88 LUCANID^. 



28. Dorcus curvidens. (Plate VII, tig. 7.) 



Luainvs curvidens Hope,* Trans. Linn. Soc. Loud, xviii, 1841, 



p. 589 ; Hope & Westw., Cat. Luc. Col. 1845, p. 22. 

 Dorca.s dehaani Hope,* Trans. Linn. Soc. Lond. xix, 1845, p. 106. 

 Lucanus dehaani Hope & Westw., Cat. Luc. Col. 1845, p. 22. 

 Dorcus curvidens Boil., Trans. Ent. Soc. Lond. 1913, p. 253. 



Entirely black, rather massive, with stout legs. The eyes 

 are almost divided by the canthus, which does not project 

 laterally. The prosternum broad beliind, scarcely elevated, 

 slightly convex. 



$. Oval, slightly convex. The head is coarsely rugose, with 

 a pair of small tubercles close together in the middle. The 

 mandibles are narrow and bear a small internal tooth above 

 and another beneath. The clypeal process is feebly bilobed. 

 The pronotum is very smooth and shining, with the sides and 

 a narrow basal margin coarsely and rugosely punctured. 

 The sides are rounded, ver}^ gently in front and strongly behind, 

 without lateral or basal angulation. The scutellum is strongly 

 punctured. The elytra have a smooth shining sutural margin, 

 followed by a broad, very strongly punctured interval and a 

 series of narrow shining costse, separated by rugose intervals, 

 the costse becoming gradually feebler towards the sides, 

 which are rugose, as well as the apices. The metasternum is 

 smooth and shining in the middle, coarsely rugose at the sides. 

 The abdomen is finely punctured in the middle and coarsely 

 and rugosely at the sides. The front iihia has fine lateral 

 teeth and three short terminal lobes. 



^. Broad and more or less depressed. The head is short 

 and opaque and bears a tooth on each side just beyond the 

 front margin and near the base of the mandi ble . The mandibles 

 are far apart at the base and the clypeal process is very short 

 and broad, its ftxmt margin very gently curved and the angles 

 feebly produced. There is a very small (juadrate projection 

 on each side behind the eye. The proyiotum is short and 

 broad, with flattened lateral margins, and generally micro- 

 scopically granular and opacjue. The elytra are smootli and 

 shining in large specimens, punctate -striate or broadly sidcate 

 in small ones, but always with the sides rugose and oimque, 

 the lateral margins rounded and the shoulders acutely pointed. 

 The terminal fork of the front tihia is strongly and rather 

 abruptly bent downwards, the middle tibia bears a small 

 lateral spine and the liind tibia lias none. 



Variation of the male. The transformation in the ap])earance 

 which accompanies variation in size is almost complete and 

 the size attained l)y the male is very great compared with 

 that of the female. Small males rather closely resemble 

 females, excejit in the broader and smoother head, with its 

 sharp tootli on eacli side near tlie front margin and the very 



