182 MARTIN JACOBY 



rows of punctures which are not stronger than those of the 

 thorax, a narrow longitudinal depression accompanies the lateral 

 margin at its posterior portion but is not bounded above Ijy a 

 distinct edge ; tlie claws are appendiculate. 



66. Corynotles oliai ybons, Mabsu. 



t 



Bliamò, Teinzò, Rangoon. 



So many closely allied and similarly coloured species of 

 Cortjnodes have been described that it is no easy matter to 

 refer with certainty many forms to one or other type and a 

 detailed and careful description is absolutely necessary in most 

 instances to assist the determination of these insects, latin dia- 

 gnosis being almost valueless and even tlie best descriptions 

 cannot always convey a correct idea of the slight and variable 

 characters which separate many of the species. C. chalybcus of 

 which I was enabled to compare specimens contained in M^ 

 Baly's collection and which agree nearly with those obtained 

 by Signor Fea, varies considerable in size and seems closely 

 allied to A. asphodelus Marsh. ; the general colour of the upper 

 surface is violet, blue, or greenish and the insect belongs to a 

 section of the genus, which has the base of the elytra distinctly 

 raised into a round space , well visible to the naked eye ; in 

 the Burmah specimens which vary from 2 '/g to 4 lines, the head 

 is strigose at the vertex, but sparingly punctured towards the 

 episteme, the latter is separated from the face by a transverse 

 angulate groove, sparingly covered as well as the ocular grooves 

 witli whitish hairs ; there is also a triangular impressed fovea 

 placed at tlie middle of the line of separation ; the clypeus is 

 generally metallic green , closely and finely punctured ; the 

 labrum is black or piceous; the antenna.^ have a five-jointed 

 bluish black club , the basal joint metallic green and the two 

 following ones piceous; the thorax seems slightly variable in 

 shape, but may be described as about one lialf broader than 

 long , strongly narrowed in front where the sides are deeply 

 deflexed, the surface rather obscurely and sparingly punctured. 



