248 MR. MARTIN JACOBY ON [Feb, 16, 



the female I cannot separate from that of C. polyliistor as 

 described by Suffrian. The female of G. mandihularis was not 

 known to Suffrian, who suspected it to be of similar coloration to 

 his G. polyhistor^ a surmise in which he was perfectly right ; this 

 sex has a fulvous thorax with an angulate black band and black 

 elytra, the legs being fulvous. The only differences which Suffrian 

 mentions between the two species are the moi'e narrow shape of 

 G. mandibtdaris, the differently marked elytra, and the legs which 

 are partly black in the male. I am, however, almost sure that 

 G. polyhistor is only the dark and spotted form, and the other 

 species the paler one in which the elytral spots are reduced to 

 two at the sides ; traces of the other markings can be seen in some 

 specimens ; and, as I said above, the female cannot be separated 

 from that of G. polyhistor. The name Achmnops mcmdibularis 

 must be omitted altogether on account of a mistake on my part. 



ISNUS SUTURALIS, Sp. n. 



Black, basal joints of the antennpe and legs flavous ; thorax 

 closely and strongly punctured ; elytra very closely punctate- 

 stiiate, flavous, with a broad, sutural, posteriorly pointed black 

 band, extending to below the middle. 



Length Ig millim. 



Head piceous or black, remotely punctured, the labrum fulvous, 

 eyes but slightly notched, not very closely approached ; antennje 

 veiy short, the last six joints broadly widened, black, the lower 

 four or five joints flavous ; thorax obliquely nairowed in front, 

 the basal margin pointed at the middle, the disc closely, evenly, 

 and comparatively strongly punctiired, black ; scutellum narrowly 

 elongate, black ; elytra short and broad, distinctly punctured in 

 very closely approached rows, the punctures stronger near the 

 suture than at the sides, the outer two interstices broad and 

 slightly convex, flnely punctured, the outer portion flavous, the 

 rest occupied by a broad blackish band which extends to the 

 shoulders at the base and gradually narrows at the suture, where 

 it ends in a point below the middle ; pygidium piceous, strongly 

 punctured ; underside nearly black, the presternum scarcely longer 

 than broad, flattened, its base truncate ; legs flavous. 



Bab. Malvern, Natal {G. Barker). 



This very small species agrees in all structural details with 

 "VVeise's genus Isnus (Arch. f. Naturgesch. 1898, p. 216); it may 

 be at once known by its coloi-ation. 



C(ENOBIUS MELANOCEPHALUS, Sp. n. 



Pale fulvous, the head black ; thorax impunctate, the sides 

 with a transverse depression ; elytra strongly punctate- striate, 

 the interstices convex, the apex black ; below and the legs fulvous, 

 the abdomen black. 



Length 2g-3 millim. 



Head black, the lower portion strongly punctured, the upper 



