372 



Dr. Malcolm Cameron on 



chinensis Boh. 



(26rt) terminalU Cam, 



sfaphylinoides Kr. 



Prothoracic epimera present. Labium 



more or less emarginate anteriorly in 



the middle, with the angles often 



dentiform. 

 Prothoracic epimera wanting. Labrum 



with a strong tooth in the middle of 



the emargination which projects a 



little beyond the anterior border (Sub- 

 gen. Charichirvs). 

 Antennae entirely reddish-testaceous ; 



legs testaceous; posterior part of the 



elytra more or less broadly and dis- 

 tinctly rufo-testaceous 

 Antennae black, the last 3 or 4 joints 



reddish-testaceous ; legs pitchy ; 



posterior part of the elytra obscurely 



dull reddish .... 



Mandibles 4-dentate (Sub-gen. Isocheilus). 



Species larger (7 mm.), blackish, elytra 



obscure testaceous, more or less ex- 

 tensively infuscate on the disc . 

 Mandibles with the right 4-dentate, the 



left 3-dentate (Sub-gen. Arlhocharis). 



Species smaller. 

 Head and thorax with distinct smooth 



median line; species brighter and 



more shining; abdomen much less 



thickly punctured and pubescent 

 Head and thorax without median smooth 



shining line ; species of duller colour, 



less shining; abdomen much more 



thickly punctured and pubescent 

 Gular sutures fused or very narrowly 



separated (Sub-gen. Medon s.str.). 

 Gular sutures not fused, widely separated. 

 Elytra shining testaceous, the base 



broadly infuscate; head and thorax 



bright reddish-testaceous, shining 

 Elytra otherwise coloured. 

 Antennae slender, the 5th joint dis- 

 tinctly longer than broad; species 



smaller (3 mm.) ; vertex of head simply 



punctured, a little shining; elytra 



reddish, largely infuscate posteriorly . (22a) orientalis Cam 



ochracea Grav. 



uvida Kr. 



(23) rubiatndus Cam. 



8. 



