Longicorn Coleoptera of Tropical America. 37 



character, added to the enlarged metastemum, slender abdo- 

 men (often constricted at the base), subcylindrical or oval tho- 

 rax, and elytra never much abbreviated or subulate, will di- 

 stinguish Odontocera from all the allied genera. The antennae 

 vary in thickness and length ; in most species they are short, 

 thick, and strongly serrated from the sixth or fifth joint ; but 

 many have very slender, filiform antennas. Some of these I 

 formerly placed in the genus Agaom, notwithstanding the 

 slender or constricted abdomen ; but this course is the less 

 admissible, as the type of the genus Odontocera ( 0. vitrea of 

 Serville) is described as having slender antennee. 



I. AntenncB elongate, slemler. 



1. Odontocera molorcho'ides^ White. 

 Rhitiotragus tnolorchoides, White, Cat. Long. Col. Brit. Mus. p. 200. 

 R. Amazons. 



2. Odontocera vittipenms, n. sp. 

 0. nigra, cano pubescenvS ; thoraee oblongo-ovato, rufo-aurantiaco, 

 reticulato-punctato, opaco ; elytris nigris, vitta albo-testacea, 

 vitrea ; tarsis posticis albis ; antennis elongatis gracihbus, articu- 

 lis a sexto leviter serratis basi flavo-testaceis. Long. 4 lin. cf . 



Brazil {coll. W. W. Saunders). 



Head black, clothed with hoary pile ; muzzle elongated ; 

 eyes (male) nearly touching the median line in front. Antennje 

 as long as the body, black ; joints sixth to eleventh yellow at 

 base, third to sixth linear, seventh to tenth elongate, moderately 

 dilated and serrate at their apices. Thorax rather broader 

 than the elytra, subovate, the sides being much rounded near 

 the middle ; the smface is opaque, covered Avith shallow round 

 pits, and with the flanks light red. The elytra nearly reach 

 the apex of the penultimate segment ; they are subparallel 

 from the middle, with tips obliquely and sharply truncated ; 

 their surface is very closely and coarsely punctured and deep 

 black, except a narrow well-defined central vitta from the base 

 to near the apex, Avhich is whitish, faintly punctured, and 

 shining. The legs are black, with the exception of the hind 

 tarsi, which arc Avhite, and have their basal joint longer than 

 the remaining three together, but not slender ; the middle 

 femora are abruptly and very broadly clavate ; the hind legs 

 greatly elongated, and their femora very gradually and mode- 

 rately thickened. The under surface of the body is densely 

 clothed with short hoary pile ; the abdomen is moderately 

 slender, and the anterior coxse scarcely exserted. 



