284 MR. M. JACOBY ON COLEOPTERA [May 21, 
DIABROTICA SIMPLICIPENNIS, 0. 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 ; antenne 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, 0. sp- 
Fulvous ; the head and the breast black ; second and third joints 
of the antenne 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- 
tenn ; the frontal elevations small but very distinct ; clypeus with 
a central ridge ; antennee 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. 
San Esteban. 
DrABROTICA NIGROSTRIATA, Baly. 
San Esteban. 
Drasrotica optiva, Erichs. 
Two specimens from Caracas which I refer to this species (having 
