104 Rev. F. W. Hope on some rare and 



purchase, and have been forwarded to me for the purpose of describing- the 

 novelties; and I may venture to assert, without fear of contradiction, that, 

 when examined, they will be considered a very valuable addition to our 

 acquaintance with oriental entomology. Before entering on the specific de- 

 scriptions I have one other remark to make. The present collection of in- 

 sects from Silhet, as well as others from other parts of India, are frequently 

 greatly damaged by the substances used with the intention of preserving 

 them ; the collectors, not content with using abundance of arsenical soap, 

 apply also to the insects a varnish (derived probably from the resin called 

 anime), which is apparently painted over them, and to this is sometimes added 

 turpentine, as well as other ingredients of a resinous nature, with which I am 

 unacquainted. Now if spirits of wine are used to clean these insects, a white 

 scurf spreads over the whole surface, and this is too often increased by a re- 

 newed application of spirit. The only means used at present have been warm 

 water and brushing them well with a camel's hair brush. I am told, however, 

 that a solution of caoutchouc is more efficacious than anything else in resto- 

 ring the insects to their original brightness. It ought, however, to be repeated 

 till the insects are thoroughly cleared of the arsenic and other ingredients, 

 used with the intention of preserving them, but which certainly have often a 

 contrary effect, as many insects, which externally appear sound, are internally 

 entirely rotten and soon fall to pieces. For this reason the oriental collections 

 offered for sale in this country are frequently scarcely worth purchasing. 



LUCANID^E. 



Hexarthrius, Burmeister. 

 Sp. 1. Hex. Parryi. Tab. X. fig. 2. 



Niger, mandibulis exsertis subdenticulatis bidentatis, capite thoraceque sca- 

 briusculis, elytris postice castaneis. 



Long. lin. 36; lat. lin. 10. 



Statura Luc. Rhinocerotis, Fab., at latior. Antenrue articulis quinque ultimis fusco-pubescen- 

 tibus, sexto nigro valde acuto. Mandibular arcuate, capite longiores, intus crenata*, 

 bidentatae. Caput utrinque unidentatum, disci medio fortiter impresso. Thorax an- 



