34 Mr. H. W. Bates on the Longicorn Coleoptera 
Genus ALETRETIA, noy. gen. 
Body elongate-elliptical. Head short, vertically; forehead 
convex ; eyes not prominent; upper or reniform lobe moderately 
broad and reaching the centre of the crown, so that the eyes 
above are separated only by the longitudinal line of the vertex. 
Antenniferous tubercles short, unarmed : antenne stout, a little 
longer than the body, and tapering towards the apex, fringed 
beneath with long and fine hairs; basal joimt moderately short 
and thickened almost from the base. Thorax cylindrical, lateral 
tubercles very small. Elytra narrowed towards the apex, the 
tips obliquely and briefly truncated. Legs moderately elongated, 
tarsi narrow, claw-joint stout and as long as the three remaining 
joints taken together. 
The form and clothing of the antenne, shape of claw-joint, 
and general habit show this genus to be closely allied to the 
preceding, notwithstanding the numerous points of difference. 
Aletretia inscripta, n. sp. 
A. elongato-elliptica, nigra; thorace vittis quinque, elytris utrinque 
vittis quatuor (juxta basin et pone medium interruptis) fulvo- 
griseis, spatio nigro mediano elytrorum lineola transversa fulvo- 
grisea. Long. 33-43 lin. ¢ 9. 
Head clothed with greyish or tawny pile, not visibly punc- 
tured; central line deeply impressed; eyes nearly touching on 
the vertex. Antenne one-third longer than the body, dark 
brown, pubescent, fringed with long fine hairs beneath. Thorax 
cylindrical, rather broader in the middle, and having on each 
side a minute tubercle; surface punctured throughout, black, 
clothed with fine grey pile, and marked with five greyish-tawny 
vittee. Scutellum tawny grey. Elytra narrowed towards the 
apex, the tip briefly and squarely truncate, with the outer angle 
prominent ; surface deeply but sparsely punctured towards the 
base, faintly so and glossy towards the apex, black, the basal 
half with four light-brown vitte (the second one from the suture 
alone reaching the base), and the apical part with a number of 
short streaks of the same colour, the intermediate black space 
having on each elytron a transverse wedge-shaped line. Body 
beneath and legs clothed with light-brown pile. 
Upper and Lower Amazons; on dead twigs. 
Genus Dorcasta, Pascoe. 
Pascoe, Trans. Ent. Soe. n. s. iv. p. 264. 
In this genus the body is much more elongated than in any 
glabra; episternis, pectore segmentisque abdominalibus medio grosse 
punctatis. Long. 1} lin. Had. in Rio Janeiro. 
