New Genera and Species of Neotropical Curculionidae. 221 



Genus Xestogastee, nov. 



Head with the eyes much less prominent than in Compsus, their 

 anterior margms deeply impressed. Rostrum with the scrobe not 

 much curved and running to the middle of the eye ; the epistome 

 steeply excavated and with the hind margin almost semicircular; 

 the mandibles densely setose, but without scales, the cutting edge 

 not toothed; the mentum with a number of setae on each side. 

 Antennae comparatively slender, not squamose ; the scape exceeding 

 the eye, gradually clavate ; the funicular joints in order of length : 

 2, 1, 3, 4, (5, 6, 7), all much longer than broad, clavate; the club 

 4-jointed. Scutellum small. Elytra with the basal margins obliquely 

 truncate, somewhat raised, and fitting closely to the prothorax; 

 the shoulders projecting but little and very sloping ; the apices not 

 produced; stria 10 abbreviated. Wings rudimentary. Legs com- 

 paratively slender and almost devoid of scaling; the tibiae not 

 denticulate, the two anterior pairs strongly mucronate, the hind 

 pair with the corbels broadly enclosed and thinly squamose. Ster- 

 num with the anterior margin of the front coxal cavities transversely 

 impressed, the coxae placed in the middle of the prosternum ; the 

 mesosternum raised into a tubercular prominence between the coxae, 

 the mesepisternum separated from the elytra ; the metasternum at 

 its shortest not or but little longer than the middle coxae. Venter 

 as in Compsus, but bare and very highly polished. 



Genotype, Compsus viridilimhatus Bovie (1907). 



The members of this genus can be distinguished from 

 all their allies by the mesosternal tubercle and the highly 

 polished venter. As indicated above, Compsus nnicoreiis 

 Kirsch (1889), from Peru, probably belongs to this genus. 



Xestogaster porosa, sp. n. (Plate III, fig. 3.) 



(j*?. Integiunent black, partly clothed with very pale opalescent 

 green scaling, which is more or less overlaid (especially in the 

 hollows) with yellowish powdering or exudation; the prothorax 

 with scaling in the three longitudinal impressions only ; the elytra 

 with a broad stripe of scaling between intervals 3 and 7, elsewhere 

 with the scales in the foveae only (perhaps abraded); the rest of 

 the body and legs bare. 



Head with a few very shallow punctures and a small frontal 

 fovea. Rostrum evidently longer than its basal width, strongly 

 dilated towards the apex; the interantennal area broadly and 

 deeply excavated ; the dorsum gently convex in the basal half and 



