1907.] Catalogue of the Goleoptera of South Africa. 519 



Plagiochilus intrusus, Wasm., 

 Illustr. Zeits. f. Entomol., v., 1900, p. 83. 

 P. intrusus, Pering., Ann. Soc. Ent. Fr., 1900, p. 71. 



Black, moderately shiny, glabrous, antennal club chestnut-brown ; 

 head without any transverse keel, clypeus very convex in the centre, 

 impressed on each side of the anterior part, and deeply emarginate 

 in front, very closely punctate like the head ; prothorax with a 

 median, discoidal, longitudinal impression somewhat broad but 

 interrupted in front and behind, and a sub-quadrate marginal one 

 on each side of the straight base, the surface is covered with round 

 punctures nearly confluent in the anterior part, but the posterior 

 is reticulate plicate ; scutellum plicate ; elytra slightly broader than 

 the prothorax, nearly parallel, faintly costulate, numerously striolate 

 in the dorsal part ; the strioles are geminate, and the sides deeply 

 punctate ; pygidium transversely striolate and conspicuously pro- 

 duced in the centre into a large, round swelling ; under side 

 glabrous, abdomen punctate, pectus strigillate ; legs strigillate 

 punctate, glabrous, but the inner part of the intermediate and 

 posterior tibiae have a series of remote ciliae ; claws moderately 

 short. 



Length 9-10 mm. ; width 3J-3|- mm. 



Hab. Southern Ehodesia (Salisbury, Upper Hanyani Eiver). 



This species is myrmecobious, and was found by Mr. G. A. K. 

 Marshall entering the formicarium of Plagiolepis custodiens, Sm. 



Plagiochilus diversus, n. sp. 



Black, only moderately shiny, antennae and palpi ferruginous ; 

 ligular part plane, not incised in front ; clypeus not convex in the 

 centre, parallel, rounded laterally in front and with the anterior 

 margin sub-triangularly reflexed, head simple, both head and clypeus 

 very closely and somewhat deeply punctate ; prothorax quite straight 

 laterally in the posterior part, strongly sloping in front, deeply and 

 very closely punctate in the anterior part and transversely plicate 

 in the posterior ; along the lateral margin and also part of the basal 

 there extends a cretaceous band ; scutellum strigillate ; elytra not 

 broader than the prothorax, parallel, depressed, not distinctly costate, 

 but having on each side of the suture, and at some distance from it, 

 two duplicate striae, another but less distinct one at about the median 

 discoidal part, and a fairly plain one above the sides, the surface 

 is covered with an irregular network of punctures, closely set and 

 confluent on the sides, each elytron has six series of very short, 



