South American species of Diahrotica. 45 



and third piceo-fulvous, the rest piceous, the two upper ones rather 

 paler than the rest. Thorax rather more than one-third broader 

 than long ; sides sinuate and slightly diverging from the base to 

 the middle, rounded anteriorly ; disk shining, bifoveolate. Elytra 

 oblong-ovate, slightly dilated posteriorly, convex, closely and dis- 

 tinctly punctured ; plicate below the humeral callus, disk of each 

 elytron with five or six shallow broad longitudinal sulcations. 



The more strongly punctured sulcate elytra, together 

 with the different form of the fulvous markings, will at 

 once separate the above insect from sexmaculata, mihi, 

 the only species with which it can be confounded. 



Spec. 78. Diahrotica gracilis, Jac. 



Proc. Zool. Soc, 1878. p. 150. 



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

 pectore, tibiis, tarsis, capite, scutello elytrorumque linea basali 

 communi nigi'is ; antennis ad basin prasinis, ante apicem tlavo- 

 albidis ; thorace bifoveolato ; elytris crebre i^unctatis, ad latera 

 plicatis ; utroque plagis duabus, ima basali, altera pone medium, 

 flavo-fulvis. 



Long. 2^ lin. 



Hah. Brazil. Unique in Mr. Jacoby's collection. 



Clypeal ridge well-defined ; antennae slender, filiform, the 

 second and third joints short, nearly equal, the fourth longer than 

 the preceding two united ; the basal joint pale green, the ninth 

 and tenth yellowish white. Thorax scarcely one-foiurth broader 

 than long ; sides parallel and distinctly sinuate from the base to 

 beyond the middle, thence obliquely converging towards the apex ; 

 disk deeply bifoveolate, nitidous, impressed with very minute 

 punctures, only visible under a deep lens. Elytra oblong-ovate, 

 scarcely dilated posteriorly ; convex, distinctly and rather closely 

 punctured ; plicate below the humeral callus, subhumeral costa 

 extending to just beyond the middle of the elytron, bifurcate at 

 its base. 



Spec. 79. Diahrotica hipustulata, Baly. 



Journ. Lin. Soc, xix , p. 221. 



Hah. Venezuela. In most collections. 



Spec. 80. Diahrotica amccna, Dalm. 

 Analect. Ent., 1823, p. 75. 

 Diahrotica Clarkella, Baly, Ann. & Mag. Nat. Hist., 



1859, p. 271. 

 Hah. Brazil. Common in collections. 



