952 MR. G. A. K. MARSHALL ON [Dec. 11, 



narrowed to near apex where there is a broad constriction, base 

 slightly rounded, apex broadly produced above the head ; upper 

 surface convex with four sharp discal prominences on the anterior 

 part, the finer sculpturing being entirely hidden by very dense 

 scaling ; the entire underparts and sides, up to, and including, 

 the outer half of the discal prominences, pure white ; the central 

 portion light brown, leaving a mere trace of a central carina in 

 the middle and having a large T-shaped white marking on the 

 basal half. Elytra oblong, jointlj^ sinuate at base, much broader 

 than prothorax at shouldei'S, which are sharply and obliquely 

 prominent, sides straight and parallel to far beyond middle, 

 apices separately produced into very short but sharp processes ; 

 upper surface convex, gibbous, deepest at shoulders and rapidly 

 declivous posteriorly, with regular rows of deep foveolse, the 

 intervals somewhat uneven and with low i-ounded tubercles, 

 the most prominent on each elytron being : a short curved basal 

 row of three, a longer very oblique median row of three, a 

 juxta-sutural tubercle on the summit of the declivity and a larger 

 discal one on the declivity ; the sculpturing is, however, largely 

 hidden by dense snow-white scaling which covers the whole 

 surface except the extreme apex, which is light brown, and a 

 small quadrate dark bi-own patch round the scutellum, which is 

 itself covered with light brown scales. Legs covered with 

 whitish-brown scales and short dejaressed white setae, the femora 

 with a white band not far from apex. 



Orange River Colony : Bothaville {Dr. H. Brauns). Mata- 

 BELELAND : Plumtree {Father O'Heil). 



Type in the British Museum. 



Its remarkable white coloration, the absence of fascicles on the 

 elytra, and the thinner and less coarsely punctured rostrum will 

 at once distinguish this insect from P. affaber Boh., hitherto 

 the only other described South- African species. 



Pachyonyx triangularis, sp. nov. (Plate LXVII. fig. 8.) 



Long. 5|-6, lat. 2|-2| mm. 



Head subglobose, closely punctured and with sparse depressed 

 fulvous setse ; eyes large, coarsely granulate and meeting 

 inferiorly. Rostrum as long as prothorax, cylindrical, curved, 

 dark piceous but becoming paler at apex, evenly and strongly 

 punctured, bare, moderately shining. Antennce inserted a trifle 

 in front of middle, ferruginous. Prothorax rather shoi'ter than 

 the basal width, broadest at base, the sides lupidly narrowed to 

 apex where there is a broad but shallow constriction, base 

 rounded, apex broadly produced above the head ; upper surface 

 convex, with four blunt discal prominences on the anterior part, 

 the posterior part with large shallow punctures more or less 

 hidden by fine whitish-brown scaling, having a low bare central 

 carina ; the prominences clothed with denser yellowish- brown 

 scaling. Elytra jointly sinuate at base, obliquely truncate at 



