BY THOMAS G. SLOANE. 199 



with intercoxral part deeply channelled, truncate at base ; one 

 setigerous puncture on each side of base. Legs light; anterior 

 tibiae slender, tridentate, the teeth light, two fine external teeth 

 above the large ones. 



Length 15, breadth 5-5. 



Hah. — West Australia, Kalgoorlie (Gr. W. Froggatt ; Coll. 

 Froggatt). 



This species is characterised by its small size and slender 

 posterior tibise. Following the distribution of the species of 

 Carenum into groups adopted by me in P.L.S.N.S.W. viii. (2), 

 pp. 462, 466, its place would be with C. habitans, SI., though it 

 is evidently quite as nearly allied to the C. e/egfajis-group, and 

 indicates that these two groups should be united. It has some 

 affinity to 0. ru(/aium, Blkb., but can be distinguished at once 

 from it by the less prominent angles of the head, and by the 

 absence of an oblique longitudinal sulcus extending backwards 

 from above the eyes on each side of the head. 



I form a new group to receive Carenum rugatum, Blkb., and 

 n. sulcaiiceps (n.sp ), to be called the sulcatipes-growp. It has 

 seemed to me that the usual course of giving the name of the 

 species first described to the group cannot be adopted in this 

 case, because the name rugatum wovild be misleading if applied 

 to a group of species naturally hevigate. The sulcaticeps-gvoup 

 will be distinouished by the following characters : — Head with 

 frontal sulci short, subparallel, sul)orbital channels straight, 

 single, an oblique supraorbital sulcus on each side of the occiput; 

 anterior tibias tridentate. It may be noted that all the specimens 

 of this group which I have examined have had two punctures on 

 the anterior tibiae near the lower margin of inner side towards 

 apex. 



Carenum sulcaticeps, n.sp. 



Oblong-oval, Isevigate ; head with an oblique supraorbital 

 sulcus on each side, anterior angles prominent; prothorax lightly 

 lobate; elytra bipunctate towards apex; anterior tibiae tridentate. 

 Shining; head, disc of prothorax, undersurface and legs black; 



