of the Amazon Valley. 19 
I met with one example only of this most charmmg species, 
at S. Paulo on the Upper Amazons, where it was found sunning 
itself on a leaf on the banks of one of the brooks which run 
through the virgin forest. 
Genus Cosexura, Erichson. 
Erichson, Conspectus Ins. Coleop. Peruana, p. 149. 
The founder of this genus likened it to Colobothea, mention- 
ing as the only characters which distinguish it the depressed 
body and tumid mesosternum. Cobelura, however, differs from 
all the genera of the group Colobotheine in wanting the acute 
prominent shoulders and sharp lateral carinz of the elytra which 
are characteristic of the group. The genus is more nearly allied 
to Nyssodrys and Hylettus, differmg from both chiefly m the 
elongate-elliptical shape of the body (which assimilates the spe- 
cies to the Colobothee), unarmed sides of the thorax, tumid 
mesosternum, and small size of the lower lobe of the eyes. The 
only species described by Erichson is the C. lorigera, inhabiting 
the forest region of Eastern Peru, which differs greatly from the 
following in colours and markings. 
Cobelura proliza, u. sp. 
C. elongata, subdepressa, postice paulo attenuata, olivaceo-grisea : 
thorace vitta lata mediana fusca, nigro marginata : elytris maculis 
irregularibus discoidalibus alteraque laterali majore triangulari 
ante apicem fuscis, leviter tricostatis. Long. 7} lin. ¢. 
Head clothed with tawny pile. Antenne reddish, bases of 
the joints pallid or ashy, apices dusky. Thorax much broader 
than the head, and much narrower than the elytra, convex and 
rounded on the sides, the broadest part being the middle; sur- 
face olivaceous or tawny ashy, the middle occupied by a broad 
dusky vitta bordered by black lines; there is also a dusky vitta 
on each side below the lateral dilatation. Elytra elongated 
and rather depressed; shoulders prominent, but obtuse; apex 
obliquely sinuate-truncate, with both angles of the truncature 
produced (the external one most so), sides destitute of carine ; 
surface of each with three smooth cost, the imnermost only 
strongly pronounced, covered with minute punctures, each bear- 
ing a short bristle; dull greenish ashy, with small dark-brown 
specks and a larger triangular dark-brown spot on the sides 
near the apex. Body beneath obscure tawny ; middle of breast 
and abdomen, and terminal segment of the latter, blackish. 
Legs greenish tawny ; tibize and tarsi ringed with black. Meso- 
sternum with a very large rounded tubercle. 
$ Terminal abdominal segment with both ventral and dorsal 
plates deeply notched. 
9 
