16 Descriiitive Catalogue [1897. 



clubs are exactly alike, and they vary in shape from a more or less 

 regularly lenticular, round, oval, oblong, laminiform to cylindrical ; 

 the outer margin is often ampliate, excavate, or grooved, in which 

 case the edges of the hollowed margin are more or less setigerous, 

 and they have also on either the upper declivity, or on both sides, 

 transverse striae, which might perhaps imply that the articulations 

 have become fused together. 



Pew South African Paussus can be said to have a close ally, 

 excepting P. lineatus and P. Afzelii, which are however very 

 distinct ; P. Sdiaumi and P. Germari, which will probably prove to 

 be identical ; and P. cucullatus and P. ruber. If the shape of the 

 maxillary palpi were taken into consideration, the South African 

 species could be divided in eight groups : — 



1. Second joint of maxillary palpi about equal to or a little shorter 

 than the two following, subcylindrical, curving a little outwardly, 

 and tapering slightly from base to apex : P. Humholdti, damarinus, 

 mwms, sinnicoxis,2wopinquus, rusticus, vianicanus, fallax, Bohemani. 



2. Second joint longer than the other two following : P. signati- 

 pennis. 



3. Second joint shorter than the two following; apical joint of 

 maxillse long, and nearly tapering from base to apex : P. cidtratus. 



4. Second joint as long as the other two, but twice as wide ; last 

 joint of maxillary palpi short, elongato-ovate : P. lineatus, Afzelii. 



5. Second joint elongato-quadrate, or curved outwardly from base 

 to middle, and diagonal from there to apex, truncate at tip, where it 

 is broader than the two following : P. cylindricornis , ScJuickardi, 

 Curtisi. 



6. Second joint nearly straight inwardly, much swollen and 

 rounded outwardly, the two joints following small, narrow : P. 

 Klugi, cucidlatus, Burchellianus, ruber, cochlearius , viator, Linnei 

 Burmeisteri, Marshalli. ■■'■ 



7. Second joint broadly inflated, nearly hexagonal, irregularly 

 rounded outwardly and deeply incised at base, inwardly : P. granu- 

 latus. 



8. Second joint broadly quadrate : P. Schauvii, Germari. 

 "Where the second joint is inflated it is slightly convex outwardly 



and concave inwardly. 



To the first group belong all species with a conical spine on the 

 vertex of the head, whether with bipartite prothorax or not. The 

 second contains only one species, as does the third ; but these species 

 are strikingly distinct, as is also the case in groups seven and eight ; 



* In P. Marshalli the second joint is broader and more quadrate inwardly, 

 and the two joints following are longer. 



