42(i 



DE. F. LEUTHNER ON THE ODONTOLABINI. 



This subdivision includes the three genera : — 



I. Neolucanus . 



II. Odontolabis ■ 

 III. Heterochthes, 



Frout tibiffi. 

 normal. 



considerably 

 loneer. 



<S 



A._ 



Head, 

 normal. 



Mandibles. 



with a spine 

 behind the eyes. 



serrated, often forked"! , 



> normal, 

 at the tip. J 



} 



multiform. 



amphiodont. 



(1) Neolucanus, Thorns. 



(fcos, new; Lucanus). 



Neolucanus, Thorns. Ann. Soe. Ent. France (4) ii. p. 415 (1862). 

 Odontolabis, Hope (partim). Cat. Lucan. Col. pp. 5, 31. 

 Anoplocnemus, p., Burm. Handbuch d. Ent. v. p. 357. 

 Anodontolabis , Parry, Trans. Ent. Soc. Lond. (3) i. p. 447 (1863). 



Male. Front of the body (inclusive of the mandibles) scarcely longer than the 

 hinder portion. Head broad, flattened, front margin strongly emarginate. Canthus 

 extending entirely round the eyes. No protuberances on the sides of the head behind 

 the eyes. Mandibles not much longer than the head, serrated on the inside, often 

 vertically forked at the tip, and generally somewhat curved upwards. Prothorax as 

 broad as or broader than the elytra, front edge strongly emarginate on each side, the 

 sides straight, or only slightly curved, the hinder angles pointed. Prosternal process 

 rounded off, not projecting behind, and generally channelled. Legs of uniform length, 

 front tibiae short, dentate on the outside, middle and hind tibiae unarmed. 



Female. Hardly different from that of Odontolabis; mentum generally furnished 

 with a strong crescent-shaped ridge. 



Hope divided his genus Odontolabis into two sections, according to the presence or 

 absence of protuberances behind the eyes ; but he proposed no generic name for his 

 second division. Thomson soon supplied the omission by proposing the very inex- 

 pressive name Neolucanus, which the law of priority compels me to retain, although 

 Parry's name is much more correctly formed, besides expressing the intimate relationship 

 of this genus with Odontolabis (comp. diagram of the species, p. 407). 



Section I. 

 1. Neolucanus laticollis, Thunb. (Plate LXXXIV. figs. 1, 2,cJ; fig. 3, ? .) 



Lucanus laticollis, Thunb. ISIem. Soc. Nat. Mosc. i. p. 163. From Java. 



Neolucanus laticollis, Thorns. Ann. Soc. Ent. France (4) ii. p. 395. 



Lucanus glabratus, Hope (De Haan, MS.). Cat. Lucan. Col. p. 18. (Assam?) 



Male. Pitchy black, shining; head quadrangular, flattened, with a strong semi- 

 circular concavity in front, and the sides nearly straight ; canthus oblique ; mentum 

 sparingly clothed with reddish-brown hair; lower part of the cheeks shining, with 



