10 COLEOPTERA CHLAMYDAE. 



to a little more than antereor third, then parallel to obtuse ; apex mar- 

 gined, channeled and with a line of punctures ; length 4 mm. 



Type. — Isthmus of Tehuantepec (Sumichrast): formerly in 

 the collection of G. D. Smith, of Cambridge, Mass., and 

 labelled with the above name by the late G. R. Crotch. 



Form is subquadrate, compressed behind the humerus, 2d 

 joint of antenae rounded, 3d short and trigonate, the punctua- 

 tion of the thorax is thick and fine, becoming coarse and ru- 

 gose on the tip of the hump and edges of the sulcus, which 

 widens at the anterior apex and is marked on either side by the 

 usual ridges ; the common lateral tubercle is only indicated by 

 a very faint swelling, the sides of the hump are marked by 

 darker clouds, and abruptly declivous, the markings of the 

 elytra are vague, though viewed from behind a little to one 

 side, the humeral ridge shows up plainly, while there are 

 plenty of small tubercles and fragments of lines, nothing 

 marked to catch the eye, body beneath coarsely reticulate ; 

 somewhat resembles in appearance a very small specimen 

 of discipennis Jac. without the thoracic spots of that form ; 

 owing to the form of the thorax I place this provisionally 

 in the natteri group though the usual elytral tubercles are 

 wanting. 



Among my material is a chestnut brown 9 example from 

 Maroni, Guiana, which I place provisionally as a var. of 

 schottii Lac. It seems, however, to have many points of dif- 

 ference, a few more examples, especially 9 , are needed. 

 Lacordaire speaks of an entirely reddish form of schottii, I 

 have not seen any such, and all my examples are from Brazil 

 or Amazons. 



Chlamys plagiata nov. sp. Subquadrate, luteus, some spots on 

 head and front of thorax and a large diamond-shaped spot taking 

 in the hump of the thorax and extending beyond the middle of the 

 elytra, velvety black, a little diluted at the rear end of the thoracic 

 sulcus ; pygidium with fine median carina and a deep lateral elongate 

 fovae ; prosternum gradually narrowed to about posterior two-thirds, 

 then parallel to apex ; length 3-3^ mm. 



Type. — cf ; Cochabamba, Bolivia ; two c? and 9 speci- 

 mens. 



