 (4000-5000 ft.), $ (type), {S. A. Neave). 



0. (Ancistrocerus) neavei, sp. n. 



^. Niger; clypeo basi excepto, mandibulis, maculis inter antennas 

 et post oculos, pronoti margine antico plus minusve, segmentisqiie 

 abdominalibus 1 et 2 fasciis apicalibus, luteis. Capite, thorace 

 tegulis exceptis, segmentoque abdominali primo plerumque rugose 

 punctatis ; tegulis segmentisque 2-7 vix punctatis. Alis infuscatis, 

 ampliatis. Long. 11 mm. 



Head, thorax, and first segment of abdomen with a long, somewhat 

 sparse, covering of griseous pubescence, rest of abdomen with a 

 dense short silvery pubescence on the ventral surface. Wings very 

 ample. 



Clypeus as broad as long, narrowly produced towards apex, which 

 is deeply emarginate. Head about as broad as thorax at widest. 

 Terminal joint of antennae forming a hook. Anterior margin of 

 pronotum truncate, the pronotum widening towards the tegulae. 

 Scutellum flat, divided from the postscutellum by a distinct 

 transverse groove, postscutellum subtruncate, raised ; median 

 segment with a short dorsal area, the sides of the truncation 

 rounded and produced to form blunt lateral tubercles. Surface 

 of the truncation finely trans-striate. Head, thorax, except 

 tegulae, and the surface of truncation of median segment, and 

 abdominal segment 1 posterior to the transverse carina, regu- 

 larly and deeply punctured; the rest shining, finely punctured. 

 Abdomen slender, a slight constriction between segments 1 and 2. 



$ differs from male only sexually ; clypeus black, with 4 yellow 

 marks, the basal pair minute, medio-lateral, the apical pair elongate 

 almost reaching the apex, whicli is truncate ; mandibles black, 

 except for a minute yellow mark at base. The wmgs in the $ very 

 ample. 



Length 11 mm. 2??, 1^. 



Uganda Protectorate : N. Ruwenzori (6000-8500 ft.), 

 Nov. 1911 (type c?) and $ {S. A. Neave); Ruwenzori 



