DOROUS. 113 



angle, which is situated far hack, and gently curved to the 

 base. The dytrd are shining and finely punctured, the shoulders 

 sharply angular and the sides rounded. Tlie nientuni is very 

 broad and oj)a(iue. The proMernum is broad. Hat, truncate 

 behind and not at all elevated. 



Variation of the. male. In small specimens the head and 

 pronotum are shining and bear very fine scattered jnuictures, 

 and the elytra, as in the female, are deeply striate, the inner 

 intervals broad, minutely punctured and very shining, the 

 outer j)art linely rugose and dull, with very narrow intervals. 

 The mandibles are short and sharp, evenly curved and armed 

 internally close to the base with a strong blunt process set at 

 right angles. With iiu-reased size the elytral grooves disappear, 

 as well as the punctures of head and thorax, which become 

 (juite dull. In full-sized males the elytra are smootli and 

 shining, with minute punctures, the outer margins slightly 

 dull but not more closely punctured. The head is very broad, 

 the mandibles are about twice the length of the head, almost 

 straight in the basal ])art, the basal process flat and two-cusped, 

 with a miiuite ante-a])i(al tooth internally. The excision of 

 tlie lateral margin of the prothorax is well marked. 



o. //P/?(7</< (with mandibles), 3,'}-()2 mm.; (without mandibles) 

 29-46 mm. : breadth, 14-22 mm. 



$. Length, 28 nim. ; breadth, 12 mm. 



Burma : Ruby Mines (IF. Doherty). 



Type in the Paris Museum, co-types in the Rene Obertlnir 

 collection. 



40. Dorcus sewertzowi. 



Dorcas sewertzoiri Scin., HoraR Sop. Ent. Ro.ss. xxv, 1891, p. 301). 

 Dorcus rugatus Did., Bvill Soc. Ent. France, 1927, p. 193. 



Black and moderately shining, with the tarsi and the sides 

 of the metasternum clothed, the latter rather thinly, with 

 yellow hair. Compact and convex, ])arallel-sided, cylindrical 

 l)ut not long, the legs and antenna* rather short. The i)osteiior 

 median part of the liead is smooth and shining, the ocular 

 canthus verj' slightly developed but extending past the 

 midtlle of the eye. The pronotum very shining, rather finely 

 and si)arsely punctured in the median part and strongly and 

 densely at the sides, the front angles rather blunt, the sides 

 almost straight to the sharp lateral angles and then sinuate to 

 the strongly marked hind angles. The base is almost straight. 

 The scutellum bears a few punctures. The elytra closeh' and 

 confluently punctured, with rather ill-deflned dorsal stria?, 

 which disajjpear ujxm the sides and posterior part. The 

 siioulders sliarp-angled. The metasternum very smooth and 

 sliining in the middle, with very miimte scattered ])unctures, 

 and the sides rugose. The abdomen rather closely punctured 



I 



