786 mr. m. jacoby on new [Dec. 16, 



more distinct transverse groove between the eyes ; apex of the man- 

 dibulse piceous ; base of the head occupied at each side by a large 

 elongate black spot ; antennae short, black, pubescent. Thorax 

 nearly three times as broad as long, transversely impressed across 

 the entire disk, minutely punctured, flavous or rufous, with a large 

 round black patch at each side near the posterior margin, where the 

 puncturing is a little more distinct. Scutellum flavous, pubescent. 

 Elytra a little wider than the thorax, parallel or very little widened 

 posteriorly, exceedingly close and minutely punctured, of a dark 

 fuscous colour, and covered with thin whitish pubescence. Under- 

 side and the femora flavous ; knees, tibiae, and tarsi black. 



To be distinguished from C. macidicollis, Clark, by the larger 

 size, the two-spotted thorax, and by the minute punctuation of the 

 latter and of the elytra, while it differs from C. binotata, Dej., in 

 the coloration as well as the sculpture of the elytra. 



Genus Chthoneis, Baly. 



25. Chthoneis jansoni, sp. nov. 



Elongate, parallel. Black ; head and thorax flavous ; four apical 

 joints of the antennae testaceous ; elytra violaceous, closely punctured, 

 and transversely rugose. 



Length 3 lines. 



Hab. Chontales, Nicaragua. 



Head impunctate, deeply transversely grooved between the eyes ; 

 labrum and palpi piceous ; antennae as long as the body, closely 

 pubescent, with the exception of the first joint, second and third 

 joints short, black, the last four joints testaceous or flavous. Thorax 

 transverse, about twice as broad as long, anterior margin slightly 

 concave in the middle, sides narrowed at the base ; surface moderately 

 convex, impunctate, shining flavous. Scutellum black. Elytra wider 

 at the base than the thorax, closely and distinctly punctured ; the 

 interstices transversely wrinkled or semireticulate ; entirely dark 

 violaceous, semiopaque. Underside and legs black, covered with 

 whitish pubescence. 



The colour of the head and thorax principally distinguishes this 

 species from C. apicicornis, Baly. 



Collected by Mr. Janson. 



26. Chthoneis smaragdipennis, sp. nov. 



Elongate, parallel. Flavous ; antennae, tibiae, and tarsi black ; 

 thorax transversely foveolate ; elytra bright metallic green, closely 

 rugose punctate. 



Length 3-3 \ lines. 



Hab. Capetillo, Guatemala. 



Head not longer than broad, vertex with a few minute punctures, 

 carina and encarpae ill-defined ; antennae as long as the body in the 

 male, shorter in the female, second and third joint very small, 

 moniliform, fourth joint longer than the first three joints together. 

 Thorax subquadrate, its sides widened in the middle and contracted 



