1889. ] COLLECTED IN VENEZUELA. 277 
Monoptatvus (?) OBLITERATUS, i. Sp. 
Dark or paler fulvous, glabrous and impubescent ; palpi filiform ; 
thorax transverse, scarcely visibly grooved, finely punctured ; elytra 
distinctly punctate anteriorly, almost impunctate below the middle, 
the sides with a short longitudinal costa. 
Length 13-2 lines. 
Head rather strongly punctured at the vertex, the frontal tubercles 
divided by a deep longitudinal groove, the carina sharply raised and 
long, dividing the clypeus; palpi not incrassate; antenne not 
extending to half the length of the elytra, fulvous, the terminal 
joints darker and gradually thickened, the third joint slightly longer 
than the following joints ; thorax transverse, about one half broader 
than long, the sides slightly narrowed at the base and very obtusely 
angulate before the middle, the anterior angles obliquely produced 
outwards, the surface rather flattened, with a very obsolete transverse 
depression near the base, very finely and rather remotely punctured ; 
elytra only distinctly punctured at the anterior portion, the rest of the 
punctures nearly obliterated, the sides with a narrow but well- 
defined longitudinal ridge from the shoulder to near the middle, but 
varying in length; tibiee with two spurs; claws appendiculate. 
San Esteban. 
This species seems to possess most of the structural characters 
peculiar to Monoplatus, but differs in the very obsolete transverse 
thoracic groove, this in itself is, however, of no great importance, 
since the same groove in the genus Lactica and other genera is 
occasionally found to be similarly reduced; in the filiform palpi and 
the impubescent upper surface it agrees with Monoplatus. As regards 
the double tibial spurs, it should be understood that these are quite 
distinct in character and seem to me not to have been recognized as 
such by Clark; in many instances where this author speaks of two 
teeth or spurs, the inner one is simply the pointed projection of the 
tibize, while the other corresponds with the usuai spine found in 
nearly all Halticidee; this spine is generally much larger and placed 
more at the middle of the apex of the tibia. I. obliteratus agrees in 
colour with M. fulvus, Baly, but differs quite in the structure and 
shape of the thorax ; the female is larger, of darker colour, and the 
thorax and elytra are much more strongly punctured. 
OMoTOTUS CARINATUS, 0. Sp. 
Dark fuscous, spotted with fulvous and white ; head with a short 
ridge at the vertex ; antenne fulvous, joints 5-6 and 9—11 fuscous ; 
thorax with two anterior tubercles; elytra with strongly raised 
interstices, the disk spotted with fulvous, and three transverse rows 
of small white spots. 
Length 2 lines. 
Head covered with fulvous pubescence, the middle of the vertex 
with a short but distinct longitudinal ridge; antennz thickened 
at the terminal joint, the fifth and sixth and the three apical joints 
fuscous, the others fulvous ; thorax distinctly broader than long, 
Proc. Zoou. Soc.—1889, No. XIX. 19 
