398 CLAVICORNIA — SILPHIDAE. 



II. Antennae with eleven joints. 



Antennae gradually thickened or with three or four 

 larger joints at a])ex. Last joint of maxillary palpi oval 

 or cylindrical. Thorax usually broadest at base and elytra 

 generally rounded at apex. Siljjha, Lin. 



jB. First joint of antennae elongate. 



Antennae with distinct three-jointed club. Ligula emar- 

 ginate. Thorax broadest at base, sides bordered ; elytra 

 with rows of punctures, nearly covering abdomen but 

 truncate at apex. Sphaerites, Duft. 



Colon. 



A. Anterior tibiae and tarsi simple in both sexes. 



a. Elytra with distinct regular striae ; posterior femora 

 of male not notched beneath. 



Oblong-oval. Yellow-brown, with fine yellow pubes- 

 cence ; antennae (including club) yellow - red ; legs 

 brownish-red. Thorax nearly as long as broad, posterior 

 angles blunted. Posterior legs of male with femora Ijroad, 

 dilated in front, with a blunt tooth before apex ; their tibiae 

 somewhat bent, finely notched on under-side ; those of 

 female simple. L. If 1. Rare. C. vicnnensc, Herbst. 



h. Elytra with at most traces of dorsal striae ; posterior 

 femora of male finely notched beneath. 



I. Thorax strongly and closely punctured. 



Oblong-oval. Black-brown, puljescence brownish-yellow\ 

 Thorax large, broadest behind middle, posterior angles 

 obtuse ; elytra closely and rather finely punctured, with a 

 deep sutural stria and traces of dorsal striae. Posterior 

 legs of male with a strong tooth (somewhat curved and 

 notched beneath) behind middle of femora, their tibiae 

 finely notched beneath ; those of female simple. L. 1 — 

 1| 1. Ptare. C. 2)uncticolle,\\.v. 



II. Thorax moderately finely punctured. 



Oblong-oval. Black-brown ; puljescence golden-yellow ; 

 antennae red-brown, club black-brown ; legs red-brown. 

 Thorax broadest before base, rather strongly narrowed in 

 front, posterior angles bluntly rounded ; elytra extremely 

 finely and closely punctured, with only a sutural and a 

 luteiul stria. Posterior legs of male with a little tooth 



