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



DiABROTICA SIMPLICIPENNIS, n. Sp. 



Ovate, dilated posteriorly, black ; thorax transverse, testaceous ; 

 elytra very minutely punctured, testaceous. 



Length 2 lines. 



Head black, impressed with a fovea at the middle of the vertex, 

 the clypeus sparingly clothed with whitish hairs ; antennoe two thirds 

 the length of the body, black, the third and fourth joints elongate ; 

 thorax twice as broad as long, impunctate, impressed with a rather 

 deep fovea at each side ; scutellum black ; elytra rather strongly 

 dilated posteriorly, extremely finely punctured ; underside and legs 

 black. 



Corozal and Colonia Tovar. 



Allied to D. robusta, Baly, but differing in the black head and 

 underside and in the entirely testaceous elytra ; from D. dilatata, 

 Jac, the present species differs in the testaceous not black thorax. 



DiABROTICA ATOMARIA, U. Sp. 



Fulvous ; the head and the breast black ; second and third joints 

 of the antennae very short ; thorax finely punctured, non-foveolate ; 

 elytra flavous, closely punctured, a triangular spot on the shoulders, 

 another at the middle, and two spots near the apex, black. 



Length 2 lines. 



Head impunctate, black, shining, with a fovea between the an- 

 tennse ; the frontal elevations small but very distinct ; clypeus with 

 a central ridge ; autennse about half the length of the body, entirely 

 fulvous, the second and third joints very small and equal, the fourth 

 as long as the three preceding joints together ; thorax about one 

 half broader than long, the sides straight at the base, rather sud- 

 denly rounded before the middle, the surface without depressions, 

 very finely and irregularly punctured, fulvous, shining ; scutellum 

 black ; elytra slightly widened posteriorly, very closely and rather 

 strongly punctured, flavous, the suture below the scutellum, a tri- 

 angular spot on the shoulder, a rounded spot at the middle, and 

 two smaller spots placed transversely near the apex, black ; legs 

 fulvous ; breast black. 



Caracas. Two specimens. 



Allied to D. spilota, Baly, and several other species, but differing 

 in the position and shape of the elytral spots and their stronger 

 punctuation ; of the spots the middle one is placed close to the 

 lateral margins and the two apical spots are nearly joined, forming a 

 semicrescent. 



DiABROTICA BIMACULATA, Baly. 



Saa Esteban. 



DiABROTICA NIGROSTRIATA, Baly. 



San Esteban. 



DiABROTICA OBTivA, Erichs. 



Two specimens from Caracas which I refer to this species (having 



