1889.] COLLECTED IN VENEZUELA. 277 



MONOPLATUS (?) OBLITERATUS, 11. 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 1 i-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 iucrassate ; antennae 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 ; tibise 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 

 tibise, while the other corresponds with the usual spine found in 

 nearly all Halticidse ; this spine is generally much larger and placed 

 more at the middle of the apex of the tibia. M. 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, n. sp. 



Dark fuscous, spotted with fulvous and white ; head with a short 

 ridge at the vertex ; antennae 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 ; antennae thickened 

 at the terminal joint, the fifth and sixth and the three apical joints 

 fuscous, the others fulvous ; thorax distinctly broader than long, 



Proc. Zool. Soc— 1889, No. XIX. 19 



