216 
behind with a very short basal appendage, 5 andsuturalsomewhat 
similar to 4 but shorter, interstices of the shortened striæ rather 
broad and flat, thereis a band of scattered puncturesalongtheapices; 
the propygidium has a few scattered ocellate punctures mostly 
placed near the base with some fine points intermixed and on the 
posterior area; the pygidium is punctured very similarly but 
appears smooth at the apex which is semicircular in outline; the 
prosternum very finely not thickly punctulate, lateral stria well- 
marked at the coxæ, slightly sinuous, fine anteriorly and feebly 
divergent; the mesosternum wide, anteriorly bisinuous, marginal 
stria complete; the anterior tibiæ unidentate. 
This species is flatter than any other known in the genus. 
ab. Falls of Samlia in the River N'Gamic (Mocquereys). 
Triballus corpulentus n. sp. 
T. onustus Zew. simillimus, sed fronte haud striala; thorace 
stria marginali antice interrupla; meso- metasternoque lævibus. 
— Long. vix 3 mill. 
Roundly oval,convex, black shining ; the head with a few large 
punctures intermixed with numerous fine points, without a frontal 
Stria; the thorax punctured like the head, marginal stria ceasing 
behind the neck; the elytra punctate, punctures not differing 
from those of the thorax, humeral striæ complete like those of 
T° agrestis Mars., and 7. onustus Lew ; the propygidium and pygi- 
dium evenly punctured, punctuation fineandsomewhat sparse; the 
prosternum, keel rather wide with two rather fine striæ feebly 
divergent anteriorly, truncate behind; the mesosternum, mar- 
ginal stria fine and at the sides only, separated from the metaster- 
num by a straight crenulate stria, all the sternal plates smooth; 
the antennæ brownish, club red. 
This species is more circular in outline than 7. onustus Lew. 
and without a frontal stria; the thoracic stria ceases behind the 
neck and the sternal plates are impunctate. 
Hab. Falls of Samlia, Riv. N'Gamic (Mocquereys). One example. 
QUELQUES COLÉOPTÈRES DU THIBET, 
par L. Fairmaire. 
Aurisma robusta. — Long. 19 mill. — Oblonga, postice 
leviter ampliala, modice convexa, æneo-viridis, metallica, subtus 
cum pedibus nigra, prosterno virescente ; capite antice nigricante, 
fronte plicatulo-rugala, utrinque impressa, clypeo fortius plicato, 
antennis brevibus, sat validis, prothoracis basin altingentibus, 
