CALCODES. lie.) 



.shows a transition to the normiil form. Other slight difiVrwuos 

 nieutionod by Boileau ai)p(.'ar to mo to hv individual onh'. Tiu- 

 specimens with darker elytra, to wiiieli Dr. Didier has given 

 the varietal name melas, were found by Doherty at Manipur. 

 The colour may jjerhaps be due to a post-mortem change, but 

 the species has a marked tendency to develope local races. 



I have treated parvus Nagel as synonymous with ca.stanu- 

 pterus, as I can find in tlie description no reast)n for its 

 separation, save the existence in the two type-sju-eimens of 

 certain oval depressions upon the head and thorax and of dark 

 outer margins to the elytra. 1 have found similar depressions 

 in particular s])eeimeiis of tliis and other species, but they are 

 always peculiar to individuals and not specific. It is improb- 

 able that they exist in all the remaining examples said to be 

 in the Oberthiir collection and no doubt unseen by Nagel. The 

 extreme outer margins of the elytra of C. castanoptenis are 

 always dark and are a little widened in certain examples. 

 Herr Nagel remarks that his specimens most resemble C. 

 vicinus Pouill., but atlds that Dr. Didier considered theni to 

 represent a local form of casianopterus. As typical examples 

 of the species are found at Shillong it can scarcely be called 

 a local race. It is described as having, like casianopUru.s, 

 chestnut-red and very glossy elj^tra. Those of C. vicinus arc 

 yellow and not glossy. 



110. Calcodes robustus. (Plate XXI, tig. 4.) 



Seolucanus robuatun Boil., Bull. Soc. Ent. Fr.ince, 11)1^1, p. .'J3. 



fig- 

 Black, not very shinbig, with the el^i-ra bright orange-red, 

 except the extreme margins, which are very narrowly black. 



Oval and not very convex. The head and the front and 

 sides of the pronotum densely coriaceous and opaque. The 

 pronotum feebly punctured upon the dorsal part, its lateral 

 edge gently curved to beyond the middle, where it is bluntly 

 angnlate, and feebly concave to the hind angle, w'hieh is rather 

 sharp. The elytra minutely and unevenly punctured, with 

 the lateral part dull and the outer margins flattened and well 

 rounded. The prosternum rather shar])ly pointed behind. 

 The mandibles short in both sexes and the legs not long. 



$. Rather broadly oval. The head is short and broatl, the 

 canthus bluntly produced outwartl. The mandibles are very 

 broad, strongly curved ext^'mally. The lateral angulati(m of 

 the pronotum is very blunt. The mentum is closely punctur(>d 

 and bare. The ahdouitn is shining and strongly ])unct\nid 

 at the sides and ajjcx. The legs are short and the front tibia 

 very broad. 



