LUC ANUS. 47 



in front and at the sides. The lateral margins are acutely 

 angulate behind the middle, gently rounded from there to the 

 front angles and feebly concave to the hind angles, which are 

 well marked but not acute. The scutdlum is finely and 

 closely punctured. The elytra are finely and closely punctured 

 but not opaque at tlie sides, shining dorsally, \\here they are 

 very lightly and minutely punctured. The front tibia is 

 produced at the end and not very deeply bifurcated. 



cJ. The head is finely and densely granular and opaque, and 

 surrounded by a ridge, which is straiglit in front and broadly 

 interru})ted behind. There is a long chijeal j^rocess, dilated- 

 and forked at the end. The anterior angles of the Ixead are 

 rather sharp and prominent. The jjronoiion is finely coriaceous 

 and sliining, with the sides densely punctured and opaque. 

 The lateral margins are strongly angulate in the middle, the 

 front angles are sharply ^jroduced and the liind angles rather 

 blunt. The scutellum is closely punctured. The elytra are 

 moderately shining, finelj' and closely but not deeply 

 punctured, and there are two or tliree lightly indicated 

 longitudinal costa^. The front tibia is very slender, with the 

 tip jnoduced and strongly bifurcated, and a sharj) spine near 

 the base of tlie tarsus beneatli. The long mandibles are a little 

 expanded internally at the base by a feebly serrate ridge and 

 beyond it are bent uj) wards and do\\an^ards. The}' bear a 

 moderately long oblique tooth beyond the middle and are 

 forked at the end. The inner edge before and after the tooth 

 bears a number of fine but conspicuous tubercles. 



Variation of the male. I have seen only well-developed male 

 speciniens. In the largest the mandibles are more strongly 

 curved downwards than in those of moderate size, and the 

 clypeal process is thickened at the end and its tips less 

 divergent. 



^. Length {with mandibles), 54-70 mm.: (without mandibles) 

 39-49 mm. : brnidfh, 17-21 mm. 



$. Length, 31-37 mm. ; breadth, 13-5-15 mm. 



SiKKiM : Lachen Lachung, August (Oberthiir collection). 

 Yunnan. Szechuen : Ouy-8v (i?. P. Mombelg). 



Type (from Yunnan) in the Britisli Museum. 



The species described above is that described and figured by 

 Planet in 1903 as Lucanus singularis. L. singular is was 

 originally described by him in 1900 (Le Naturaliste, xxii, 

 p. 1 1 ) from a single female specimen which in my opinion is 

 specifically difierent. The type, as described and figured, is 

 singular in its narrow, parallel-sided form and smooth glossy 

 surface. The female of the species described and figured 

 three years later is not remarkable in these respects. As 

 Planet's excellent figure shows, it scarcely differs from the 

 female of L. lunijer except in the very acute lateral angles of 



