1892.] to the South African Coleopterous Fauna. 101 



humeros sub-amp/iatis, postice parum attenuates, a basi ultra medium 

 in sing id o acute quinque costatis, sutura clcvata inter stitiisque pro- 

 funde alveolatis. 



Long. 35, lat. 7 mm . 



Black, shining, hairless. Head as in all the species of this gen us r 

 broad and deeply impressed on either side ; prothorax very cordiform 

 deeply grooved in the centre with the disk sub-gibbose on each side, 

 li. mited near the posterior margin with a smaller groove, and also 

 with a slight crescent shaped line in front ; elytra depressed and 

 rounded at the shoulders, elongated, and ampliated from the shoulders 

 to the middle, from there very little attenuated towards the apex, 

 suture raised, and each elytron with five acute costae (the sutural one 

 the longest of all) which do not reach further than a little past the 

 middle of the disk, and with the hind part of the wing covers quite 

 smooth, the outer-margin has a duplicate series of punctures and the 

 intervals between the costae are broadly and deeply alveolated. 



This species is very closely allied to P. Fritschii, Chaud., and 

 differs from it by having five costae instead of six on each elytron ; 

 the intervals between the costae are much broader and deeper, and 

 while in P. Fritschii, the costae show, although nearly obsolete, right 

 to the apex, they have disappeared altogether in P. Chaudoiri 1 leav- 

 ing a smooth ami shining space from past the middle to the apex. 

 The only specimen I possess, a female, has no trace — although not 

 defaced — of the fulvous hairs which cover the hind part of the pro- 

 thorax and the scutellum of P. Fritschii. 



Transvaal (Rustenburg), 



P. RTJTATA. 



Elongata, modice convexa, nigra, parum nitida, vitta pubescente sat 

 lata a vertice capitis usque ad medium elytrorum ducta maculaque 

 communi triangula, postica, albida vel pallido-silacea ornata ; elytris 

 utrinque 7-costatis, costis acutis, interstitiis sub-angustis profundeque 

 foveatis. 



Long. 21-24, lat. 7-8j mm . 



Black, somewhat shining with -a white, sometimes pale-yellow r 

 pubescent band beginning at the vertex of the head, covering the 

 centre of the prothorax, the scutellum and the suture to a little short 

 of the middle of the elytra, and a triangular greyish- patch at the 

 apex ; prothorax ovate, elongated — more cordifoim in the female ; 



