122 RHYNCHOPHORA. 
elevation of the alternate intervals), just perceptibly convex, the sculpture greatly con- 
cealed by a sordid squamosity. 
This species is distinguished from the other Epzcewri by the somewhat aberrarit 
structure of the front of the rostrum. Only two specimens have been received ; they 
are no doubt the sexes, as they exhibit a great disparity in the breadth of the body. 
Group 3.—Thorax without the peculiar form and sculpture of Group 1; the rostrum 
usually a little broader towards the tip, with the pterygia exposed. (Species 39-52.) 
This group contains also a considerable variety of forms; as a rule, the rostrum is 
perceptibly broader at the tip and the pterygia a little more conspicuous than in 
group 2; usually, too, the scrobes are a little broader. 
39. Epicerus squamosus, sp. n. 
Minus convexus, niger, ubique pallide griseo-squamosus ; prothorace leviter inzequali, basi subconstricto ; elytris 
ovalibus, regulariter seriatim punctatis, interstitiis haud omnino planis. 
Long. 9-10 millim. 
Hab. Mexico, Puebla (Sad/é). 
Rostrum moderately long, parallel, scarcely impressed on the middle, with a small 
fovea between the eyes; antenne with the first joint of the funiculus rather longer than 
usual, a little longer than the second. Thorax a little narrower in front than behind, 
and slightly constricted at the base; the surface very feebly rugose, with no distinct 
punctures, and only traces of a depression along the middle. Elytra with series of 
moderately fine punctures, the interstices of which are not completely flat. Five 
specimens. 
This species appears to a considerable extent to connect the three groups. The 
surface is uniformly covered with adpressed pallid scales, each scale being isolated from 
its neighbours. There is a very fine, indistinct basal margin to the thorax. 
4). Epicerus marginatus, sp. n. 
Gracilis, sat convexus, niger, subsquamosus ; rostro prothoraceque dense punctatis, hoc paullulum inequali, 
dorso longitudinaliter impresso; elytris regulariter seriatim punctatis. 
Long. 10 millim. 
Hab. Mexico, Pachuca in Hidalgo (fége). 
Rostrum closely punctate, squamose and setose, with a broad depression along the 
middle and a rather obscure fovea above it. ‘Thorax narrower in front than behind, 
considerably constricted at the base, the basal margin raised, fine and definite; the 
surface slightly uneven, with a few irregular depressions of different sizes and also 
minutely punctate, but this punctuation concealed by a scale placed in each puncture ; 
along the middle with a deep, somewhat irregular sulcus. Elytra elongate-oval, with 
