1900.] Catalogue of the Coleoptera of So2tth Africa. 501 



set, deep, foveate punctures ; the elytra are as in the male and 

 equally roughly punctured, but there are five more distinct strias on 

 the discoida] part. 



Length 6-5^ mm. ; width 3-3^ mm. 



Hab. Southern Ehodesia (Salisbury). 



Orphnus plebeius, n. spec. 



Male : Piceous red, shining, glabrous ; head nearly impunctate 

 and having in the central part a sharp conical tubercle or a small 

 horn ; prothorax very deeply excavated from the anterior part to close 

 to the base, the walls edging the excavation are similar in shape 

 to those of 0. pugnax, but they are only very slightly punctate out- 

 wardly, and the sides are almost impunctate along the outer margins ; 

 scutellum ogival, impunctate ; elytra moderately convex, distinctly 

 striate along the suture, the second stria is nearly obliterated, but 

 the third one is quite distinct, and the fifth one noticeable, the 

 punctures are deep but not rugose, greatly scattered and almost 

 obliterated in the rounded posterior part ; metasternum with a 

 median slightly impressed line and a shallow basal impression. 



In the small development the head has a transverse triangular 

 median tubercle only, and instead of an excavation on the prothorax 

 there is an anterior sub-triangular impression with a slightly raised 

 rounded ridge on each side of it near the apex, the sides are mode- 

 rately closely punctured, but the median part is smooth ; the valves 

 of the penis are longer than in fig. 37 of plate xxxviii. (0. zamhesianus) , 

 less emarginate inwardly near the base, and with the dilated apical 

 process sharper at tip, vertical and sharply angular behind. 



Female unknown. 



Length 8 mm. ; width 4J- mm. 



Hah. Southern Ehodesia (Enkeldoorn). 



Okphnus bilobus, Klug, 

 Monatsb. Berl. Acad., 1855, p. 656. 



0. mashumis, Per., Trans. Entom. Soc. Lond., 1896, p. 158. 



Male : Black or piceous black, shining ; head impunctate and 

 having in the centre a vertical horn flattened in front, and also in the 

 hind part of the base, this horn, which varies in size, does not reach 

 quite to the height of the anterior part of the walls of the prothoracic 

 excavation which are strongly emarginate at tip and perpendicular 

 in front in the same manner as in 0. pugnax (pi. xxxvi., fig. 29), the 

 excavation is smooth and does not quite reach the base, but is pro- 



