76 LUCANID^. 



J. Maii<lil)I('8 iiioijcratcly lung. Sides of the head pro- 

 minentia lohed behind the eyes. 



:;. Mandibles sliort, almost straight externally, not broad 

 at tlie base. Front tibia very slender and strongly curved. 



In spite of its very close relationship with the genus Dorcus, 

 a number of peculiar features seem to justify the retention of 

 a se])arate genus for Onaphalori/x opacw^, but I exclude from 

 it various other species which have been associated with it, 

 most of them belonging to the genus Aegiis. The distinctive 

 shape of the jirothorax, very abru])tly narrowed behind, the 

 great reduction of the ligula and maxillae in both sexes and 

 the extremely slender curved front tibia^ of the female render 

 (J. opacufi a rather isolated form. 



2r). Gnaphaloryx opacus. (Plate XV, figs. 11-13.) 



Gnaphalorijx ojjucvn Bumi., Handl). ICnt. v, 1847, p. 397 ; Arrow, 

 Trans. R. Ent. Soc. Lond. Ixxxiii, 1935, p. 113. 



Gnaphaloryx taurus Voll., Tijds. Ent. viii, 1865, jj. 154, pi. 2, 

 figs. 3 & 4. 



Gnaphaloryx buruieifiteri Nagel, Ent. Mittli. xv, 1926, p. 120. 



Gnaphaloryx tauriifi var. andaiiianiis Kriesche, Arch. f. Nat. 

 Ixxxvi A, 1921, pt. 8, p. 100. 



Black or earthy- brown, clothed with very minute yellowish 

 setae. Elongate and moderately convex, with fairly slender 

 legs. The head smooth and opaque in front and strongly 

 punctured behind. The pronotum strongly and densel}^ 

 punctured, excej^t at the sides, which are rugose, and there is 

 a broad slight depression in the middle, the front margin 

 broad and trisinuate, the front angles produced and obliqueh' 

 truncate, the lateral margins straight to the very strong and 

 sharp lateral angles and strongly excised to the basal angles, 

 which are also sliarj), the base narrow and nearly straight. 

 The scutellum strongly punctured. Tlie elytra oijacjue, very 

 densely and more or less confluently punctured, with the 

 shoulders acute. The metasternum and abdomen opaque at 

 the sides and shining in the middle, distinctly but not closely 

 punctured. 



?. The anterior half of the head is entirely oimque and the 

 posterior ])art rugosely punctured, the dividing line rather 

 sharp. The front angles are obtuse, the jjost-ocular pi-ocesses 

 short. The mandibles are nearly straight, not broad at the 

 base, witli a large blunt internal tooth. The clypeal ])ro('ess is 

 very narrow and jjromiuent. The elytra, less finely scul])tured 

 than those of the male and rather less oj^aque, rugose, usually 

 with faint traces of three or four longitudinal costae on each. 

 The front tibia is very narrow, strongly curved outwards and 

 produced at tlu^ (>nd, with very minute lateral teeth and three 

 a])ical ])rocesses,the two outer ones directed downwards. The 

 middle and hind (ibi;e have each a lateral spine. 



