62 STUDIES IN AUSTRALIAN ENTOMOLOGY, 



Percosoma carenoides, White. 



Broscus carenoides, White, Voy. Ereb. and Terr. p. 5, pi. 1, fig. 8. 



Mecodema percoides, Casteln., I.e. p. 163. 



P. carenoides, Putz., Stett. Ent. Zeit, 1868, p. 321. 



This is a well known species ; the following description will 

 enable it to be identified : — 



Black, shining, thighs and mouth parts reddish. Head very 

 large, smooth ; jaws long, greatly hooked at apex ; clypeus usually 

 with three setigerous punctures on each side ; eyes not very 

 prominent, inclosed behind ; post-ocular prominences small ; 

 several setigerous punctures, placed longitudinally in an elongate 

 fovea, above each eye, and, just outside this fovea, a single large 

 |)uncture on each side of vertex. Prothorax cordate (6 x 7jmm.), 

 lightly rounded on anterior part of sides, broadest a little behind 

 anterior angles, sharply constricted and transversely impressed a 

 little before the base, — ^the sides being straightened to meet the 

 base ; lateral margins broad, interrupted at basal constriction ; 

 a row of punctures along each lateral margin from anterior angle 

 to basal constriction ; median line lightly impressed. Elytra not 

 convex, oval (14x8;|mm.), very finely striate; the interstices 

 flat ; the 5th stria with about a dozen punctures along its course, 

 these more closely placed near base and apex, smaller towards 

 apex. 



Length 26-28, breadth 81 mm. 



Hab. — Tasmania. 



Percosoma sulcipenne. Bates. 



P. sulcipenne. Bates, Cist. Ent. ii. 1878, p. 317. 



I have a single specimen of this tine species which is found in 

 the N. W. parts of Tasmania. The following is a brief description. 



Form elongate, robust. Black, opaque, head very large, not 

 narrowed or transversely impressed behind, rugulose in front ; 

 jaws long and hooked at apex ; eyes round ; a rounded promi- 

 nence behind each eye about as large as the eye and equally 

 prominent ; several setigerous punctures, placed in an elongate 

 foveiform depression, above each eye, and three large punc- 



