1878.] MR. M. JACOBY ON PHYTOPHAGOUS COLEOPTERA. 993 



margin anteriorly with another transverse band of a ^-shaped form, 

 and placed in the middle of the elytra), as well as a short rounded 

 band near the apex (this latter band being also connected with the 

 former one by a short vitta near the lateral margin), shining metallic 

 green ; the indexed margin of the elytra, as well as the underside 

 and the legs, testaceous. 



Hab. Costa Rica 1 



Collection Jacoby. 



Allied to D. vittaticollis, Still, but differing in the colour of the 

 head, antennae, and palpi, and the longitudinal stripe between the 

 second and third bands. 



22. SCELIDA BALYI, Sp. nOV. 



Elongate, parallel, testaceous ; vertex of head, last six joints of 

 antenna?, and the coxae black. Elytra metallic green, closely rugose- 

 punctate. 



Length 4| lines. 



Head impunctate, with two distinct tubercles between the an- 

 tennae, limited behind by a transverse groove, lower part of face 

 with a raised triangular ridge ; last joint of maxillary palpi piceous ; 

 vertex of head black, shining ; lower part and the basal five joints 

 of the antennas flavous, the latter about three fourths the length of 

 the body, with the three terminal joints slightly curved. Eyes pro- 

 minent, black. Thorax subquadrate, widened from the apex towards 

 the middle, from there straight to the base, the anterior and 

 posterior margins slightly sinuate in middle ; surface entirely im- 

 punctate, the disk depressed, flavous, with indistinct irregular 

 blotches of a piceous colour. Scutellum semiovate, dark piceous, 

 with a light-coloured margin. Elytra much wider at the base than 

 the thorax, sides entirely parallel, the surface covered throughout 

 with crowded and rather deep punctures, the intervals of which are 

 finely rugose, of a metallic, moderately shining green colour, which 

 assumes towards the apex aud near the suture a purplish hue. 

 Under surface and legs flavous, the base of the coxae and a spot at 

 the base of the anterior femora piceous or black ; the metathorax 

 on each side raised in the shape of a triangular-pointed elevation. 



This species is the second one belonging to this genus, the first 

 of which was published in diagnosis by Mr. Chapuis in his eleventh 

 volume of the ' Genera of Coleoptera.' From this species it is sufficiently 

 distinguished by its smaller size, the black vertex of the head, 

 together with the spots on the coxae of the legs, and by the peculiar 

 shape of the metathorax. 



23. DlABROTICA WATERHOUSEI, Sp. nOV. 



Elongate, convex, widened behind, flavous. Head, breast, and 

 the extreme base of the elytra pitchy black, the apex of the latter 

 brownish fuscous. 



Length 3 lines. 



Head shining black, with a distinct fovea between the eyes ; an- 

 tennae ferruginous, the basal joint flavous. Thorax quadrate, 



