Dynasti(l£e//'(?m Tropical America. 143 



loped, but in the species which I associate under the name of 

 Spodistes (none of which were known to Lacordaire) it is 

 entirely absent. Associated with this feature is the form of 

 the thoracic horn. In Lycomedes it is vertical or even directed 

 somewhat backwards, and is not pointed, but broad and more 

 or less compressed from back to front. It is channelled 

 down the middle, so as to appear as if formed from two fused 

 lateral horns. The prothorax in both sexes is very transverse. 



In Spodistes the horn is directed horizontally forward, as 

 in the other allied genera, is curved, and tapers to a point. 

 The prothorax in the male is considerably narrower than the 

 elytra. 



This genus forms a connecting-link therefore between 

 Lycomedes on the one hand and Agaocephala and Mitracephala 

 on the other. From the last it differs chiefly by the velvety 

 clothing of its upper surface and the narrowed prothorax of 

 the male. 



The following are the most salient features of all the species 

 of Lycomedes and Spodistes yet known to me : — 



Genus Lycomedes. 



Ceplialic horu toothed at base : 



basal tooth large, bifid ramosus, sp. n. 



basal tooth small Reichei, De Breme. 



Cephalic horn bilaminate at base : 



legs velvety velutipes, sp. u. 



legs pilose hirtipes, sp. n. 



Cephalic horu unarmed at btise : 



bifid at apex Burmeisteri, Waterh. 



tritid at apex Buckleyi, Waterh. 



Genus Spodistes. 



Cephalic horn toothed near base : 



simple at apex helticams, Bates. 



bifid at apex Batesi, sp. n. 



Cephalic horn unarmed at base: 



bifid at apex Mniszechi, Thorns. 



trifid at apex Hopei, sp. n. 



Lycomedes ramosus, sp. n. 



Griseo-olivaceus, fusco-nebulosus, velutinus ; cantho oculari acute 

 producto ; elytris subdepressis, latis, vix perspicue punctatis, 

 nebulosis, callis apicalibus prominentibus ; pedibus partim velu- 

 tinis, longe flavo-setosis. 



cJ , capita cornu valido, ramose, extremitatibus utrisque bifidis, 

 thorace coruu erecto, brevi, canaliculato, raunitis ; pronoti lateri- 



11* 



