170 Mr. H. W. Bates un Lunyicorn 



The species on which it is necessary to found the pre- 

 sent genus, bears some resemblance to the males of small 

 species of Pyrodts, e. g., nigricornis ; but it dift'ers totally 

 from the sub- family Pyrodince in the form of the sterna, in 

 which character it agrees best with Nicias. The thorax 

 too is destitute of lateral serrature, having three small 

 equidistant teeth. From Nicias it differs in the robust 

 serrated antennge. 



Otheostethus melimtirus, n. sp. — Rubro-fulvus nitidus, 

 nudus ; antennis, elytrorum triente apicali, tibiis et tarsis, 

 nigris; capite thoraceque lateribus grosse rugosis, medio 

 sparsim punctatis ; elytris passim grosse confluenter 

 punctatis ; costula Ima a lobo baseos, 2nda post humerum, 

 8ia et*4to infra humerum, incipientibus, his debilibus, 

 ante apicem coeuntibus. Long. 7 lin. J'. 



One example, in Mr. Belt's collection. 



Fam. CERAMBYCTD^. 



Section A. 



Eyes coarsely facetted. Habits nocturnal. 



Malacopterus lineahis, Guerin-Meneville, Icon. E. A. 

 p. 222. — Several examples, agreeing with a specimen 

 from the Amazons taken by myself. 



Genus Tristachycera, nov. gen. 



J. Corpus elongatum, subcylindricum. Caput breve, 

 fronte verticali, brevissima, vertice inter antennas con- 

 cave. Mandibulae brevissim^e, arcuatee. Palpi omnes 

 brevissimi, articulo ultimo penultimo angustiori, conico, 

 truncate. Oculi valde emarginati, lobo inferiori modice 

 convexo. Antennge corpore dimidio longiores, filiformes, 

 pubescentes, subtus dense longe ciliatse ; articulis 3-5 

 subtus apice breviter spinosis. Thorax inermis, ut in 

 Gen. G^'ine postice dilatato, et basi subito constricto. 

 Elytra thorace angustiora, apice rotundata, supra hand 

 costata, confertissime punctata. Prosternum inter coxas 

 latiusculum, elevatum, parallelum, longe ultra coxas pro- 

 longatum, apice obtusum. Mesosternum inter coxas 

 magnas globosas depressum, angustum, lineare. 



The remarkable insect on which this genus is founded 

 has the metallic colouring of the Xystrocerce, but the 

 general forra^ especially as regards the thorax, of (Erne. 



