20 



None of the interstices raised 6. 



6. Each elytron with lour well-defined, 



paired rows of punctures, the punctures 

 in each row closely plac d and regularly 

 arranged and the interstices (seen under 

 a high power) very fin ly punctate; 



body oblong-, parallel-sided 7. 



No such combination of characters .... 8. [p. 27, 



7. Ely tral punctures strongly impiessed . . Ch. maniparensis, sp. n., 

 Elytral punctures feebly impressed .... Ch. dohertyi, sp. n., p. 27. 



8. Each elytron more sparsely punctate, the 



punctures arranged in paired rows 

 (though usually incompletely so) and 

 not closely placed in each row; inter- 

 stices impunctate ... 9. 



Each elytron closely and thickly punctate, 

 interstices punctate , 14. 



9. Pronotuin impunctate (or with at most 



one or two scattered punctures-) 10. 



Pronotum punctate 11. 



10. Prothorax black, elytra dark brown or 



rufous ; body convex, short with apical fp. 28. 



end of elytra not tapering; Ch. templetom, Paly, 



Body oblong-elongate, convex, tapering 

 towards apex ot elytra Ch. krisfaw, Paly, p. 29. 



11. Apical segment of maxillary palp conical, 



less stout than the preceding segment ; 

 el) tral punctures deeply impressed, 



more regular in arrangement Ch. ceylonica, sp. n. 7 p. SO. 



Apical segment of maxillary palp trun- 

 cate, not conical, stouter and larger 

 than, or at least equal to, the preceding- 

 segment 12. 



12. Prothorax almost quadrate, only slightly 



broader than long; colour dark greenish 

 or purplish, elytra cupreous, antennas 



and tarsi black Ch. anilretvesi, Jac, p. 31. 



Prothorax transverse," much broader than 

 long; colours different 13. 



13. Insect apterous, colour brown with 



brassy sheen . Ch.fulvocenea, Jac, p. 31 . 



Insect winged, with brassy sheen, but 

 not brown Ch. madrascc, Jac, p. 32. 



14. Insect with brilliant metallic colours and 



with a longitudinal purple or steel-blue 



stripe on each elytron , 21. 



Insect with no such colouring, or at least 

 without the stripes 15. 



15. Pronotum (seen from above) having at 



each side a deep longitudinal channel 

 bordered by a prominently raised strip, 

 audits surface uniformly punctate with 



small punctures throughout Ch. ccelesffna, Palv, p. 33. 



Insect with no such combination of char- 

 acters 1G. 



HL Insect large, length 10-11 mm., breadth 

 6-7 mm. ; black with aeneous sheen on 



