1900.] Catalogue of the Colcoptcra of South Africa. 255 



rounded at tip and with the margin shghtly recurved, frontal carina 

 very slight, between this frontal carina and the vertex there is a 

 smooth, raised, longitudinal, median line, and on each side of the 

 base there is a faint trace of a small tubercle above the eye, the 

 whole head is covered with deep, closely set punctures, somewhat 

 scabrose on the clypeus ; prothorax convex, ampliate laterally, not 

 marginate along the base which is strongly aculeate in the middle, 

 it is covered with deep, closely set punctures somewhat scabrose on 

 the sides, and in the centre there is a longitudinal smooth line 

 reaching from apex to base ; elytra ampliato-ovate, narrowly striate, 

 the striae impunctate, intervals plane and covered with deep, very 

 closely set punctures, humeral callus not very prominent ; meta- 

 sternum aculeate, smooth only in the centre. 



Female : Apical spur of anterior tibiae bent inwardly at tip. 



Length 11-13 mm. ; width 7-8 mm. 



Hah. Natal (Isipingo, Durban, Estcourt). 



Onthophagus optivus, n. spec. 



Coppery red, shining, pubescent ; shape and size of 0. acicidatus 

 and very closely allied to it. 



Female : Clypeus distinctly sub-aculeate, granular on the vertex 

 and scabroso-punctate on the clypeus ; prothorax ampliate laterally, 

 base not marginate and sharply aculeate at middle, it is convex, 

 depressed behind in the middle above the base, and has there a 

 distinct impressed line in the centre of the depression, it is covered 

 with closely set granules except in the posterior impression which is 

 smooth, and is surrounded by some punctures, from the apex to the 

 impression there runs a slightly raised, smoother line, which is not, 

 however, as distinct as in 0. aciculatus ; the shape of the elytra and 

 also the striae are similar to those of the last-named species, but the 

 intervals instead of being deeply but regularly punctured are ex- 

 tremely rugose, the walls of the punctures being more in relief ; the 

 rest as in 0. aciculatus. 



Length 10 J mm. ; width 6 J mm. 



Hah. Southern Ehodesia (Mtoko). 



Onthophagus bkucei, Eeiche, 

 Plate XXXVL, fig. 11 ; Plate XXXVIII. fig. 23. 

 Voyag. Galin. Abyss., 1850, p. 316, pi. xix., fig. 6. 



Metallic green, shining, briefly pubescent, head and anterior part 

 >of prothorax slightly coppery red ; clypeus acuminate, not emargi- 



