110 On new Species of Diphptera. 



RlIYNCHALASTOR, gen. UOV. 



Forma Rhynchio similis ; clypeo margine anteriore acuto ; palpis 

 labialibus 3-articulatis, palpisque maxillaribus 6-articulatis. 



Head small, rather rounded in front ; antennae of moderate 

 length, simple ; flagellum stout, joints subequal in length ; 

 clypeus strongly convex, produced to a point at apex, the 

 greatest breadth equal to the greatest length ; mandibles of 

 moderate length, subacute, bluntly dentate on the inner 

 side; labial palpi stout, 3-jointed, joint 3 half as long as 

 joint 2, and terminated by a conspicuous bristle ; maxillary 

 palpi 6-jointed, joints 1 and 2 longest, joint 3 shorter than 

 joint 2, joint 4 longer than joints 5 and 6, joints 5 and 6 

 subequal. Pronotum transverse, anterior angles produced 

 to form spines laterally; mesonotum, scutellum, and post- 

 scutellum slightly arched ; median segment truncate; dorsal 

 surface medially half as long as scutellum, longer laterally, 

 depressed ; surface of truncation traversed by a longitudinal 

 groove. Legs : intermediate tibiae with one spur, the claws 

 of the tarsi bifid. Wings : radial cell widely subtriangular, 

 three cubital cells ; second cubital cell petiolate, receiving 

 both recurrent nervures. Abdomen as in Rhynchium, first 

 abdominal segment rather narrower than the second. $ . 



This genus strongly resembles Alastor in general facies, 

 but is immediately recognized as distinct by the pointed 

 clypeus and 3-jointed labial palpi. Alastor does not seem 

 to have been recorded from Africa. 



Rhynchalastor fuscipennis, sp. n, 



Ferrugineus, capite mesothoraceque nigris ; alis fusco-hyalinis, 

 cellula cubitali secunda petiolata. 



? . Black ; mandibles, the clypeus, cheeks, scape in front, 

 pronotum, tegulse, mesopleurae partly, apical half of scutellum, 

 postscutellum, dorsal surface and sides of median segment, 

 the legs, dark fusco-ferrugineous. Abdomen totally ferru- 

 gineous brown. 



Wings fusco-hyaline, costal area darker fuscous. 



Punctured : head, thorax, median segment coarsely 

 rugosely, clypeus finely punctured; abdomen impunctate. 

 A narrow band on apical margin of each abdominal segment 

 shining. 



Covered with a moderately long and dense ferrugineous 

 pile, longest on abdomen ; no pile present on the clypeus or 

 mandibles. 



Length 11 mm. 



Hub. German East Africa ; 1 ? . 



