76 Major F. J. Sidney Parry on 



tharolethrns, Tjeptin(ypterus, and Macrocratesj these, alto- 

 gether, amount to about a quarter of the entire Lucanoid 

 Coleoptera, and I propose to raise them into a distinct 

 family ClaJognathvlce, differing as they do in so many 

 respects from the Lucanidce and Odontolabidce. 



The family may be characterized as follows : — 



Clava of antennee tri-articulate, leaflets moderately pro- 

 duced. 



Clypeus ^mall, indistinct. 



Eyes never entirely divided by a canthus. * 



Anterior tibice in the males straight; armature of the 

 four posterior tibia3 variable in the males, unidentate in 

 the females (with the exception of two species, Frosopo- 

 coilus cavtfrous and P. approximatus) . 



The species in comparison with the Lucanidce and 

 Odontolabidce are of moderate size, and variable in colour. 



The numerous species contained in the old genus Cla- 

 dognathus, I now propose to group in the following 

 genera : — 



1. Cladoijnathus, Burm. ; now limited to three species 

 only. 



2. Psalidorentus, Mots, (substituted by the author for 

 PsalidognatJtus, see Etudes Entom. 18G2) ; only two 

 species from Japan are at present known, assimilating 

 in general form to many of the species of Mctopodontio^, 

 differing, however, in their mandibles being considerably 

 more deflexed, in the total absence of tubercles on the 

 head, with a flat process (lamina) between the mandibles, 

 and immediately above the clypeus, and finally in their 

 colour, which is of a rich dark chesnut. 



3. Mctopodontas, Hope; insects exhibiting great di- 

 versity of form and sculpture in the various stages of 

 development ; the upper surface of the head in the var. 

 max. is invariably tuberculate, but in the var. minor this 

 latter character is most inconstant ; the species compos- 

 ing this genus are unicolorous and bicolorous. 



4. Prosopocoihis, Hope; by far the greater number 

 of the species composing the family are contained in this 

 genus, and will, I have no doubt, hereafter be subjected 

 to further subdivision ; for the present, I must con- 



* An exception occuib iu two species, Prosajpocoilus Archeri and Pro- 

 sopocoilus forceps. 



