Monograph on the Cebrionidce, by Dr. Leach. 41 



Descr. — Thorax, back, and elytra punctated, and covered with 

 black down ; the down long : the antenna? above covered with 

 fuscous-brown, and beneath with ferrugineous down ; the epigas- 

 trium, breast and thighs covered with brown-rusty down j elytra 

 with elevated lines ; the intermediate grooves moderate. 



GENUS IV.— TIBESIA. 



Antennas articulis 2 et 3 longitudine aequalibus, latitudinem longi- 

 tudine aequante, ultimo apicem versus incrassato, abrupte 

 acuminato. 



Palpi maxillares, capite breviores, articulis 2 et 3 aequalibus ; 

 quarto praecedente paulo longiore, apicem versus gradatim 

 crassiore, apice obsoletissime oblique subtruncato rotundato. 



labiates, articulo ultimo gradatim clavato. 



Thorax transversus, antice rotundatus ; sternum anticum con- 

 cavum, margine dilatata ; tarsi crassi et breves. 



Antenna?^ with their second and third joint equal in length, not 

 broader than long, the last joint towards its extremity thick- 

 ened and abruptly sharpened. 



Maxillary palpi shorter than the head, the second and third 

 equal ; fourth a little longer than the preceding one, towards 

 its apex gradually thicker, the apex very obsoletely and 

 obliquely somewhat truncated, and rounded. 



Labial palpi, with their last joint clavated. 



Thorax transverse anteriorly rounded ; anterior sternum concave 

 with its margin dilated ; tarsi thick and short. 

 Sppcies 1. — Ruficollis. 



T. — Castaneo-ferruginea, capite nigro, elytris subcastaneo-testa- 

 ceis, antennis castaneo-fuscis. 



Cebrio ruficollis. Fabr. Syst. Eleut. 



JLoug. corp. 6 i millim : 



Habitat in Barbaria. 



Mus. Latreille. 



Descr. — Antenna? articulis tribus basilaribus, labio, maxillis, 



palpisque ferrug'meo-testaceis ; mandibular rufo-ferrugineae. Caput 



forte punctatum. Thorax punctatus, elytra laevius punctata, ob- 

 solete striata. 



