BY THOMAS G. SLOANE. 201 



placed in a deep wide channel, as has also the only male specimen 

 (length 17 mm.) I have. 



A specimen from same locality differs from the type and may 

 be called : — 



Var. A. 5. Differs from type by more elongate shape, elytra 

 longer and more depressed, colour duller; this form approaches 

 C rugatuni, Blkb. Length 24, breadth 8-4 mm. 



Two other Carenums are in my collection ; probably each 

 represents an undescribed species, but at present I place them 

 under C. sulcatipes as varieties. 



Yar. B. Differs from type by having the elytra bright metallic- 

 purple (the disc of the prothorax also flushed with purple), the 

 prothorax more strongly lobate on base and with the anterior 

 angles more porrect. Length 17 '5, breadth 6 "5 mm. 



Hub. — Norseman Diggings, W. A. (Received from Mr. French). 



Var. C. Differs from type by being narrower and more convex; 

 prothorax more strongly lobate ; prothorax and elytra widely 

 margined with green. Length 17, breadth 6 '2 mm. 



Hab. — South Australia. (Received from Mr. G. Masters). 



A separate group may be formed for Carennm planipenne, 

 Macl., and closely allied species ; this planijjenne-gvou]) will 

 precede the marginatum-gvouTp, from which it will be separated 

 by the presence of a supraorbital sidciis oil each side of the occiput; 

 the inferior ridge of the anterior tibise approaches the form found 

 in the dispar-group, being more strongly serrate than in typical 

 members of the marginatum-gvowp. The species comprised 

 in the planipenne-gYoupn\xvahQv three,* viz., C . 2')lo'nipenne, Macl., 

 C. vicinu7n, SI., and C. purpicreum, n.sp. 



Carenum purpureum, n.sp. 



Lsevigate, form light, depressed ; head as in C. planipenne, 

 Macl., (suborbital channels single); prothorax as in 6'. jilanipenne; 



* Possibly C. carhonarium may also be a member of this gi'oup, vide 

 post, p. 204. 



