390 Descrijrtive Catalogue [1898. 



E 2 . Prothorax with a longitudinal sulcus more or less obsolete 

 and sometimes reduced to an oblong fovea on the anterior 

 part of the base. 



F 2 . Head without any transverse sulcus on the frontal part. 



G 2 . Prothorax transversely ovate, not cordiform laticollis. 



G 1 . Prothorax cordiform, at least as long as broad. 



H 2 . Longitudinal sulcus deep and well denned, head and pro- 

 thorax punctate rugosula. 



H 1 . Longitudinal sulcus more or less interrupted or obsolete ; 

 head and prothorax not punctate. 



1 2 . Broad ; antennae with intermediate joints slightly transverse, 



ninth and tenth nearly quadrate ; prothorax ampliated on 

 the sides ; elytra slightly longer than wide ; ferruginous or 

 testaceous majorina. 



P More slender ; antennae with the intermediate joints and also 

 the ninth and tenth very transverse ; prothorax longer, not 

 ampliated on the sides ; elytra longer than broad ; colour 

 generally dark, feet rufous bicolor. 



F 1 . Head with a deep transverse sulcus on the frontal part, 

 dividing in two the tubercles bearing the antennae ; 

 longitudinal sulcus of the prothorax faint, disappearing 

 in front montana. 



E 1 . Prothorax without any trace of a longitudinal sulcus, the 

 ante-basal fovea round or absent. 



F 2 . Head without any transverse sulcus on the frontal part. 



G 2 . Broad and convex ; prothorax slightly cordate, broader than 



long ; elytra not much longer than wide natalensis. 



G 1 . Narrow, depressed ; prothorax much cordate, longer than 

 broad ; elytra much longer than broad. 



H 2 . Larger ; head scarcely narrowed in front, sulci deep and very 

 oblique ; prothorax sinuose on the sides close to the trans- 

 verse sulcus pilosella. 



H 1 . Smaller ; head strongly narrowed in front, sulci fine, little 

 arcuated and less distant from each other ; prothorax 

 regularly cordate without sinuosity on the sides . . . . abdominalis. 



F 1 . Head with a more or less deep transverse sulcus on the 

 frontal part, dividing in two the tubercles bearing the 

 antennae. 



G 2 . Head longer than broad, more or less attenuate in front. 



H 2 . Ferruginous or rufous ; antennae compact and rather short ; 

 joints third to tenth transverse. 

 The three following species are closely allied to each other. It 



may be found difficult to identify the females, but the males have 



the following striking characters : — 



1 3 . Head attenuate in front, sides decidedly oblique ; prothorax 



more rounded on the sides and in front, more deeply sinuate 

 behind the middle ; male ; intermediate trochanters with 

 a basal tooth, posterior ones simple ; last ventral segment 

 with a large, oval, longitudinal and deep depression . . . . cajjensis. 

 P. Head little attenuate in front, sides very little oblique ; pro- 

 thorax less rounded on the sides, attenuate in front, and 

 less deeply sinuate behind the middle ; male ; intermediate 



