8 Mr. Joseph S. Baly on the 



apicali fasciaque prope medium, utrinque abbreviata, albidis aiit 

 flavo-albidis. 



Var. A. Elytrorum limbo laterali toto nigro, macula sub- 

 basali externa obsoleta. 



Mas. Antennis corpore longioribus ; abdominis segmento anali 

 apice leviter simiato, disco transversim couveso. 



FcEM. Antennis corpore brevioribus. 



Long. 3 — 4 lin. 



Hab. Cayenne. My collection. 



Head slightly longer than broad in the <y , as broad as long in 

 the 2 > triangular ; clypeus with an ill-defined longitudinal ridge ; 

 antennae filiform, rather longer than the body in the ^ , two-thirds 

 its length in the ? ; the second and third joints short, nearly equal 

 in length in the ^, the third distinctly longer than the second in 

 the other sex ; black, the three lower joints piceous, the three 

 upper ones, the outer half of the apical one excepted, yellowish 

 white. Thorax one-half broader than long ; sides nearly parallel 

 and sinuate firom the base to beyond the middle, thence rounded 

 and obliquely converging towards the apex ; anterior angles 

 thickened, obliquely truncate, the hinder ones subacute ; disk 

 smooth, convex. Elytra oblong-ovate, slightly dilated posteriorly, 

 their apices conjointly regularly rounded ; above convex, distinctly 

 punctured, the punctures finer below the middle. 



Distinctly separated from the preceding species by the 

 narrower form in both sexes, and by, the filiform antennsB 

 and sinuate apex of abdomen in the male. 



Spec. 6. Diabrotica alboplagiata, Jac. 



Anguste ovata, postice pauUo ampliata, convexa, flava aut flavo- 

 fulva, nitida, tibiis, tarsis, pectore, scutello capiteque nigris, anten- 

 narum articulis ultimis tribus, ultimi apice excepto, albidis ; 

 thorace convexo, laevi ; elytris sat crebre punctatis ; nigris, utro- 

 que limbo externo, pustulis duabus infra basin, interna magna, 

 rotundata, externa parva, ad Umbum adfixa, fascia vix infra 

 medium curvata, utrinque abbreviata, pustulaque ante apicem, 

 rotimdata, flavo-albidis aut albidis. 



Var. A. Elytrorum limbo albido externo obsoleto. Diabrotica 

 alboplagiata, Jac, Cist. Ent., iii., p. 47. 



Var. B. Elytrorum maculis inter se plus minusve conflu- 

 entibus. 



Mas. Antennis corpore longioribus ; abdominis segmento anali 

 leviter emarginato, disci medio concavo. 



Loi:^. dl — 4 lin. 



