1 70 Mr. C. N. Barker on 



XrX. — Xew South African Species of the Genus Chhoiiius 

 (Carabidie). By C. N. Barker, F.E.S. (of the Durban 

 jMiiseuiu). 



The types oE these five species are contained in tlie Durban 

 Museum Collection. Co-types of C. orbiculicollis (a male) 

 and of C. cavilabruni (a female) are retained in the col- 

 lection of the donor, the Rev. J. A. O'Neil, of Salisbury, 

 S. Rhodesia. Tlie other three species are unique. 



Chlcenius orbiculicollis. 



Length 12i mm.; width 5 mm. 



Briefly pubescent above, glabrous beneath ; head and pro- 

 thorax metallic greenish blue, shiny ; elytra deep violaceous 

 blue, less shiny, and with, on either side, a supra-apical 

 orange subovate spot evenly rounded above, but a little 

 irregular below, occupying intervals 4 to 7 inclusive. 

 First three joints of antenna? and the palpi reddish testaceous, 

 the remaining joints of antenna black ; labrum, mandibles 

 basally, and margins of prothorax narrowly deep red. Legs 

 testaceous yellow. Underside black, shiny, and iridescent. 



Head short, broad, densely and evenly punctate, frontal 

 foveas subobsolete, transverse suture distinct ; palpi: J" ^ 

 terminal joints all securiform, but maxillaries less widely ; 

 $ ? labials, securiform, maxillaries, short, explanate, and 

 squarely truncate; antennpe : first three joints glabrous, the 

 remainder pubescent and compressed. 



Prothorax transverse (3^ x 3), densely, deeply punctate, 

 apex truncate, frontal angles declivous, rounded, and not 

 produced, sides ampliate, nearly evenly rounded from apex 

 to base, hind angles obtusely rounded, outer margins very 

 narrowly reflexed, the groove within shallow, base and apex 

 aI)out equal in width, the former emarginate, disc convex, 

 median line indistinct, broadly depressed, but hardly foveate 

 on either side of base. 



Elytra oblong-ovate, alike in both sexes, base about 

 one-third wider than prothorax at base, shoulders broadly 

 rounded, widely margined, gently ampliated to beyond middle 

 and rounded to, with the usual slight sinuation before, apex, 

 a little convex above, briefly clothed with yellowish pubes- 

 cence, deeply striate, intervals raised and a little carinate, 

 densely and minutely punctate. 



Underside glabrous, very shiny and iridescent, external 

 parts remotely butdeepl}'^ punctate ; abdomen smooth, except 

 for some superficial plications about lateral margins. 



