350 



FOEMICIDJE. 



b 6 . Head and abdomen black 

 or dark castaneous red ; 

 thorax yellow, wholly or 

 in part. 



a'. Medial lobe of clypeus 

 long rectangular ; the 

 lateral angles acute. 

 a 8 . Head much broader pos- 

 teriorly than in front. . 

 i 8 . Head only as broad pos- 

 teriorly as in front . . 

 b 7 . Medial lobe of clypeus 

 short, not much pro- 

 duced ; the lateral 



angles rounded 



b 5 . Tibia? without spines be- 

 neath. 

 a 6 . Head, thorax and abdomen 



finely rugulose opaque. 

 ". Castaneous brown .... 

 b". K eddish yellow, apex of 



abdomen darker 



b K . Head, thorax and abdo- 

 men sparsely punctured, 

 shining, not opaque, 

 a". Plead, thorax and abdo- 

 men dark castaneous 

 brown. 



a 6 . Pronotum longer than 

 mesonotum, strongly 

 constricted, anteriorly 



forming a neck 



b a . Pronotum about equal 

 in length to meso- 

 notum, only slightly 

 constricted, in front 

 not forming a distinct 



neck 



b~. Head and abdomen fus- 

 cous brown or black (in 

 $ min. head sometimes 

 yellow) ; thorax honey- 

 yellow. 



a 8 . Distance between the 

 antennal carinae equal 

 to distance between 

 eyes and antennal 



carinse 



b 8 . Distance between an- 

 tennal carinae dis- 

 tinctly greater than 

 between eyes and 

 antennal carinae .... 



B. Regular arch of the thorax interrupted by 



the apex of the metanotum being truncate. 



a. Mandibles toothed at apex and also on 



inner margin 



C. dichrous, p. 356. 

 C. basalis, p. 352. 



C. iirttans, p. 353. 



C. badius, p. 358. 



C. nicobarensi*, p. 364. 



C. carin, p. 365. 



C. thruso, p. 356. 



C. mitts, p. 355. 



C. pallidits, p. 357. 

 C. giyas, p. 369. 



