South American species of Diahrotica. 49 



margin ; antennae filiform, four-fifths the length of the body, the 

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

 the preceding two united ; the two lower joints piceous, the three 

 upper ones obscure fulvous, the rest black. Thorax about one- 

 half broader than long ; sides sinuate and nearly parallel from the 

 base to just beyond the middle, thence obliquely converging and 

 slightly rounded towards the apex ; above convex, slightly exca- 

 vated on the hinder two-thirds of the disk, obsoletely trifoveolate. 

 Elytra oval, slightly dilated posteriorly; convex, rather broadly 

 margined ; above convex, subuitidous, distinctly punctured, obso- 

 letely plicate below the humeral callus, disk faintly impressed with 

 several ill-defined longitudinal sulcations. 



Spec. 87. Diahrotica Clarkella, Baly. 



Proc. ZooL Soc, 1889, p. 93. 



Subelongata, postiee paullo ampliata, modice convexa, flava, 

 nitida, dorso interdum fusco tincto, pectore antennisque nigris, his 

 ad basin et ad apicem fulvis ; thorace convexo, disco excavato, plus 

 minusve distincte bifoveolato ; elytris crebre punctatis, ad latera 

 plicatis ; utroque vittis basalibus brevibus duabus, una communi, 

 altera humerali, maculisque duabus pone medium, oblique trans- 

 versim positis, nigris. 



Var. A. Elytrorum maculis posticis confluentibus, capite nigro- 

 piceo. 



Long. 85 — 4 lin. 



Hab. Brazil, Petropolis, Constantia (Gray). In 

 most collections. 



Head not longer than broad ; clypeal ridge only slightly raised, 

 not well-defined ; antennae rather more than three-fourths the 

 length of the body, filiform, the second joint short, the third 

 scarcely one-half longer, the fourth equal in length to the preceding 

 two united ; the three lower and the three upper joints, together 

 with the basal portion of the fourth, flavo-fulvous, the rest black. 

 Thorax one-third broader than long; sides sinuate and nearly 

 parallel from the base to the middle, thence sUghtly converging 

 towards the apex, the anterior angles slightly thickened, obtuse, 

 the hinder ones acute ; above convex, the medial disk broadly 

 excavated, impressed on either side with a shallow fovea. Elytra 

 narrowly ovate, slightly dilated posteriorly, their apices regularly 

 rounded ; above convex, rather closely and strongly punctured, 

 obsoletely rugulose, plicate below the humeral callus. 



In some specimens the surface immediately sur- 



TRANS. ENT. SOC. LOND. 1890. — PART I. (APRIL.) E 



