286 MR. M. JACOBY ON coLEOPTERA [May 21, 



antennae piceous ; thorax deeply transversely sulcate ; elytra finely 

 punctured, an angulate mark at the base and another semilunate 

 spot near the apex obscure dark fulvous. 



Var. The elytral markings replaced by spots or streaks (1,2, 2). 



Length 2-3 lines. 



Head impunetate, with a deep fovea between the antennse, dark 

 fulvous, the vertex more or less piceous ; antennae half the length 

 of the body, the fifth to the eighth joints piceous, the others fulvous ; 

 thorax scarcely one half broader than long, the sides straight at the 

 base, the surface impunetate, with a deep transverse somewhat sinuate 

 sulcation ; elytra finely punctured, scarcely shining, with traces of 

 longitudinal grooves, obscure testaceous, the base with an angular 

 piceous mark, extending to one third the length of the elytra, a 

 semicrescent similar-coloured mark is placed below the middle ; legs 

 and underside fulvous. 



Caracas and San Esteban. 



N. dimidiaticornis resembles greatly several other species of the 

 same genus in colour and the design of the elytra, but is principally 

 distinguished by the dark intermediate joints of the antennae and the 

 rather less transversely shaped thorax : in the variety the elytra 

 have a small spot placed on the shoulder, two before the middle 

 placed transversely, and two others below the latter ; these spots are 

 sometimes partly connected and indicate the pattern in the specimen 

 which I have taken for the type. The appendiculate claws and deeply 

 sulcate thorax will prevent the species for being mistaken for a 

 Diahrotica. 



Neobrotica variabilis, Jac. 



Var. Antennae entirely fulvous. 



From Corozal. 



The two specimens contained in this collection agree in every way 

 with the Mexican form described by myself in the ' Biologia Centrali- 

 Americana,' except in the colour of the antennije, which are fulvous 

 as well as the legs. As the species seems, however, to vary in these 

 respects, I think that the Venezuelan insects are but another local 

 form of the type. Neobrotica is at once distinguished from Diubrotica 

 by the transverse sulcation of the thorax, the longer first joint of 

 the posterior tarsi, and the appendiculate claws. 



Neobrotica (sub Diabrotica) oberthuri, Baly. 



Corozal. 



CCELOMERA CAYANENSIS, Fabf. 



From San Esteban. 



MaLACORHINUS UNDECIMPUNCTATUS, n. Sp. 



Obscure testaceous ; the apical joints of the antennae fuscous ; 

 thorax extremely finely punctured ; elytra very. closely and more dis- 

 tinctly punctured, with eleven black spots (2, 3, 4, 2). 



Length 2 lines. 



Head impunetate, deeply transversely grooved between the eyes ; 



