176 LucANiD-a:. 



6 (5) Pronotum very coarsely rugose roapstorffi Wat., p. 178. 



7 (2) Head smooth parallelus Hope, p. 1 79. 



8 (1) Elytra more or less shining, not very 



closely sculptured. 



9 (10) Head rugose labilis Westw., p. 180. 



10 (9) Head distinctly punctured linealis Did., p. 1 82. 



The $ of Mgus e.schscholtzi Hope is unknown. 

 9.3. ^gus chelifer. 



^gtischelifer Mac].,* KoTasEntom. 1819, p. 113. 

 Mgusnitidus Boil.,* Bull. Soc. Ent. France, 1899, p. 321. 



Black, smooth and shining in large males or with the head 

 and })ronotum dull, closely sculptured and dull in females and 

 small males, with a clothing of minute erect settle and sometimes 

 witli a coverhig of grey adherent earthj" matter in the females. 

 The legs clothed with j^hort pale hairs, the middle and hind 

 tibia? bearing two or three small lateral spines. The body a 

 little depressed and the base of the pronotum straight and 

 distinctly narrower than the elytra. 



$. Oval in shape, with the upj^er surface closely sculptured 

 and dull. The head is very strongly and closely punctured. 

 The mandible has a strong tnmcate tooth near the middle and 

 the clypeal process is rather broad and emarginate. The 

 'pronotum is strongly and closely punctured, with the sides 

 broadly rugose. The front angles are bluntly produced, the 

 sides evenly rounded and the hind angles obtuse. The elytra 

 are finely striate, with the intervals flat and finely and closely 

 longitudinally rugose. The shoulders are sharp and the sides 

 rounded. The mentum is very coarsely rugosely punctured. 

 The lower surface of the body is shining but strongly punctm-ed, 

 the last sternite very coarsely and closely. 



^. The body is dei)ressed ; the head is more or less hollowed 

 in front, with the hinder edge of the hollow a little produced, 

 excx^pt in very small specimens. The clypeal jirocess is bilobed. 

 The sides of the head, except in very small specimens, are 

 prominent behind the eves. The sides of the pronation' are 

 rather straiglit and parallel, with the front angles truncate or 

 bluntly jn-oduced, the hind angles obtuse but distinct and the 

 t)as(^ nearl}^ straight. Tlie elytra are finely but rather deejily 

 striate, except at the sides, where they are finely and closely 

 punctured, the shoulders are sharply angulate and the sides 

 rouiuled and a little flattened. The loiver .surface is very 

 sliining but well punctured, tlie last sternite finely and closely 

 ])nn(tured and setose. 



Variation of the tnale. Small males, like the females, are 

 closely punctured above and not shining. The head and 

 ])ronotum are coarsely punctured, rugosely at the sides, and 

 the elytra finely and closely. The head is not very broad and 



