272 Mr. Martin Jacoby’s List of the Phytophagqous 
flattened, the disc with some slight depressions at the sides ; scu- 
tellum triangular, black ; elytra very closely, evenly, and distinctly 
punctured, obscure metallic bluish-black or violaceous, with a short 
transverse flavous band or spot at the middle and another near the 
apex, these markings sometimes connected at the suture and form- 
ing fasciz, the extreme lateral margins also flavous, as well as the 
epipleurz ; underside and legs piceous, the base of the tibiz and 
the extreme apex of the femora sometimes paler, 
Hab. Grenada—Mount Gay Estate (Leeward side), 
Caliveny Estate (Windward side). 
This Gidionychis may, perhaps, best be compared with 
O. chapuisi, Jac., from the Amazons, in which the elytra 
are very similarly coloured ; but in that species they are 
nearly smooth and impunctate, and of a bright metallic 
blue or green. The present species is, however, like 
most of its kind, subject to variation: in one specimen 
the central spot assumes the shape of a narrow trans- 
verse band, which extends to the suture; while in 
another the posterior portion of the elytra may be de- 
scribed as flavous, with the suture, a narrow stripe across 
it, a spot at the sides, and the apex, blackish-blue. 
(dionychis sharpi, sp. n. 
Black ; thorax flavous, impunctate ; elytra very closely and dis- 
tinctly punctured, flavous, with a broad sutural and a sublateral 
stripe, extending from the base to near the apex, metallic dark blue. 
Length, 2-23 lines. 
Head rugosely punctured, black, the vertex with two obscure 
fulvous spots, the clypeus flavous or fulvous ; antenne scarcely 
extending to the middle of the elytra, black, the basal joint flavous 
beneath, the third and fourth joints equal; thorax more than twice 
as broad as long, the sides slightly converging in front, but little 
rounded, the anterior angles acute, but scarcely produced, the disc 
impunctate, flavous, the lateral margins narrowly flattened ; scu- 
tellum black ; elytra gradually widened towards the middle, closely 
and rather strongly punctured, flavous, the suture with a broad 
dark blue stripe, extending to the apex and slightly constricted 
below the middle, the sides with a narrower similarly coloured stripe, 
not touching the margin nor extending to the apex, the epipleurz 
flavous, more or less obscure piceous along their inner margin ; 
underside and legs black, the abdominal segments more or less 
edged with flavous. 
