596 M. W. R. de V. GRAHAM 



axilla, sometimes as great as that of an axilla. Propodeal callus some- 

 times densely hairy ; sides of basal tergite of gaster sometimes 

 conspicuously so. Sometimes both mandibles have four teeth. Funicular 

 segments very variable in length, from shorter than to much longer than 

 the pedicellus ........... 67 



67 (66) Sides of propodeum extremely hairy, the hairs extending over the whole 



callus nearly to the plicae, over the supracoxal flanges, and even partly on 

 to the median area ; postero-lateral corners of the propodeum with a small 

 tooth. Basal tergite of gaster not conspicuously hairy. Genae, in frontal 

 view of head, almost angulate . . . PEZILEPSIS Delucchi (p. 782) 



Sides of propodeum less extensively pilose, the hairs not encroaching on the 

 median area ; if they cover nearly the whole of the callus, then the basal 

 tergite of the gaster is conspicuously hairy laterally. Postero-lateral 

 corners of propodeum rounded off. Genae curved .... 68 



68 (67) Both mandibles with four teeth. If the propodeum has a large strongly 



reticulate nucha, then the costula is rarely present, whilst the gaster is 

 oblong or sublinear .... TRICHOMALUS Thomson (p. 707) 

 Left mandible with three teeth, right mandible with four. Propodeum with 

 a large strongly reticulate nucha, and usually with a costula, which may be 

 strong. Gaster subcircular or shortly oval, much shorter than the thorax 



SPANIOPUS Walker (p. 702) 



69 (61) Antennae inserted very high on the head, their toruli distinctly nearer to the 



median ocellus than to the anterior margin of the clypeus ; scape reaching 

 above level of vertex. 



Postspiracular sclerite rather large, reticulate. Propodeal nucha repre- 

 sented merely by a transverse, weakly-sculptured or smooth strip . . 70 

 Antennae inserted less high, their toruli either midway between the median 



ocellus and the anterior margin of the clypeus, or else nearer to the latter 73 



70 (69) Face below level of antennal toruli, and the clypeus, with several conspicuous 



piliferous punctures ; the clypeus otherwise mainly reticulate. Pronotal 

 collar not margined . . . . ROPTROCERUS Ratzeburg (p. 423) 



Face and clypeus without piliferous punctures ; the clypeus striate. Pronotal 



collar at least slightly margined . . . . . . . .71 



71 (70) Antennal flagellum (Text-fig. 334) with a whorl of very long, strongly 



outstanding hairs on each segment ; funicular segments somewhat 

 nodulose ; scape reaching very far above level of vertex. Body bronze 

 to bluish black. 



Anterior margin of clypeus emarginate or with a median tooth 



APSILOCERA Boucek (p. 696) 

 Antennal flagellum with hairs not arranged in a single whorl on each segment, 

 the hairs neither so long nor so strongly outstanding ; funicular segments 

 not nodulose but cylindrical. Body bright green to blue ... 72 



72 (71) Anterior margin of clypeus with a median tooth 



STENOMALINA Ghesquiere (p. 600) 

 Anterior margin of clypeus without a tooth CHLOROCYTUS Graham (p. 611) 



73 (69) Gena with a large hollow which extends one third to half the distance 



between the base of the mandible and the eye ..... 74 



Gena usually without a hollow, rarely with a very narrow one just above the 



base of the mandible .......... 80 



74 (73) Fore wing without a speculum. Pronotal collar not margined but some- 



what rounded off anteriorly . . CATOLACCUS Thomson (p. 467) 



Fore wing with a large speculum. Pronotal collar at least weakly margined 75 



