454 



PAUSSIDvE. 



Table of the Genera. 



Second joint of the labial palpi always 

 longer than broad, much longer than 

 the preceding ; maxillary palpi five- 

 jointed. 



i. Antennas six-jointed, the last five joints 

 more or less soldered together and 

 forming a club. 



1. Third joint of the maxillary palpi 



very large, but not widened at 

 apex or compressed, subcylindrical 



2. Third joint of the maxillary palpi 



very large, much widened at apex, 



and compressed 



ii. Antennas two-jointed, the second 

 joint forming a very distinct club. 



1. Pronotum with the anterior portion 



or lobe twice as broad as the 

 posterior and divided from it by 

 a feeble furrow ; club of antennas 

 irregular, strongly bidentate on 

 its external margin 



2. Pronotum not divided, with at most 



very feeble traces of a depressed 

 transverse line in the middle. 



A. Pronotum more or less cordiform, 



varying in relative length and 

 breadth; club of antennas round, 

 lens-shaped, or oblong with the 

 apex rounded and the base 

 truncate , 



B. Pronotum very short, or short, 



transverse-oval 



II. First two joints of the labial palpi 

 always very small and about equal ; 

 maxillary palpi four-jointed ; anteraias 

 two-jointed, the second forming a very 

 variable club 



Cerato debus, Westw., 



[p. 454.. 



Me RiSMODERtrs, Westw., 

 [p. 457. 



Euplatyrhopalus, Desn., 

 [p. 465. 



Platybhopalus, Westw., 

 [p. 458. 



Platybhopalopsis, Desn., 

 [p. 467. 



Paussus, L., p. 469. 



Genus CERATODERUS. 



Ceratoderus, Westwood, Proc. Linn. Soc. Lond. xviii, 1842, p. 51 ; 

 id., Arcan. Ent. ii, 1848, p. 37 ; Eaffray, JSouv. Arch. Mus. Paris, 

 (2) viii, 1885, p. 840. 



Form rather slender and elongate ; head large, produced before 

 the eyes, which are small and not prominent, temples widely dis- 

 played behind the eyes ; antennas large, the first joint subquadrate, 

 the rest soldered together and forming a broad fiat club, 2-5 very 

 transverse, of almost equal length, last joint longer, rounded at 

 the apex ; mandibles hooked and sharp, maxillae with only one 

 lobe, short, curved, aud strongly bidentate at the apex ; maxillary 

 palpi large, but not much compressed, 5-jointed, with the third 

 joint much the largest, somewhat ovate and thickened, and the 



