254 Mr. M. Jacoby on 



Head minutely granulate and extremely finely and remotely 

 punctured when seen under a very strong lens, the clypeus separated 

 by a deep semicircular groove, antennae black, short, the basal joint 

 very robust, nearly subquadrate, the second short, the third longer 

 than the fourth joint, the terminal five thickened, the apical joint 

 ovately pointed ; thorax about twice and a half broader than long, 

 the sides nearly straight, slightly rounded and narrowed towards the 

 apex, all the angles distinct but not acute, the surface finely and 

 remotely punctured, intermixed with some still smaller punctuation, 

 the latter more closely placed but scarcely stronger at the sides than 

 at the middle, scutellum small ; elytra widened towards the middle, 

 very convex, much more strongly punctured than the thorax, the 

 punctures irregularly and not closely placed, the suture unaccom- 

 panied by an impressed line, the interstices very minutely granulate, 

 without smaller punctures, the space near the lateral margins rather 

 broadly impunctate, the latter itself accompanied by a row of deep 

 punctures ; epipleuree very broad and smooth, impunctate and non- 

 pubescent ; prostemum very narrow with a central raised ridge, 

 claws simple. 



Hah. Transvaal. 



I find it quite impossible to determine with any degree 

 of certainty the unicolorous aeneous species of this genus 

 described, or rather diagnosed, by Vogel in his monograph ; 

 the differences he points out in his species are so vague 

 and unsatisfactory, and apply only partially to any species, 

 and all details so necessary are withheld, that it seems to 

 me to be better to ignore all those of his species which are 

 mentioned in this way. I cannot refer the present insect 

 to any of that author's species, since the punctuation of 

 the thorax and that of the elytra do not agree, as far as 

 I am able to judge ; the ridge of the presternum seems 

 another distinguishing character of the present insect, 

 which may possibly be Vogel's C. natalensis, although the 

 lateral portions of the elytra near the margins are not 

 raised as the author gives it. 



Polystida confluens, Gerst. var. marshalli, sp. n. 



Reddish fulvous, the terminal joints of the antennae, the sides of 

 the breast and the legs black, thorax variolose-punctate at the .sides 

 only, with four small black spots, elytra finely punctate-striate, the 

 interstices minutely punctured. 



Var. Thorax without spots. 



Length 8 millim. 



