1900.] Catalogue of the Colcoptcra of South Africa. 257 



narrowly geminato-striate, and with the first and second intervals 

 somewhat raised and all filled with deep but rugose punctures, the 

 walls of which are raised and irregular; the first and second in- 

 tervals are less pitted than the others in the two examples which 

 I have seen, and the humeral callus is not very prominent ; pygi- 

 dium very closely pitted and not thickly pubescent ; metasternum 

 aculeate at tip and quite impunctate in the median part except along 

 he aculeate part, and without a trace of a longitudinal impressed 

 line. 



Male unknown, but probably differing from the female in having 

 a more .or less blunt tubercle in the centre of the vertex, instead of 

 a high, transverse carina, and two small, rounded tubercles in the 

 anterior part of the prothorax, somewhat as in 0. brucei. 



Length 10^-11 mm. ; width 7-7^ mm. 



Hab. Southern Ehodesia (Buluwayo, Salisbury). 



Onthophagus seniculus, n. spec. 



Male : Black, moderately shining, antennae yellow ; head deeply 

 and somewhat roughly punctured and denser on the clypeus which 

 is semicircular with the gense gradually rounded and is somewhat 

 broadly but not deeply emarginate at tip, and has the angles of the 

 emargination rounded, there is a frontal arcuate carina very little 

 raised, and a transverse juxta-basal one on the vertex which is also 

 not much raised but is nevertheless higher than the frontal ; pro- 

 thorax moderately convex, marginate all round and slightly acumi- 

 nate in the centre of the base, it is covered with not very closely set 

 granules and is densely but briefly pubescent, the median, sub- 

 acuminate part of the base which is depressed has no granules ; 

 elytra ovate, distinctly geminato-striate, striae narrow, punctulate 

 and with the walls slightly raised, intervals plane and having each 

 two series of setigerous fine granules set moderately close to one 

 another, second interval a little broader than the third, humeral 

 callus distinct ; pygidium moderately closely punctured ; meta- 

 sternum distinctly aculeate at tip, nearly quite smooth in the median 

 part but punctulate on the sides of the aculeation and having no 

 median impressed line or basal impression ; inner part of anterior 

 tibiae sharp but not spinose in the male, apical spur somewhat 

 thickened and curving outwardly. 



Female unknown. 



Length 6 mm. ; width 3^ mm. 



Hab. Ovampoland (Omrramba). 



17 



