36 MARTIN JAOOBY 



tuation of the elytra in N. gemella is at the same time more 

 strongly impressed. The female insect of the present species does 

 not differ from the male except in its larger size and the very 

 distinctly raised longitudinal clytral costae which are visible 

 nearly over the entire disk. 



22. Nisoti'a, clxrysomeloidcs , n. sp. 



Ovate , subquadrate , below piccous ; head , thorax , five basal 

 joints of the antennae and the legs fulvous; elytra dark blue, 

 distinctly semipunctate-striate. 



Length 2 lines. 



Head impunctate ; frontal tubercles absent ; episteme flattened, 

 subtrigonate ; antennae rather robust, the five basal joints ful- 

 vous, the rest black; thorax more than twice as broad as long, 

 slightly narrowed towards the apex , the anterior angles pro- 

 duced outwards and limited within by a deep longitudinal groove; 

 surface finely and closely punctured, scutellum fulvous; elytra 

 narrowed from below the middle to the apex , rather strongly 

 punctured, the punctuation arranged here and there in double 

 rows, the interstices also finely punctate and slightly rugose. 



Borneo, Sarawak (J. Doria and 0. Beccari). 



I have separated this species from the proceeding one on ac» 

 count of its more squareshaped form which resembles somewhat 

 that of a species of Phaedon amongst the Ch)'ysomelidae ; the 

 colour of the elytra is a dark violaceous blue and the punctua- 

 tion is more strongly impressed ; lastly the size of the insect is 

 larger than that of N. gemella with which it has the deep tho- 

 racic groove in common. 



Ghaloenus, Westw. 



23. Ohaloeiius dimidiuta, , n. sp. 



Testaceous below; above fulvous; antennae black, the last 

 joint pale fulvous; head and thorax impunctate; elytra deeply 

 punctate-striate their posterior half black. 



