SUBFAMILY II. — COREINyE. 213 



ee. Hind femora unarmed beneath, or if armed, with only two or three 

 small teeth, not much swollen in either sex; front side margins 

 of pronotum rarely (Tribe VI) distinctly toothed. 

 /'. Antenniferous tubercles very prominent, the cheeks and tylus 

 strongly abruptly deflexed, the space between the tubercles 

 therefore unfilled. 

 g. Third joint of antennae not dilated near apex; antenniferous 

 tubercles without a spine; form broadly oval. 



Tribe V. Menenotini, p. 234. 



gg. Third joint of antennae with a thin flat dilation near apex; 



antenniferous tubercles with a distinct spine above their base; 



form elongate, narrow. Tribe VI. Chariesterini, p. 238 



//. Antenniferous tubercles not prominent, the cheeks and tylus not 



strongly deflexed, the space between the tubercles filled; form 



oblong or elongate-oval. Tribe VIII. Coreini, p. 242. 



Tribe I. ACANTHOCEPHALINI Stal, 1870, 149. 



Elongate-oval pubescent species of large size, having the 

 head subquadrate, not produced in front of antennae, the tylus 

 compressed to form a flattened plate which is projected upward 

 between the antenniferous tubercles in the form of a triangular 

 spine ; basal joint of antennae usually twice or more the length 

 of head ; ocelli inserted closer to eyes than to each other ; beak 

 not reaching hind coxae; femora all armed beneath, the hind 

 ones of male often much swollen ; hind tibiae strongly dilated on 

 one or both sides. 



This tribe, thus briefly characterized, comprises nine genera, 

 all but one confined to Central and South America. Our single 

 genus was by Uhler and other authors for many years called 

 Metapodius West. (1842, 4), but by Van Duzee and more re- 

 cent writers this name is considered a synonym of Acantho- 

 cephala Lap. 



I. Acanthocephala Laporte, 1832, 29. 



Elongate-oval species of large size and dull color having the 

 head small, porrect, much shorter and narrower than middle 

 of pronotum; tylus as in key; beak reaching or surpassing 

 middle coxae, joints 1, 2 and 4 subequal in length, 3 shorter; 

 antennae with first joint stout, somewhat curved, often twice 

 or more the length of head, 2 — 4 more slender, third shortest ; 

 pronotum subhexagonal, wider at base than elytra, strongly 

 declivent, much narrowed in front, the side margins straight, 

 strongly converging from the prominent humeri to apex, which 



