994 MR. M. JACOBY ON PHYTOPHAGOUS COLEOPTKRA. [Dec. 3, 



rather convex, smooth, narrowed towards the base, surface shining, 

 flavous. Scutellum black. Elytra widened towards the apex, 

 rather convex, light flavous, a narrow transverse band at the base 

 undulated at its posterior edge, and extending to the humeral callus, 

 dark fuscous or black ; the posterior third of the elytra fuscous 

 brown, surrounded by an indistinct crescent of a darker colour ; the 

 rest of the surface covered with minute piceous spots, visible only 

 under a lens. Underside black ; abdomen brownish ; legs flavous, 

 the hinder tibiae on their outer side blackish. 



Var. Thorax at the anterior margin with a triangular black spot ; 

 the apical markings of the elytra obsolete. 



Hab. Cache, Costa Rica. 



Collected by Mr. Rogers. 



24. DlABROTICA JANSONI, Sp. 110V. 



Elongate, convex, widened behind, fulvous. Thorax and elytra 

 closely punctate, a large oval patch near the apex of the latter 

 violaceous blue. 



Length 4|-5 lines. 



Head with a deep transverse groove, closely punctured, fulvous ; 

 antennae robust, as long as half the length of the body, fuscous, 

 the first joint below fulvous, the fourth joint nearly double the 

 length of the third. Thorax transverse, sides nearly parallel, with 

 three indistinct shallow depressions on the disk, of which two 

 smaller ones are situated on each side and a large one near the 

 posterior margin at its middle ; surface distinctly but not very 

 closely punctate, fulvous. Scutellum broad, triangular, its surface 

 very finely alutaceous, and slightly excavated near the base. Elytra 

 more than four times the length of the thorax, much widened 

 towards the apex, and distinctly margined ; the surface crowded 

 everywhere with distinct punctures of the same colour as the head 

 and thorax, the whole of the posterior third occupied by a large 

 rounded spot of violaceous blue, which sometimes terminates at some 

 distance from the apex. Underside and the femora testaceous ; 

 tibiae and tarsi fuscous. 



Hab. Chontales, Nicaragua. Collected by Mr. Janson. 



In my collection. 



25. DlABROTICA FUSCOMACULATA, Sp. nOV. 



Testaceous below. Head, thorax, and elytra olive-green, the 

 latter obsoletely costulate, with the base and two spots on each 

 elytron dark fuscous, margined with pale yellow. 



Length 2\ lines. 



Head impunctate, with a fovea in the middle, shining green ; 

 labrum dark brown ; antennae nearly reaching to the end of the 

 body, with the second and third joint very short, the fourth three 

 times as long as the second joint, of an indistinct brownish colour, 

 the first joint pale greenish. Thorax bifoveolate, impunctate, very 

 shining olive-green. Scutellum flavous. Elytra subdepressed, 



