BY W. MACLEAY, JUN., ESQ. 177 



grooves are almost parallel, diverging slightly in front towards 

 the anterior angles of the head. The thorax is longer than 

 broad, truncated in front, rounded, and somewhat lobed behind, 

 with slightly reflexed lateral margins, and a slight depression 

 near each posterior angle. The elytra are oblong, convex, and 

 parallel-sided, and are marked with four punctures, one close to 

 each humeral angle, the others near the apex. The fore tibiae 

 are bidentate externally. 



2. — Cakenum ambiguum. 



Nigrum nitidum subangustum, thorace postice utrinque foveo- 

 lato, elytris quadripunctatis, tibiis anticis extus bidentatis. 



Long. 7| lin., lat. 2 lin. 



Hab. King George's Sound. 

 The colour is black, inclining to pitchy. The facial grooves 

 are rather more curved than in the last descinbed species. The 

 thorax is truncate in front, and rather rounded behind, with 

 parallel sides, and a round shallow depression near each posterior 

 angle. The elytra taken together ai-e of an elongated oval form, 

 and are marked with four impressed punctures, one near each 

 shoulder, the others near the apex. The fore tibise are bidentate 

 externally. 



3. — Carenum subquadratum. 



Nigrum subnitidum oblongum subplanum, thorace subquadrato, 



elytris quadripunctatis, tibiis anticis extus bidentatis. 

 Long. 10 lin., lat. 3 lin. 

 Hab. South Australia. 

 This insect is of a rather dull black. The facial grooves are 

 nearly parallel. The thorax is nearly as broad as long, with the 

 base rounded and margined, and with a shallow depression near 

 each posterior angle. The elytra are rather flat, and, when 

 taken together are of an oblong form, widening slightly towards 

 the apex. They are marked with four punctures, two near the 

 base and two near the apex. The fore tibia3 are bidentate ex- 

 ternally. 



The specimen from which the foregoing description was 

 taken, is in the collection of the late William Shai'p MacLeay, 



