104 LUCANID^. 



fine tubercles and forked at the end. The pronotum is also 

 finely and densely granular, entirely opaque at the sides and 

 feebly shining in the middle, the front angle blunt, the lateral 

 edge rounded and rather closely and conspicuously studded 

 with prominent tubercles to the obtuse outer angle and then 

 nearly straight to the hind angle, which is rounded. Tlu; 

 elytra are long, alutaceous and not shining, the lateral margins 

 rather narrowly opaque, the outer edges rather strongly 

 reflexed. The mentum and submentum are densely granular 

 and opaque, the metasternum and abdomen dull and almost 

 unpunctured. The legs are rather slender, the front tibia 

 rather closely toothed externally and strongly forked at the 

 end, the middle tibia strongly and the hind tibia feebly spined 

 in the middle. 



(J. Length (with mandibles), 50-56 mm. ; (without mandibles) 

 35-38 mm. : breadth, 15 mm. 



$. Length, 27 mm. ; breadth. 1 1 mm. 



Assam : Garo Hills, above Tura, 3900 ft. (*S'. Kemp, July). 

 Burma : Thandaung, 5000 ft. [O. C. Olknbach, July). Siam. 

 Indo-China : Laos, Piahat. Federated Malay States : 

 Pahang, Fraser's Hill, Cameron Highlands, 4700 ft. (May, 



Type of boileaiii Did. in the Paris Museum, those oi speciosus 

 Boil, and var. gardneri in the British Museum. The difference 

 between the two latter specimens is not as great as the figures 

 given by Dr. Didier seem to indicate. 



The coloration of the male is very variable. Females 

 have been attracted by light in the Malay Peninsula, where 

 the male has not yet been found. 



41. Dorcus titanus. (Plate VII, figs. 1-4.) 



Lucnnus tit(muf> Boisd., Voy. tie I'Astrolabe, Ent. ii, 1835, p. :237. 



Dorcus titan Burm., Handb. Ent. v, 1847, p. 384. 



Platyprosopus platymelus Saiind.,* Trans. Ent. Soc. 1854, p. 50, 



pi. 3, fig. 7. 

 Dorcus niarginalis Saund., op. cit. p. 53, pi. 4, fig. 6. 

 Dorcus obscnrus Saund., op. cit. p. 52, pi. 4, fig. 7. 

 Dorcus westermanni Hope,* Trans. Linn. Soe. xix, 1843, p. 106. 

 Dorcus titanus Arrow, Trans. R. Ent. Soc. Lond. Ixxxvi, 1937, p. 244. 



Entirely black, smooth and sliining above in the $, dull 

 ((^\cej)t in small examples) in the male. The canthus reaches 

 far beyond the middle of the eye and almost divides it. Tiie 

 prosternum is scarcely elevated behind the coxa?, and not 

 produced. 



$. Elongate-oval, not very convex, tlie legs fairly stout. 

 The head is rather coarsel}^ closely and evenly rugose, slightly 

 convex in the middle, where there is a pair of rather inc-on- 

 spicuous tubercles placed transverse!}'. The heatl is broad but 

 the lateral angulation is feeble. The clypeal procet^s is rounded 



