SoiitJt American species of Diahrotica. 79 



Spec. 145. Diahrotica tihialis. 



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

 antennis piceo-nigris, ad basiu et ante apicem flavis, tibiis extrorsum 

 piceis, thorace convexo, nitido ; elytris teniiissime punctatis. 



Long. 3i lin. 



Hah. Cayenne. My collection. 



Head not longer than broad, triangular ; clypeal ridge rather 

 strongly elevated, entire ; antennae four-fifths the length of the 

 body, filiform, the second and third joints short, equal, the fourth 

 longer than the preceding two united ; the four lower joints, 

 together with the ninth and tenth, flavous, the rest pitchy-black. 

 Thorax nearly one-half broader than long ; sides nearly straight 

 and parallel behind the middle, very slightly produced laterally 

 just before the latter, thence slightly converging towards the apex ; 

 disk convex, entire, impunctate. Elytra oblong, slightly dilated 

 towards the apex ; convex, plicate below the humeral callus, the 

 subhunieral ridge strongly developed, extending downwards to 

 nearly half-way between the middle and apex ; surface very 

 minutely punctured, the puncturing only visible under a lens. 



Spec. 146. Diahrotica full- cola. 



Ovata, postice paullo ampliata, convexa, fulvo-flava, nitida, 

 pectore nigro, capite nigro-piceo, antennis ad basin fulvis, ante apicem 

 albidis, thorace convexo, Itevi ; elytris sat crebre tenuiter punctatis, 

 prope medium transversim impressis. 



Long. 3^ lin. 



Hah. Amazons [Bates). My collection, a single 

 specimen. 



Head not longer than broad, triangular, nigro-piceous, labrum 

 black, clypeus rufo-piceous, its longitudinal ridge well-defined ; 

 antennae filiform, nearly four-fifths of the body in length, the 

 second joint short, the third nearly one-half longer, the fourth 

 longer than the preceding two Tinited ; the three lower joints 

 piceo-fulvous, the ninth and tenth j-ellowish white, the rest nigro- 

 piceous. Thorax more than one-half broader than long; sides 

 nearly parallel and very slightly sinuate from the base to beyond 

 the middle, thence obliquely rounded and converging towards the 

 apex ; disk convex, nitidous. Elytra oblong-ovate, dilated pos- 

 teriorly, convex, slightly plicate below the humeral callus, trans- 

 versely depressed near the suture below the basilar space and again 

 more strongly immediately below the middle of the disk. 



