24 Mr. C. J. Gahan on Longicorn Coleoptera 
with a spine at their outer termination. Antenne in the 
male reaching to withm a short distance of the apex of th: 
elytra, in the female surpassing but little the middle of the 
elytra, with the third joint in both sexes but little longer 
than the seape. 
Criodion cinereum, Oliv. 
Prionus cinereus, Oliv. Ent. iv. 66, p. 35, pl. xii. fig. 55 (Q ). 
Criodion placidum, De}. 
Castaneum, griseo sat dense pubescens; prothorace supra leviter 
tuberculato, valde subrugoseque punctato, lateribus imzequalibus ; 
elytris rufo-castaneis, fulvo-griseo sat dense pubescentibus, apici- 
bus rotundatis et ad suturam brevissime spinosis; femoribus 
intermediis posticisque apice unidentatis; antennis quam ecorpore 
paullo (3) vel multo ( 2 ) brevioribus. 
Hab. Cayenne. 
I have here characterized the C. plactdum of Dejean; but 
I have no doubt that this is the species described and figured 
by Olivier under the name Prionus cinereus. It may be 
distinguished from C. fulvopilosum not only by a difference 
in colour, but by its less distinctly tubercled and more strongly 
and much more thickly punctured prothorax. 
Criodion antennatum, sp. n. 
Castaneum, cinereo sat dense pubescens ; prothorace parum trans- 
verso; basi apiceque constricto, lateribus tuberosis, subime- 
qualibus, fortiter sat denseque punctatis, disco leviter tuberculato, 
sparsim punetato; elytris apicibus rotundatis, sutura breviter 
mucronatis; femoribus intermediis posticisque apice breviter 
unidentatis ; tibiis apice extus breviter spinosis ; antennis utroque 
sexu articulis duodeeim distinctis. 
Long. 49, lat. 12 mm. 
Hab. Venezuela. 
Clothed almost entirely with a rather dense ashy-grey 
pubescence. | Prothorax slightly transverse, constricted at 
the base and apex, somewhat swollen and uneven along the 
sides, the latter strongly and rather thickly punctured, the 
disk with three feeble tubercles or callosities and with some 
strong punctures. Hlytra each rounded at the apex, briefly 
mucronate at the suture. Antenne about equal in length to 
the body in the male, much shorter in the female; the third 
joint longer than the first and second taken together, and 
more than half as long again as the fourth, the latter shorter 
