182 [August, 



One male and seven females, tlie male having a very large rounded 

 fovea on the fifth ventral segment and the head broader than in the 

 female. Distinguishable from the other Indian forms v^dth mandibles 

 bidentate within b}' the densely, coarsely, rugosely punctured head, pro- 

 thorax and elytra, and the relatively narrow head. C. rosti Schub., 

 kindly determined for me by Dr. Cameron, the commonest species of the 

 genus in Almora, a larger insect, has a broad, j)Osteriorly-widened 

 coarsel}^ sparsely punctured head, a sparsely punctured prothorax, with 

 smooth median space, the mandibles tridentate within, etc. C.Jluviatile 

 is more nearly related to C. tiiarqinaium Motsch. { = Jiinhatum Kr.) and 

 C. ahdomiiiale Motsch., and is separable therefrom by the coarser 

 sculpture of the ujiper surface. Another allied insect, with a sharply 

 defined testaceous apical margin to the elytra and the mandibles triden- 

 tate within, has been sent from Almora; but as a single example only 

 has been found, it must remain undetermined for the present. 



DiAxous Samouelle. 



Since the publication of my papers on the Indian species of this 

 genus (Ent. Mo, Mag. Iv, pp. 41-55, 97-101, 1919), some hundreds of 

 additional specimens have come to hand from my son H. (1. C, and a 

 certain number have been found in an extensive unmounted collection of 

 Hikkim beetles received b}^ the British Museum from Mr. H. Stevens, 

 Four novelties have been discovered, including two remarkably distinct 

 forms, which are described below. The additional localities, etc., for 

 certain other species require mention : — 



D. annandalei Bernh. — About 100 examples from Kanikhet, Jag- 

 thana, Khaula, Sunderdhunga, and W. Almora, and one from Gopaldhara 

 (^Steveiis\ are now before me, these showing considerable variation in the 

 sculpture of the prothorax. The sole difference, therefore, between this 

 insect and D. versicolor Cam. (two specimens only of which are known, 

 including the type) is the simple fourth tarsal joint. D. annandalei is 

 one of eight species found at Jagthana. 



D. iuaequalis Champ. — Found subsequently at Chakrata, Ilanikhet, 

 and Jagthana, a long series in all. 



D. scahricollis Champ. — Subsequently found in profusion in Jag- 

 thana, W. Almora. 



D. cyano(j aster Champ. — Also sent in profusion from Almora. It 

 has been taken in the Kungbong Valley, Sikkim, by Mr. Stevens. 



D. lohigerus Champ. — Found in great abundance by my son at 

 Tanakpur, and sparingly in the Kungbong ^'alley by Mr. Stevens. 



