HYMENOPTEROUS FAMILY STEPHANID.E. 723 



metatarsus and whole of following joints white, claws black. 

 Wings flavescent, costa beyond stigma black ; nervuves fuscons. 



Length of body and terebra 15-1 6| mm. Wings 8-8^ mm. 



Habitat : Manila (Luzon). Prof. Semper. 2 5 2- 



Sichel remarks on the variability of the serrations between the 

 large teeth. In one specimen one of these, near the apex of 

 femoi^a, amounts almost to a third tooth, while on the other 

 specimen this is pi^esent on one femur only. 



The coriaceo-granulate frons, the very smooth pro- and meso- 

 notum, and the apparent absence of all sculpture on the legs 

 suffice to distinguish this species. 



6. PACHYLOMBRUS Schlett. 



Stephanus pachylomei^us Schlett., p. 98, $ ; Morley (1), p. 111. 



2 . Frons coarsely arcuate rugose ; vertex very convex and 

 arcuate to transverse rugose ; occiput transrugose. Posterior 

 margin of head simple. Temples centrally prominent, very 

 shining ; cheeks shorter than scajje. Second flagellar joint more 

 than twice as long as first, third only as long as second. Neck 

 very short, with a deep oblique impression, and superficially 

 punctate -rugose ; semiannular polished, with very diffuse fine 

 punctures. Mesonotum with medium- sized and partly confluent 

 punctures. Scutellum smooth, margins of lobes obliquely striate. 

 Mesopleurse with the upper impressed part oblique rugose in 

 front, smooth behind, the lower convex part diffusely punctate. 

 Metapleurse coarsely and irregularly rugose, separated from the 

 cribrate-punctate median segment by a deep, slightly rugose 

 sulcus. Petiole finely transrugose, distinctly shorter than the 

 rest of abdomen ; second segment shining smooth, basally feebly 

 rugose, the remainder rather dull, Terebra longer than body, 

 its sheaths entirely black. Hind legs with coxae strongly shining, 

 diffusely punctate ; femora very incrassate, smooth, diffusely 

 punctate, bidentate ; tibite slightly longer than femora, compressed 

 nearly to middle. 



Black ; head, base of mandibles, scape, third segment entirely 

 and legs partly red ; apical abdominal segments more or less 

 rufescent. Wings subhyaline, discal and external submedian 

 cells infuscate. 



Length 28 mm.; terebra 35 mm. 



Habitat : West Africa (Gaboon) ; type in Nat. Hist. Museum, 

 Hamburg. Gold Coast ; in coll. British Museum. 



This species resembles S. co7'onator and duccdis in shajie and 

 colour, but may be easily distinguished by the entirely black 

 sheaths of the terebra, prominent temples, weaker puncturation 

 of mesothorax and more incrassate hind femora. From S. sul- 

 cifrons, which it also resembles, it may be known by the absence 

 of the sulcus on vertex and by the simple posterior margin of 

 head. It differs from S. xanthocepludics Cam. in the short pro- 

 notum, sculpture of prothorax and hind coxse, and in coloration 



Proc. Zool. Soc— 1922, No. XLIX. 49 



