1 10 LUCANID.E. 



Dorcas glubripennif Westw.,* Trans, lilnt. Soc. Lontl. 1871, p. 359, 



pi. 8, fig. (). 

 Eurytrachelioi prtvcellerus Moll., Insektenborse, xix, 1902, p. 283 ; 



Deutsclie Ent. Zeits. 1903, p. 344. 

 Eitrytrachelus reichei Boil., Trans. Ent. Soc. Lond. 1913, p. 249. 

 var. Euri/trachehifi castelnaudi Deyr., Ann. Hoc. Ent. Belg. ix, 1865, 



p. 31, pi. 2, fig. 3. 

 Eurytraciielus hansteini Albers, Deutsche Ent. Zeits. 1889, p. 235. 

 Eurytrachelus cervuhis Boil., Bull. Soc. Ent. France, 1901, p. 284. 



Black, the male very smooth above when well developed, 

 the female with deeply sulcate elytra. The shoulders of the 

 elytra very acute. The legs fairly short and stout. The 

 prosternum not pointed behind the front coxae but forming a 

 slight rounded protuberance, except in the males of the 

 variety castelnaudi, where it is flat and not at all elevated 

 behind. The middle and hind tibiae have each a sharj) lateral 

 spine. 



?. Elongate -oval, shining above but with the elytra very 

 closely and deejjly sulcate. The head is strongly and closely 

 ])unctured, rugosely in front, with a narrow smooth area 

 behind, and bears two small, not very conspicuous, tubercles 

 placed transversely in the middle. The canthus extends well 

 beyond the middle of the eye but is not prominent. The 

 pronofum is very smooth and shining, with the sides strongly 

 ])unctured, the punctures very dense and rugose externally 

 and extending completely along the basal groove. The front 

 angle is bluntl}^ jjroduced, the lateral margin gently rounded, 

 the lateral and basal angles rounded and imperce])tible. The 

 wuiHlmn bears a few tine })unctures. The elytnt have each 

 about 10 or 12 deep grooves, with narrow shining intervals, 

 tlie grooves confluently and unequally punctured. The grooves 

 become obliterated in the lateral part and the apices, which 

 are densely rugose and opaque. The mentum is coars(^ly 

 rugose. The rneki'^termmi is clo.sely punctured, rugosely at 

 the sides, and the abdomen strongly l)ut less closely. Tlie 

 terminal foi'k of the front tibia is short and broad. 



^. In well-develo])ed males the body is broad and flat, 

 very smooth above, the head very broad and tlie mandibles 

 long, but every stage of transition occurs, in accordance with 

 diminishing size, to small specimens, which sho\v most of the 

 superficial features of the female. 



Variation of the male. In the smallest specimens the heatl 

 and thorax are shining, the head of moderate size, closely 

 and rather strongly ])uncturcd, except in the ])osterior part, 

 the ])ron()tum coarsely and lugosely punctured at the sides 

 and base, usually with scattered punctures along the middle 

 line, the sides evenly rounded, the lateral angle indistinct. 

 The elytra are grooved like those of the female, the grooves 

 wide and deep and the intervals very narrow and sharp. 



