South American species of Diahrotica. 25 



36. Diahrotica piceo-picta. 



Anguste oblonga, postice vix ampliata, pallide flava aut prasina, 

 nitida, tarsis, capitis vertice, antenuis scutelloqiie pallide piceis ; his 

 ad basin et ad apicem piceo-flavis ; thorace bifoveolato ; elytris 

 crebre punctatis, ad latera plicatis, utroque niaculis quatuor, inter se 

 plerumqne confluentibus, duabus basalibus, prima communi cunei- 

 formi, secunda humerali, una prope medium transversa, unaque 

 inter medium et apicem brnneis aut castaneis. 



Long. 2— 2^ lin. 



Hab. Upper Amazons (Garfell). My collection. 



Head scarcely broader than long ; longitudinal ridge on clypeus 

 well-defined ; labrum and eyes black ; antennae filiform, equal to 

 the body in length in the ^ , slightly shorter in the J , the second 

 and third joints very short, equal in length in the ^, the third 

 nearly one-half longer in the J ; pale piceous, the two lower 

 joints, together with the tenth and eleventh, the extreme apex 

 of the latter excepted, piceo-flavous (in some specimens these 

 two are not paler than the preceding ones). Thorax slightly 

 broader than long; sides rounded anteriorly, distinctJy sinuate and 

 slightly converging behind the middle ; disk shining, impunctate, 

 impressed on either side with a shallow fovea, which varies in 

 depth in different individuals. Elytra oblong, slightly dilated 

 posteriorly, convex, rather closely punctured, plicate below the 

 humeral callus, the subhumeral ridge bounded within by a broad 

 sulcation, which varies in depth and in some cases is almost 

 entirely obsolete ; in the more strongly-marked specimens there 

 are traces in addition of several shallow sulcations on the disk. 



This insect closely resembles D. atromaculata in the 

 pattern of its elytra, but is separated by the paler head, 

 foveolate thorax and plicate sides of the elytra. 



Spec. 37. Diahrotica atomaria, Jacoby. 



Proc. Zool. Soc, 1889, p. 284. 



Angaste ovata, postice ampliata, convexa, fulvo-flava, nitida, 

 pectore, scutello capiteque nigris, antennis pallide fuscis ad basin et 

 ante apicem flavis ; tibiarum anticorum dorso tarsisque nigro-piceis ; 

 thorace convexo, non foveolato ; elytris crebre distincte punctatis ; 

 flavis, utroque suturae basi, macula humerali, una mediali duabusque 

 pone medium, his transversim positis, nigris. 



Long. 2 lin. 



Hah. Colombia, Caracas. Coll. Simon and Jacoby. 



