CAMEKON, VKSI'IDAE. 175 



Eumenincc. 

 Eiimenes LATR. 



The Masai species of this genus may be separated by means of the following table. 

 They are somewhat diverse" in form, size and colouration. 



1 (4-). Largely marked with yellow on the head, thorax and abdomen. 



2 (3). Basal half of mesopleuroe yellow, the yellow mark not much narrowed 

 below ; middle of petiole not black above, the apex with a broad mushroom-shaped black 

 mark and with 2 yellow spots on the apex, the 2nd segment with a broad transverse 

 and a narrower longitudinal black line. meruensis CAM. 



3 (2). Mesopleura? with a basal mark which becomes gradually narrowed below, 

 the middle of petiole with a longish black line, narrowed towards the apex, which has 

 no yellow spots, the 2nd segment black with an oblique basal lateral and a transverse 

 apical one. xanthaspis CAM. 



4 (1). Black entirely or slightly marked with red. 



5 (6). Small (under 10 mm.), the abdominal petiole distinctly, closely punctured, 

 short, thick. crassinoila CAM. 



6 (5). Large (12 mm. and over), the abdominal petiole long, smooth, slender, at 

 least at the base. 



7 (10). Wings uniformly fuscous-violaceous. 



8 (9). Thorax and abdominal petiole entirely black, the 2nd transverse cubital 

 nervure broadly roundly curved in front. maxillosa D. G. 



9 (8). Thorax and abdominal petiole marked with red, the 2nd transverse cubital 

 nervure straight, oblique in front. eryihrospila CAM. 



10 (7). Wings for the greater part hyaline. 



11 (12). Head and thorax densely haired, the metanotum without red, the abdo- 

 minal petiole without yellow on the sides, the fore ocellus larger than the others. 



liirasia SAUSS. 



12 (11). Head and thorax not densely haired, the metanotum for the greater part 

 rufous, the petiole marked laterally with yellow. 



13 (14). Sides of post-petiole broadly yellow, the black central line only on post- 

 petiole, pro- and metapleurse not spotted with yellow, the 1 post-petiole clearly separated. 



variventris CAM. 



14 (13). Sides of post-petiole with a short yellow line on the base, a black central 

 line on the whole petiole, pro- and metapleura 1 spotted with yellow, the post-petiole not 

 clearly separated. eryihraspis CAM. 



Euiucnes xanthaspis sp. nov. 



Black, the clypeus, a mark roundly dilated above over the antennre, united to the 

 yellow of the clypeus, labrum, upper half of Ihe mandibles to near the apex, the greater 

 part of the antennal scape below, a narrow line on the outer orbits, prothorax, except 



