6 PROCEEDING OF THE NATIONAL MUSEUM vol. 124 



5. Inferior margin of hind femur sharply right-angled at middle; apical fourth 



of sixth tergum polished and impunctate; mesopleural disk only slightly 

 or not at all produced in middle; comparatively more sparsely punctate 

 species, most of pronotal disk with punctures small and separated by one 

 or more times the diameter of a puncture; anterior ocellus closer to occiput 

 than to apices of antennal tubercles; ocellocular distance 0.50-0.58 times 



the ocelloccipital distance 6 



Inferior margin of hind femur obtusely angulate in middle; apical fourth of 

 sixth tergum shagreened and impunctate; mesopleural disk produced 

 anteriorly in middle so that it overhangs the concave anterior face; com- 

 paratively a more densely punctate species, most of punctures on anterior 

 half of pronotal disk coarse, subcontiguous and separated by less than the 

 diameter of a puncture; ocellocular distance 0.42-0.44 times the ocel- 

 loccipital distance; anterior ocellus closer to apices of antennal tubercles 

 than to occiput ; Ceylon, India, Burma, Malaysia, and Philippines. 



longiceps (Turner) 



6. Anterior margin of pronotum not ridged; first tergum not transversely 



ridged anteriorly; mesopleural disk slightly produced anteriorly in middle; 

 distance from apex of antennal insertions to occiput 0.83-0.93 times the 



width across eyes; Uganda and Gabun ugandensis (Turner) 



Pronotal disk and disk of first abdominal tergum each with a strong trans- 

 verse ridge anteriorly; mesopleural disk not produced anteriorly; distance 

 from apex of antennal insertions to occiput 0.94-1.0 times the width 

 across eyes; Philippines bakeri, new species 



7. Intermediate flagellar segments with length and width subequal; ocellocular 



and ocelloccipital distances subequal; pronotal disk anteriorly with one 

 weak, transverse ridge; head and pronotum red; South India. 



crassepunctata (Turner) 

 Intermediate flagellar segments with length 1.2-1.5 times the width; ocel- 

 locular distance 0.6-0.7 times the ocelloccipital distance; pronotal disk 

 anteriorly either with a single strong ridge or with three weak ridges; 

 head usually red, pronotum always black 8 



8. Sterna 5-6 each with the posterior area clothed with dense, short, velvety 



vestiture; pronotal disk anteriorly with three weak transverse ridges; 

 ocellocular distance 1.5 times the postocellar distance; metapleuron above 

 with close coarse ridges; genitalia with inner surface of squama and cuspis 

 volsellaris densely setose, cuspis vosellaris digitate at apex; India, Burma. 



dimidiaticornis (Bingham) 



None of sterna with velvety vestiture; pronotal disk anteriorly with a single 



strong transverse ridge 9 



9. Small (11 mm long), quite sparsely punctate species; pronotal disk with 



almost all of punctures separated by one or more times the diameter of a 

 puncture; sterna 3-5 with very sparse, scattered hairs; ocellocular distance 

 1.6 times the postocellar distance; genitalia with inner surface of squama 

 and cuspis volsellaris not densely setose, apex of cuspis volsellaris digitate; 



Philippines bakeri, new species 



Larger (12-17 mm long), more closely punctate species; pronotal disk with 

 many of punctures contiguous or separated by less than the diameter of a 

 puncture; sterna 3-5 each with short, erect, moderately dense vestiture 

 on apical half; ocellocular distance 1.9-2.8 times the postocellar distance. 



10 



10. Clypeal keel complete, terminating on apical third in an inverted U-shaped 



carina the arms of which extend to the very strong marginal teeth; meta- 



