of the Amazons Valley. Ill 



curved shape of the third. The males of most species have a 

 short, slender, curved joint at the tip of the eleventh joint of 

 the antennae, which is sometimes visible (but much smaller) in 

 the female. 



1. Hijpselomus hasalis, Thomson. 

 Hypsioma basalis, Thomson, Classif. des Cerambyc. p. 117. 



//. modice elongatus, brunneus ; capita, thorace et elytrorum parte 

 antica rufesceuti-ochraceis ; summa fronte acute bituberculata ; 

 antennis nigris, basi rufescenti-ochraceis, articulis cseteris basi 

 rufescentibus ; elytris basi utrinque vix elevatis, nigro tuberculatis 

 humeris, apice nigris ; abdomine lateribus rufo vittatis ; pedibus 

 nigricantibus, tibiis compressis, posticis {S) apice dilatatis. Long. 

 6-9 lln. c? $ . 



A common insect throughout the Amazons region, being 

 found, like the rest of the species, on dead branches, closely- 

 adhering to them, and gnawing the bark and wood all round, 

 until the bough is sometimes severed. The face and parts 

 of the mouth are much elongated and directed a little back- 

 wards between the anterior haunches, so that when the legs are 

 extended, grasping a branch, the jaws are in a good position to 

 gnaw effectually. The supplementary joint of the antennae is 

 very conspicuous in the males of this species. 



2. Hypselomus pidicornis, n. sp. 



B. suboblongus, brunneus, elytris fascia obliqua indistincta palli- 

 diore ; antennis brunneis, articulo 2'^° toto et cseteris basi rufes- 

 centibus ; elytris basi hand tuberculatis, humeris oblique conicis 

 modice productis. Long. 7 lin. $ . 



Head brown, forehead near base of antennae with two very 

 small conical tubercles. Antennae about the length of the body, 

 setose beneath ; basal joint strongly and abruptly clavate, third 

 much bent, dark brown ; second joint, basal half of third, and 

 bases of each remaining joint pallid-reddish. Thorax scarcely 

 uneven on the surface, uniform dingy brown. Elytra oblong 

 trigonal; shoulders moderately prominent, and thence gradually 

 narrowed to the apex, which is broadly rounded ; surface con- 

 vex; centrobasal ridges not at all promment, and quite destitute 

 of tubercles, the basal half of the elytra being simply punctured. 

 Body beneath rufescent tawny, centre of abdomen black ; legs 

 brown, claw-joints of tarsi with their basal halves pale reddish. 



Ega; rare. 



3. Hypselomus Amazonicus, Thomson. 



Hypsioma Amazonica, Thomson, Classif. des Ceramb. p. 119. 



H. convexus, brunneus ; elytris humeris conicis, subuncinatis, pone 



medium fascia irregular! pallidiore, delude ad apices pallide mar- 



