S6 



HYMENOPTERA ACULEA TA. 



pubescence; $ apical dorsal valfe 

 remotely and finely hairy . . plumbeus. 

 (12) 13. (^ without sericeous grey pubescence ; 

 apicnl dorsal valve of ? densely 

 clothed with black bristly hairs . Niger. 



Abdomen red at the base. 



Propodenm more or less jiilose dorsally. 



Larger; the ba^sal segments with au 

 a] i^al black band ; ^ apical ventral 

 valve not oarinate .... viatic us. 



Small; basal segments entirely red ; 



cj apical ventral valve cariuate . consobrinus. 



Propodeum not pilose, or rarely so on 

 its sides only. 



Pronotum sharply angulated pos- 

 teriorly. 



$ with the anterior tarsi not bearing 

 a series of long regular spines ; $ 

 with the posterior tibire deeply 

 sinuate inwardly, or with the apical 

 ventral valve laterally compressed. 

 (22) 21. $ with the posterior tibiae sinuate, 



thickened at the apex ; third sub- • 



marginal cell triangular in both 

 sexes ; ? frtce between the eyes con- 

 siderably longer than wide . . minutulus. 

 (21 ) 22. (J tibiae simple ; third submarginal 

 cell in both sexes snbquadrate ; ? 

 face between the eyes almost as 



broad as long spissus. 



(20) 23. ? anterior tarsi with a regular row 

 of long spines (called the pecten) ; 

 $ posterior tibias simple ; apical 

 ventral valve not laterally com- 

 pressed. 



(25) 24. $ with the fourth, fifth, and sixth 



ventral segments longitudinally 

 impressed; ? dorsal apical valve 

 with thick bristly hairs . . . ciialtbeaii'S. 



(24) 25. cj ventral segments not impressed; ? 

 dorsal apical valve hairy, bat not 

 bristly. 



(27) 26. (J apical ventral valve flat, with a 

 well-marked carina at the base, no 

 pendant spine ; ? sides of the pro- 

 podenm with fine hairs, spines 

 between the claws very long and 

 regular, longer than the pulvilli . hnguicularis. 



(26) 27. (^ apical ventral valve not flat and 



carinated ; ? sides of the propo- 

 deum not pilose; spines between 

 the claws shorter and less regular. 

 (29) 28. c? apical ventral valve with a long 



