140 LUCANID^. * 



OS. Dorcus humilis. (Plate XII, Hg. 9.) 



Dorcus humilis Arrow, Trans. Ent. Soc. Lond. Ixxxiii, 11(35, p. HI, 

 pi. 6, fig. :i. 



Black, with the fc^inoni j^encrally dark red, llic inner cd^c 

 of tho foiM' posterior tibia' and the under surface of tlie tarsi 

 clothed with close yellow hairs. .Small, rather, narrow and 

 not very convex. The ])ronotum rather broad behind and its 

 sides strongly and evenly roiuidcd there, without trac^e of 

 a lateral angulation or hind angle. The scutelluni bears a few 

 ])uncturcs. The sides of the elytra nearly straight and ))arallel 

 and the shoulders acute. 't'he ])rosternuni ])roininent 

 behind, a little compressed and bluntly jxunted. The entire 

 outer edge of the front til)ia finely serrate^ with three or four 

 slightly lai-gcr teeth in the apical part , and the middle and hind 

 tibia' are faii'ly stout. The seventh joint of the antenna acute 

 and the three club-joints short. 



$. The uj)])er surface is very shining. The head is strongly 

 and (dosely j)unctured, with a slight indefinite elevation on 

 each side. The n^andibles are narrow, a little com))ressed, 

 less strongly curved than those of the male, with an interior 

 tooth at the lower edge and another at the upper edge. The 

 pronotiini is punctured, very linely and not closely in the middle, 

 mor<^ strongly lomid the margins and very closely and rugosely 

 at the sides. IMie ili/trd bear each a juxta-sutural row aiul 

 three double dorsal rows of punctures and the sides and a])ices 

 are closely punctured. The middle and hind tihin' have each 

 a minute lateral spine. 



J'. The head and ])ronotum are opacpic, the former with 

 scattenMl puncttu-es, generally conlined to the sides, the latter 

 with very line punctures in the middle, becoming more nmner- 

 ous and distinct near tlu^ margins and at the sides. The hfad 

 is rathei' broa,d in front, but with the front angles blunt, and 

 there is no trace of })romincuce behind the eyes. Tlu' clypeal 

 |)rocess is transversely rectangular, with the angles blunt. The 

 mandibles are very short, strongly and evenly curved, 

 very sharply pointed, with a strong horizontal tooth above, 

 near the middle of the inner edge, bluntly rounded at the end, 

 unit I'd by a curve<llin(^ with the basal |)art and forming an acutc^ 

 angle with the apical half. The proiioiiitn is much narrower 

 in front than behind and the front angles are pnxhuM'd but 

 blunt. The eli/tra arc V(^ry glossy, the basal margin is rugose, 

 the outer half Ihicly and closely punctured anteriorly and 

 coriaceous behind. There is a single row of punctures adjoining 

 the suture. The nioifurn is shining and rather evenly i)unc- 

 tured. The middle and hind tihiii' have no lateral spine. All 

 the tarsi bear large hairy ])ads beneath all but the last joint. 



i^. Lcntjth (with mandibles), la-IT nun.; (witlK)ut mandi- 

 bles), 13 "5-15 "5 nnn. : bnath, (i mm. 



