364 STAPHYLINID^. [Blcdius. 



raised impunctate spaces scattered over 



disc B. SPECTABILIS, Kr, 



b. Tborax more closely and. evenly punctured, 

 with impunctate spaces wanting or present 



only near central line B. TEICOBNIS, Herhst. 



B. Head with eyes as broad as thorax ; size small ; 

 colour usually unicolorous black, elytra rarely 



pitchy or even testaceous B. UNIC0BNI3, Germ. 



ii. Thorax not armed with a horn in male. 



1. Head produced into a short but more or less distinct 



horn-like prominence on each side B. bicohnis, Germ. 



(liuddii, Steph.). 



2. Head without horns or horn-like prominences. 



A. Antenna? rather slender with an abrupt three- 



jointed club ; elytra very light yellowish testa- 

 ceous (almost whitish in life), with scutellary 

 region more or less broadly black B. AEENAEITJS, Payk. 



B. Antenna? with a more or less gradual and elon- 



gate club, 



a. Posterior angles of thorax viewed from above 



well marked, and projecting in a minute 

 tooth. 

 a*. Elytra black or pitchy black ; antenna? 

 dark with base reddish testaceous ; punc- 

 tuation of thorax fine. 

 a+. Elytra not more than one and a half times 

 as long as thorax ; mandibles stout ; 

 labrum entire or feebly sinuate. 

 a J. Legs lighter ; antenna? more slender . B. pallipes, Grav. 

 bj. Legs darker ; antenuEB stouter, much 



thickened towards apex B. fuscipes, Eife. 



bf. Elytra nearly twice as long as thorax ; 



mandibles slender ; labrum more or less 



bilobed B. subteeeanetts, Er. 



b*. Elytra reddish testaceous j antenna entirely 



red ; punctuation of thorax strong . . . B. LONGXJLUS, Er. 



b. Posterior angles of thorax viewed from above 



blunt or quite rounded, 

 a*. Thorax rather strongly and thickly punc- 

 tured, 

 af. Antennse dark with base red ; forehead 

 distinctly punctured ; elytra usually red, 



sometimes dark B. FBACTICOENIS, Pai/h. 



bf. Antennae entirely dark ; forehead almost 

 impunctate ; elytra chestnut brown, dark 



brown, or blackish B. FEMOEALIS, G^U. 



b*. Thorax shallowly and sparingly punctured. 



af. Thorax evidently transverse; form longer 



and broader ; elytra rather deeply punc- 



tured B. OPACUS, Block. 



bf. Thorax scarcely transverse (often red- 

 dish) ; form shorter and narrower; elytra 



very finely punctured B. ateicapillus. Germ. 



II. Thorax without central furrow, but with a smooth and 

 usually somewhat rait^cd longitudinal dorsal line. 

 i. Thorax strongly punctured with posterior angles 

 obtusely rounded. 



