BATRISINI 225 



staple with abruptly everted ends (this odd structure may also 

 be likened to a single heavy carina which is medianly and longi- 

 tudinally sulcate, with this narrow sulcus closed apically and ex- 

 panded basally ) ; 2 mm aubei 



Head with different modifications 7 



7. Vertex and occiput more or less distinctly excavated, the excavation 



simple or complexly spined, tuberculated, sulcate or carinate.... 8 

 Head between the eyes to the occiput simply convex or slightly tumid, 

 never armed as noted above 9 



8. Metasternum with the apical margin medianly erected between the 



posterior coxae into a transverse lamella which is inclined anteriorly 



(basally) ; 2.4 mm edithae 



Metasternum not modified as noted above 10 



9. Vertex simply convex between the eyes and the occiput, anteriorly there 



are three obsolete impressions, an apical transverse and two sub- 

 circular; 1.9 mm areolatus 



Vertex from the eyes to the occiput simple, slightly transversely gib- 

 bous; anterior half of vertex simply and deeply depressed, this ex- 

 cavation strongly rounded posteriorly, occupying the median third 

 of the head width and extending in an arc for median third of the 

 inter-antennal margin; 1.6 mm cinnamomeus 



10. Head subquadrate to longer than wide 12 



Head strongly transverse 11 



11. Head with a slightly arcuate, deep, entire sulcus which extends from 



just above and behind each eye transversely over the vertex, this 

 conspicuous excavation extended posteriorly at middle in a second- 

 ary subtriangular excavation ; in the center of this transverse sulcus 



is a small tubercle; metasternum sulcate; 1.25 mm transversalis 



Head more strongly transverse; vertex with a suboval depression at 

 middle between the eyes, with an elongate oval tubercle at center of 

 this depression; just apical to this median depression is an arcuate, 

 transverse sulcus occupying median third of the vertex ; metasternum 

 sulcate with a strong compressed tubercle on each side; 2.3-2.4 mm. 

 vulneratus 



12. Head subquadrate, about as long as wide 13 



Head much longer than wide; 2.1 mm cornutus 



13. Metasternum simple ; 2.1 mm cerastes 



Metasternum broadly concave, with a deep and narrow sulcus in the 



concavity, armed on each side behind the middle by a sharp spine; 

 1 .5 mm elegantulus 



14. Head with either a small tubercle near middle of the front, or a slender 



carina on the vertex 15 



Head without a frontal tubercle and without a vertexal carina 17 



15. Head with a small tubercle 16 



