tJORCtlS. 171 



ex('0])t lu'liind the eyes. The front tingles are aeute ami |)ro- 

 ducoil ohlicivu'ly, the front margui is eurvilinearly excised, the 

 upper surface flat, and the sides are a little contracted hehind 

 the eyes. The cly])eal process is short and tiilobed. The 

 pronotutn bears moderately hne scattered j)unc-tin"es, its front 

 angles are bluntly produced, the sides straight to beyond 

 the middle, where they are very bluntly angular, and feebly 

 concave to the hind angles, which are also very blunt. The 

 elytra bear only a few indistinct punctures and are smooth and 

 shining everywhere. The front tibia has two shar}) lateral 

 teeth in addition to the terminal fork, and the middle and hind 

 tibioe are without visible spines. 



Variation of the male. In a small male the mandibles, which 

 curve gently upwards, are about as long as the head, the 

 outer edge is gently rounded and the inner edge serrate from 

 the base to near the tip, with a slightly prominent tooth in the 

 middle. In a large specimen the mandibles are half as long 

 again as the head, the outer edge is nearly straight to near the 

 tip, the inner edge has two small teeth near the base, followed 

 after a short interval by closely-set uneven teeth, the first 

 lai'ger than the rest, to near the tip. The upper surface bears 

 two converging ridges, which unite just before the i\\) to form 

 a strong process ])ointing obli({uely forward. 



t^. Length (with mandibles), 21-25 mm, ; breadth, 7-8 mm, 



$. Length, 18 mm. ; breadth, 8 mm. 



Bhutan : Pankasary Hill. Sikkim : Gnatong (Aug.) ; 

 between Padamtsin and Lingtoo (July). 



Type, in the Paris Museum. 



91. Dorcus platycephalus. (Plate XII, fig. 1.) 



Lucanua pUUyceplmlua Hope,* Proc. Ent. Soc. Lond. 1842, p. 83 ; 



Westw., Cab. of Oriental Ent. 1848, p. 17, pi. 8, fig. 2. 

 L. (siibg. Cydopthahntis) plati/cephalun Hope & Wcstw., Cat. Luc. 



Col. 1845, p. 5. 

 (Jyclarasis platycepliuius Thorns., Ann. Soc. Ent. France (4) ii, 1802, 



p. 397. 

 Prismognathua platycephalus Boil., Trans. Ent. Soc. Lond. l'J13, 



p. 234. 



Black or very dark brownish- black, with a slight metallic 

 lustre upon the elytra, which are very glossy, except at the 

 sides, the head and tlie sides of the pronotum and elytra dull. 

 Small, convex and not very elongate. The eyes ])rominent and 

 scarcely' at all divided by the canthus. The cl\'])eal process 

 short, broad and trilobed. The mandibles widely separated 

 at the base. The shoulders of the elytra ratlier obtusely 

 angulate. The prostemum strongly elevated and com|)resse(i 

 behind and ratlu>r sharply angular. 



