1878.] MR. M. JACOBY ON PHYTOPHAGOUS COLEOPTERA. 151 



ferruginous ; thorax of the same shape as that of D. gracilis, obliquely 

 bifoveolate, green, impunctate ; scutellum black ; elytra a little 

 widened behind the middle, distinctly longitudinally sulcate below 

 the shoulder, surface closely punctured, green, an irregular blotch 

 on the shoulders, a small elongate, triangular sutural mark near the 

 base and below the scutellum, and a transverse narrow spot near the 

 apex of each elytron, not touching the margin or the suture, black. 

 Underside and legs exactly as in D. gracilis. 



Length 2^ lines. 



Hab. Ecuador. 



Two specimens, collected by Mr. Buckley, in my collection. 



18. DlABROTICA VARIOLOSA, Sp. nOV. 



Oblong, convex, widened behind, entirely dark green ; head and 

 disk of thorax dark fuscous ; head impunctate, with a fovea in 

 middle and a highly raised ridge between the antennae ; the latter 

 with the second and third joints very short, the three basal joints 

 light green, the following three flavous, and the rest ferruginous ; 

 thorax quadrate, rather convex, the disk with two foveae and an 

 indistinct transverse fuscous mark ; scutellum triangular, black ; 

 elytra convex, much widened towards the apex, and coarsely and 

 irregularly variolose and punctured, of a dark green colour. Under- 

 side pitchy black, femora green ; the breast on each side covered 

 with a longitudinal patch of golden-yellow hair, and the abdominal 

 segments margined with long greenish hair, which also covers the 

 legs. 



Length 3 lines. 



Hab. Ecuador. 



One specimen in my collection. 



This species is allied to D. marginata of Sturm, but is devoid of 

 the brownish margin round the elytra, and is distinguished by the 

 colour of the underside and legs as well as of the antennae. 



"t>~ 



19. DlABROTICA PERUANA, Sp. nOV. 



Elongate, convex, much widened behind, black beneath ; thorax 

 flavous ; elytra flavous, with the base and a large spot near the apex 

 bluish black ; head impunctate, with two distinct tubercles in front 

 of the usual middle fovea; antennae long, filiform, entirely black; 

 thorax subquadrate, impunctate on the disk, with two foveas near the 

 sides light flavous; scutellum black; elytra of the same colour as 

 the thorax or a little lighter, with a broad band at the base, not 

 touching the lateral margins, and a large subquadrate spot behind 

 the middle bluish black ; the punctuation on the disk very distinct 

 and even coarse towards the base. The entire underside with the 

 legs and tarsi black, finely covered with yellowish hair. 



Length 3| lines. 



Hab. Peru. 



20. DlABROTICA SEXPLAGIATA, Sp. UOV. 



Elongate, parallel ; head and thorax testaceous, the latter with a 



