1889.] COLLECTED IN VENEZUELA. 



283 



a rounded spot before and another below the middle, obscure 

 piceous, 



Var. The anterior elytral spot absent. 



Length 2-2| lines. 



Head obscure testaceous, the vertex impunctate, the lower part 

 vertical, the clvfieus with a central ridge ; labrum black ; antennte 

 more than two' thirds the length of the body, testaceous, the basal 

 three joints piceous, the third joint distinctly longer than the second 

 but shorter than the fourth joint ; thorax one half broader than 

 long, narrowed towards the base, the disk flat, with a transverse 

 depression near the base, finely punctured and somewhat rugose or 

 finely wrinkled ; scutellum piceous ; elytra flattened, slightly widened 

 posteriorly, the sides with a longitudinal ridge commencing at the 

 shoulder and extending below the middle, the surface finely and 

 closely punctured and rugose, a small rounded spot near the base 

 and a larger one below the middle as well as the suture anteriorly, 

 piceous ; underside and legs testaceous, the tibia) and tarsi sometimes 

 piceous. 



Colonia Tovar. 



The long antennae, finely rugose thorax and elytra, in connexion 

 with their pattern are tlie principal characteristic distinctions of this 

 species ; although there is only one typical and three specimens 

 representing the variety before me, I think that the former probably 

 represents the normally coloured form. 



DiABROTICA NIGRODORSATA, U. Sp. 



Flavous ; the head, scutellum, and the sides of the breast black ; 

 thorax fulvous, bifoveolate ; elytra closely punctured, black, narrowly 

 margined with flavous. 



Male. Head deeply excavated below the antennae. 



Length 2-2i lines. 



Head black, impunctate ; antennae two thirds the length of the 

 body, pale flavous, the apical four joints piceous, third joint elongate, 

 as long as the fourth; thorax about one half broader than long, fulvous, 

 stained with piceous, the disk impunctate, with two deep fovese ; 

 scutellum black ; elytra closely and strongly punctured, black, the pos- 

 terior portion of the sutural, the lateral and basal margin narrowly 

 and the apical one more broadly flavous ; legs and abdomen flavous. 



Colonia Tovar. 



The female has a simple, not excavated head ; in both sexes the 

 basal flavous margin is irregularly notched at its posterior edge. 



DiABROTICA BOnviANA, Harold. 

 San Esteban. Three specimens. 



DiABROTICA R03USTA, Baly. 



A single specimen from San Esteban. 



DiABROTICA SERRATICORNIS, Baly. 



A single specimen from San Esteban. 



