229 



6. Front narrow, nearly linear, gradually a very little widened 



below. Vertex narrow, truncated at apex, produced 

 about one third of its length before the eyes. 



Stenocranus. 

 Front broader, sides not parallel, (7) 



7. Front widest a little above the middle. Apex of the ver- 



tex rounded, produced a little before the eyes, the 

 carinae becoming obsolete on the apex of the head. 



Kelisia. 

 Front broadest below, generally much narrowed above be- 

 tween the eyes. Vertex square at tip, the frontal 

 carinae continued strongly distinguished over the 

 apex of the head. (8) 



8. Vertex but little advanced before the eyes. Basal joint of 



the antennae in length subaequal to the second, 

 flattened, obtriangular and oblique at apex ; second 

 joint flatfish or nearly terete, papillate. Front nar- 

 row, sides nearly rectilinear, carina; very prominent. 

 Cheeks broad-triangular. Elytral nervures setige- 

 rous punctate. Stobera. 



Vertex long, extended well before the eyes Basal joint 

 of the antennae shorter and more slender than the 

 second, terete. Front distinctly widened below 



Megamelus. 



9. Front with one median carina. (10) 

 Front with two median carinae (12) 



10. Anterior and intermediate tibiae foliaceous. Insect short 



and stout. Phyllodinus n.eren. 



Anterior and intermediate tibiae slightly if at all expanded. 



1 1. Front very broad, six sided, with a distinct median carina 



forked at the apex of the head, either side with 

 one or two rows of pitted granules. Vertex broader 

 than long. Pronotum short, emarginate behind, 

 truncated before, lateral carinae following the contour 

 of the eyes, papillate. Lac coca r a n. gen. 



