XVII.— On a Collection of Stag-Beetles 

 (Fam. Lucanidae) from Sarawak. By 



P. Nagel, Hamiover, Germany. 



(With one Plate.) 



The late Curator of the Sarawak Miiseiiin, Dr. E. Mjoberg, 

 has been kind enough to send me a collection of stag-beetles, 

 made by him during his recent expeditions to some unknown 

 regions of North Sarawak. It contains besides many extremely 

 rare species not less than nine unknown ones, which are 

 found described below. Also some species collected by Dr. 

 Mjoberg on Mt. Poi and Mt. Penrissen in South Sarawak are 

 included here. 



1.— Hexarthrius Hope. 



H. MANDiBULARis Devr. 



(Ann. Soc. Ent. Fr. (6) I, 1881, p. 237, t. 5, fig. 2.) 

 I have never seen a cf or a 9 of this species and cannot 

 state with certainty that the 9 has been described. But the 

 only specimen in question so completely agrees in colour 

 and other parts with the description of the cf by Deyrolle 

 that I have no doubt in saying that it is the 9 of this beautiful 

 species. The body is more slender than in H. deyrollei ; the 

 colour is a dark chestnut-brown, the underside, the elytra 

 (except the darker suture) and the legs reddi Ji-brown ; the 

 sides and the anterior half of the head are deeply and narrowly 

 punctured ; before the e^'es a flat groove nearly smooth and 

 shining ; ocular canthus broad and as well as the mandibles 

 distinctly punctured; the prothorax is broader than the head, 

 the disc shining, but finelj' punctured, the waved sides and 

 the anterior and posterior margin with the exception of the 

 middle parts strongly punctured ; the anterior angles of 

 prothorax are rounded, the posterior excavated and close to the 



Sar. Mus. Jouin.. Xo. 111. l'.»20. 



