1908.] Catalogue of the Coleoptera of South Africa. 577 



by an interval smaller than the punctures, glabrous in the dorsal 

 part, briefly pubescent laterally ; base narrowly marginate ; elytra 

 very briefly setulose, narrowly striate, the striae shallow, indistinctly 

 punctate, the intervals, which are of equal width, filled with a closely 

 set, elongated punctuation with raised intervals forming a sort of 

 longitudinal sinuous, shallow network ; pygidium covered with 

 shallow sub-contiguous punctures ; inner spur of anterior tibiae 

 strongly incurved at tip. 



Closely allied to 0. discretus, Per. (Cat. i., p. 239), but differing in 

 the colour of the antennae, and also in the sculpture of the elytra, 

 which in 0. discretus consists in the dorsal part of a double row of 

 somewhat uneven shallow punctures, but not of a longitudinal 

 network as in 0. lacustris. 



Length 13-13J mm. ; width 5-5J mm. 



Hab. Mozambique (Beira). This species was originally described 

 from Nyassaland. 



Onthophagus serenus, Pering., 



Plate XLVIIL, fig. 18. 



Ann. S. Afric. Mus., iii., 1904, p. 221. 



Black, shiny, with extremely minute hairs in the punctures of the 

 head and prothorax, hardly pubescent underneath, club of antennae 

 black; clypeus deeply incised in front, and with the angles very 

 sharp and reflexed, genae triangular, projecting, there is no distinct 

 clypeal suture or keel, but a slight carinulate elevation reaching the 

 two genae, the frontal part is simple, but there is a distinct, oblique 

 supra-ocular ridge ( $ ) ; the prothorax is broader than long, rounded 

 laterally, the outer margins are not highly carinate and the base has 

 no distinct fold, the surface is covered with sub-contiguous cicatricose 

 punctures, coarser on the sides than on the disk ; elytra longer than 

 the prothorax with the striae distinct and the plane intervals finely 

 granulose ; pygidium broader than long, very closely punctulate, and 

 glabrous, inner spur of anterior tibiae curved inwards at apex in both 

 sexes, but that of the male is thicker. 



This species is allied to 0. lacustris, Har., and 0. discretus, Per., 

 but it differs in the incised clypeus, and also in having the intervals 

 of the elytra normally granulose instead of being longitudinally 

 shagreened as in the former, or sub-scabrose punctate as in the last- 

 named species. 



Length 1\ mm. ; width 4-4J mm. 



Hab. Southern Ehodesia (Sebakwe, Enkeldoorn) 



