344 MB. J. BALT OK NEW SPECIES 



in a compressed tuberosity, the apex of which is directed back- 

 wards ; the second commences near the scutellum and runs pa- 

 rallel to the suture, terminating a little below the middle of the 

 elytron, at its apex it is connected by a short, strongly raised, 

 transverse costa with the first ridge, at its base and again at its 

 middle it is furnished with a compressed acute tuberosity; the third 

 raised line commences just within the humeral callus, and, curving 

 gradually inwards, unites with the central ridge at about the end 

 of the anterior third of its course ; placed obliquely on the outer 

 disk below the middle are two raised tubercles, the anterior one 

 ill-defined, the hinder one strongly raised ; parallel to these, placed 

 between the median longitudinal ridge and the suture, is a small 

 oblong tubercle. Pygidium, together with the sides and apex of 

 abdomen, nigro-piceous, the former with a narrow raised median 

 vitta. 



Chlamys placida, n. sp. Subquadrata, valde convexa, castanea 

 piceo tincta, opaca, antennis extrorsum nigris ; thorace utrinque for- 

 titer punctate, disco modice gibboso, gibbere elevato-reticulato, apice 

 leviter canahculato ; elytris fortiter punctatis, granuloso-rugosis, 

 utrinque carinis longitudinalibus tribus, prima curvata, basi et apice 

 magis elevata, a basi juxta scutellum ad suturam ante medium pro- 

 ducta, duabusque flexuosis, a basi fere ad apicem extensis, instructis. 

 Long. 2§ lin. 



Hah. Ega, Upper Amazons. 



Head opaque, distantly punctured ; face broadly excavated lon- 

 gitudinally between the upper portion of the eyes ; anterior 

 border of clypeus concave ; antennae much shorter than the 

 thorax, robust, the eight outer joints compressed and dilated, the 

 six upper ones black. Thorax opaque, granulose, impressed, but 

 not closely, with large, deep, round punctures, those on the sides 

 at the base piceous, the basal margin also narrowly edged with 

 piceous ; disk gibbose, surface of the gibbosity elevate-reticulate, 

 its apex very obtuse, longitudinally canaliculate ; on each side the 

 gibbosity at the base is an oblique depression. Elytra dehiscent 

 at the extreme base, scarcely broader than the thorax, opaque, 

 strongly and deeply punctured, many of the punctures furnished 

 each with a single, very short, sericeous scale ; the anterior disk 

 stained with piceous ; each elytron with three longitudinal ridges, 

 the first short, curved, arising at the base close to the scutellum, 

 and terminating on the suture before its middle, thickened and 

 subtuberculate both at base and apex ; the second commencing on 



