BATRISINI 227 



6. Vertex prominently elevated 7 



Vertex simply convex to flattened 8 



7. Vertex becoming prominently triangularly elevated apically, this ele- 



vation with an apical ciliated border and apical to this a very small 

 median fovea; anterior and intermediate trochanters armed each 



with a small, pointed tubercle; 1.9 mm triangularis 



Vertex becoming prominently triangularly elevated apically, the 

 summit of this elevation acutely incised or notched, with a large 

 oblique fovea on each side entering on the front; intermediate tro- 

 chanters sparsely pubescent; 1.55 mm elevatus 



8. Front more or less tuberculated 9 



Front without a tubercle, but excavated or incised 11 



9. Front with a very short, median, wide, strongly truncated tubercle, 



with the truncated face of the tubercle rugose; antennal tubercles 



flattened and rounded; the trochanters simple; 1.9 mm 



circumscriptus 



Front with a median tubercle which is more or less shai-p-pointed ; an- 

 tennal tubercle strongly formed, especially prominent laterally; 

 therefore the frontal margin of head appears trituberculate 10 



10. Head some longer than wide, with a strong, thick, median triangular 



spinoid tubercle on the front and very prominent antennal tubercles; 



trochanters simple; metastemum deeply sulcate; 2.1 mm 



peniculus 



Head slightly transverse, with a frontal tubercle in the form of a 

 medianly-placed, erect, straight horn; intermediate and posterior 

 trochanters with a small brush of setae; 1.9 mm erectus 



11. Front simply depressed and broadly bifoveate; metastemum broadly 



sulcate; intermediate trochanters slightly pubescent; 1.7 mm 



labiatus 



Front diversely notched, incised or excavated 12 



12. Frontal incisure large and quadrangular; trochanters simple; meta- 



stemum with an entire but shallow median sulcus; 1.4-1.6 mm 



honestus 



Frontal incisure deep to very shallow, and of various shapes but not 

 quadrangular 13 



13. Frontal incisure triangular, deep, with an excavated area within the 



borders of the incised area 14 



Frontal incisure not triangular, and not as deep 15 



14. Deep triangular notch of the front regular in outline, with a transverse 



carina placed near the bottom of the incisure and apically ; clypeus 

 with a conspicuously large, basally compressed, transverse horn, this 

 horn being dorsally swollen, rugose and slightly pointed posteriorly; 

 trochanters simple; metastemum with a broad, entire sulcus more 

 or less carinated apically ; 2 mm elephas 



