CIIEMASTOGASTER. 127 



6*. Eyes round. 



«\ Metanotal spines slender, 

 not thick at base, divergent, 



straight, not curved C. sub/iuda, p. 129. 



b'. Metanotal spines thick at 



base, less divergent, curved. C. anthracina, p. I'S'I. 

 b-. Pronotum not sculptured, smooth. 

 a^. Basal level portion of nietanotum 

 sculptured. 

 a'. Pronotum with distinct lateral 



obtuse tubercles C. sa<jei, p. l:J.j. 



b^. Pronotum not tuberculate, 



convex C walshi, p. 1.3G. 



b^. Basal,level portion of metanotum 



not sculptured, smooth. 



a^. Head, viewed from the front, 



anteriorly truncate, raised 



into a high convex cone 



above C. aberrans, p. 136. 



Z»\ Head, viewed from the front, 

 anteriorly not truncate, not 

 cone-shaped above. 

 «'. Pro-mesouotal suture ob- 

 solete or ver}' slight. 

 «". Metanotal spines short, 

 much shorter than the 

 length of the basal, level 

 portion of metanotum. . C. politula, p. 131. 

 V'. Metanotal spines long, 

 longer than basal, level 

 portion of metanotum. 

 a' . Cheeks and antennal 



hollows finely striate . C. travaacorensis, p. 134. 

 b'. Cheeks and antennal 



hollows not striate . . C. ransonneti, p. 137. 

 b'. Pro-mesonotal suture well 

 marked, distinct. 

 «''. Mesonotum witli a dis- 

 tinct transverse im- 

 pression C. dalyi, p. 138. 



b''. Mesonotum without any 

 transverse impression. 

 a'. Cheeks finely striate . . C. soror, p. 134. 

 v. Cheeks smooth, not 



striate C. ebeniyia, p. 133. 



e'. Club of flagellum of antennje '2- 

 jointed. 

 «'-. Colour yellowish brown ; I'nd joint 

 of pedicel with a broad longitudinal 



groove above C. millardi, p. 135. 



b^. Colour paler yellow ; 2nd joint of 

 pedicel with no longitudinal 



groove above C. biroz, p. 138. 



b. Head not smooth, entirely sculptured. 

 a'. Metanotal spines shorter than meta- 

 notum. 

 a^. Metanotal spines sk'uder, apex 

 directed backwards and outwards. 



