104 AMERICAN COLEOPTERA. 



cariini ; on a somewhat lower plane and separated from the front by 

 a deeper suture in Dasycerini and Lathridiini. 



Antennae clavate (capillary in Dasycerus), 9-11 -jointed, club 3 or 

 rarely 2- jointed ; inserted anteriorly at the sides of the front, the 

 base sometimes a little concealed by the frontal margin. They are 

 usually shorter than the head and prothorax, but occasionally 

 reach or even pass the base of the pronotum. The first two joints 

 are always larger than those following, the second as a rule some- 

 what narrower than the first; funicular joints subequal or very 

 slightly increasing in width and gradually shorter; club usually 

 more or less abruptly formed, the first two joints either elongate or 

 transverse, the first generally longer than the second, the last joint 

 more elongate and frequently obliquely truncate. 



Eyes normally large and prominent, small or minute in Molopara- 

 mecus, Cartodere, Metophthalmw, Adi&temia and Belonia, entirely 

 wanting in Fuchsina. They are situated at, or much more fre- 

 quent])' a little in advance of the hind angles, thus leaving more or 

 less distinct tempora, and are lateral in all genera except Metoph- 

 thalmus, in which they are concealed from beneath by the explanate 

 side margin of the head. 



Prothorax of variable form, nearly always distinctly wider than 

 the head, and rarely as wide as the elytra; the margin very often 

 (Lathridiini and Corticariini) finely crenulate or denticulate, espe- 

 cially toward the hind angles, and occasionally ( Coninomus espe- 

 cially) with a whitish membranous border, which may become 

 irregular through wear, or even entirely lost. Surface evenly con- 

 vex, or variously marked with foveae or costae; by far the greater 

 number having either a median subbasal fovea or a more or le>s dis- 

 tinct transverse impression. 



Scutellum ordinarily distinct, but small and transverse; indistinct 

 or entirely lacking in a few genera. 



Elytra oblong, oval, or sublinear ; entirely covering the abdomen 

 except in a few species of Melanophthalma, in which they are 

 slightly truncate or subtruncate, revealing the tip of the abdomen ; 

 each 6-8 punctate-striate, except in the Merophysiini, where the 

 punctuation is confused, and in Revelieria and Fuchsina, where 

 they are 12 or 13 in number and more or less irregular. 



Prosternal side pieces not divided, the suture separating them 

 from the presternum nearly or quite obliterated. This suture, 

 though faint, is traceable in Holoparamecus. Coxal cavities sepa- 



