512 MR. M. JACOBY ON NEW COLEOPTERA. [JunC 5, 



where evenly and finely punctate ; scutellum broadly triangular, with 

 a few fine punctures at each side, black. Elytra about twice and a 

 half as long as the thorax, distinctly widened towards the middle 

 and rounded at the apex, regularly punctate-striate, the punctures 

 only disappearing at the extreme apex, the interstices smooth and 

 shining ; their whole basal half is occupied by an almost square 

 patch of bright fulvous, while the posterior part is shining black, 

 and has at its apex another rounded spot of fulvous. Legs black, 

 covered, as well as the entire underside, with fine silky whitish hairs. 



Length 2 lines. 



Hab. Chontales, Nicaragua. 



Collected by Mr. M. Janson. 



This species will be easily distinguished from D. scutellaris by 

 the strong punctation of its head, the colour of the antennae, and 

 the design of its elytra. 



EuMOLPID^. 



Genus Metaxyonycha, Chevrol. 



4. Metaxyonycha tridentata, nov. sp. 



Subcylindrical, semiconvex, testaceous. Head with a distinct 

 fovea in the middle and an oblique depression below each eye, both 

 of which are deeply but sparingly punctate, lower part of face 

 sparingly punctate, testaceous, apex of mandibulae black ; antennae 

 nearly as long as the body, joints 5, 6, 7, and the last fuscous, the 

 rest flavous. Thorax very convex on the disk, anterior and posterior 

 margins parallel, the angles tuberculate ; the lateral margins very 

 widened in the middle, and at that place very distinctly three-den- 

 tate. A profound impression is placed on the surface on each side 

 near the middle ; and the entire disk is irregularly and coarsely punc- 

 tured. Scutellum smooth. Elytra much wider than the thorax, 

 the sides parallel, with about ten longitudinal more or less distinct 

 costse, which for the most part unite at their extremities, the inter- 

 vals of which are coarsely and deeply punctate ; each elytron with 

 two transverse spots of a shining metallic light green, the first 

 situated on the shoulder, of a nearly square shape, and extending 

 halfway across the elytra, the second below the middle, of a narrow 

 band-like shape, a little curved, and not touching the sutural margin. 

 Underside light testaceous as well as the legs. Tarsi a little darker. 



Length 4 lines. 



Hab, Chontales, Nicaragua. 



Collected by Mr. Janson. 



Genus Rhyparida, Baly. 



5. Rhyparida madagascariensis, sp. nov. 

 Oblong-ovate, entirely rufous, smooth, shining ; head with a 



more or less distinct longitudinal depression in the middle sparingly 

 but distinctly punctate ; clypeus testaceous, distinctly separated from 

 the face, the anterior edge emarginate and narrowly piceous, surface 

 punctured the same as the head ; labrum dark brown, mandibulae 



