80 Mr. Joseph S. Baly on the 



This species agrees with D.fiilvo-flava in the trans- 

 verse sulcation of the elytra, but differs in the presence 

 of the subhumeral pKcation. 



Spec. 147. Diahrotica ixdlescens. 



Subelongata, postice ampliata, convexa, dorso leviter deplanato, 

 pallide viridi-flava, oculis nigris, tibiis tarsisqiie piceo-tinctis, 

 antenuis piceis, ad basin et ante apiceni pallidis ; thorace lievi ; 

 elytris sat crebre tenuiter punctatis, ad latera plicatis. 



Long. 3 lin. 



Hah. Upper Amazons. My collection. 



Head not longer than broad ; labrum pale piceous ; clypeal ridge 

 prominent, well-defined; antennae filiform, rather more than four- 

 fifths the length of the body, the second joint short, the third more 

 than one-half longer, the fonrth rather longer than the preceding 

 two united ; the three or four lower joints, together with the ninth 

 and tenth pale flavo-piceous, the rest piceous. Thorax very slightly 

 broader than long ; sides nearly straight and parallel from the 

 base nearly to the apex, slightly converging close to the latter ; 

 disk moderately convex. Elytra oblong, dilated posteriorly, their 

 apices conjointly obtusely rounded ; above convex, slightly but 

 distinctly flattened along the suture ; minutely punctured, strongly 

 plicate below the humeral callus. 



The flattened upper surface of the elytra separates 

 this species from any others in the present group. 



Spec. 148. Diahrotica piceicoDiis. 

 Proc. Zool. Soc, 1889, p. 93. 



Anguste ovata, postice pauUo ampliata, convexa, flava, nitida, 

 plus minusve viridi-tincta, antennis pallide piceis, oculis nigi'is ; 

 thorace elytrisque pallide prasinis, illo bifoveolato, his tenuiter sub- 

 crebre punctatis, disco exteriori obsolete longitudinaliter siilcato ; 

 tarsis piceo-tiuctis. 



Long. 3 lin. 



Hah. Brazil, Rio Janeiro, Petropolis (Gray). My 

 collection. 



Head not longer than broad, subtrigonate ; clypeus with a 

 strongly raised longitudinal ridge ; antennae nearly equal to the 

 body in length, slender, filiform, the second joint short, moniliform, 

 the third neaidy equal in the ^ , one-half longer in the $ , the 

 fourth equal in length to the preceding two united. Thorax about 



