South American species of Diahrotica. 61 



thoraceque rufis ; hoc plus minusve distincte trifoveolato, fovea 

 intermedia interdum obsoleta ; elytris distincte, sat crebre piinc- 

 tatis, utroque vitta suturali communi basali, ante medium abbre- 

 viata, altera sublaterali, a basi ad longe pone medium producta 

 maculaque oblonga discoidali pone medium posita, cyaneis aut 

 viridi aeneis. 



Var. A. Elytrorum vitta sublaterali interrupta. 



Var. B. Elyti'orum macula discoidali cum sutura confluenti. 



Long. 2^—3 lin. 



Hah. Bolivia, Upper Amazons, and Peru. My col- 

 lection. 



Head not longer than broad, subtrigonate ; clypeus with a broad 

 longitudinal rid;,'e ; eyes large, prominent ; antennae filiform, four- 

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

 the length of the second, the fourth equal to the preceding two 

 united ; pale piceous, the four basal joints beneath, together with 

 the three upper ones entirely, piceo-flavous. Thorax one-third 

 broader than long ; sides nearly parallel and slightly sinuate from 

 the base to beyond the middle, thence rounded and obliquely con- 

 verging towards the apex ; upper surface convex, hinder disk 

 moderately excavated, more or less distinctly trifoveolate, the 

 middle fovea, which is placed just in front of the basal margin, 

 sometimes obsolete. Elytra oblong-ovate, dilated posteriorly, 

 their apices conjointly regularly rounded; convex, distinctly punc- 

 tured, plicate below the humeral callus, the subhumeral costa 

 distinct, bounded within by a longitudinal sulcation. 



Spec. 107. Diahrotica piceo-signata. 



Subelongata, postice paullo ampUata, convexa, flava, nitida, 

 pectore capiteque nigris, antennis ad apieem flavis, thorace inferiori 

 utrinque macula scutelloque piceis ; thorace profunde bifoveolato, 

 foveis fusco piceis ; elytris subcrebre punctatis, utroque suturae 

 basi, vitta submarginali a basi fere ad apieem extensa, lineaque brevi 

 pone medium, inter vittam et suturam posita, nigris. 



Var. A. Thoracis maculis piceis obsoletis. 



Var. B. Elytrorum macula post-mediali obsoleta. 



Long. 3 lin. 



Hah. Brazil, Tejuca {Gray). My collection. 



Head triangular, not longer than broad ; clypeus with an ill- 

 defined longitudinal ridge ; antennae four-fifths the length of the 

 body, filiform, the second joint short, subovate, the third about 

 one-half longer than the second, the fourth equal in length to the 

 preceding two united ; black, the three upper joints flavous, the 



