BY THO.MAS CJ. SLOANE. 395 



rounded, hut a little marked ; border reflexed, widely so at poste- 

 rior angles, thick and strongly reflexed on hase ; median line 

 strongly impressed ; a short arcuate transverse impression at end 

 of median line near base ; two marginal setigerous punctures on 

 each side as usual in the genus. Elytra widely rotund ate (14-6 x 

 14 mm.), widely rounded at apex, very convex ; the base truncate 

 on each side, widely and very lightly emarginate in middle ; 

 liumeral angles almost rectangular, their summits rounded ; bor- 

 der reflexed, widely so at humeral angles, passing round these on 

 to the base on each side ; margin wide, declivous on apical curve, 

 flat and widely explanate at shoulders ; a row of fine punctures 

 (6) on base of each elytron ; a row of fine punctures along mar- 

 gins from shoulders to apex. Anterior tibife bidentate : external 

 I'idge with three small projections above the larger teeth. 



Length 32, breadth 14 mm. 



Hah. — Murchison District, W.A. (In the collection of Mr. C. 

 French). 



I have not ascertained the sex of the single specimen on which 

 the description above is founded, Ijut have no doubt, from the 

 shape of the elytra, that it is a ^. Among the species known to 

 me its nearest ally is E. politus, 81., from the MacDonnell Ranges. 

 Only the 9 of E. j)olUus has been recorded, and E. terrenus shows 

 the following non-sexual differences from it : the prothorax is 

 more transverse, more equally rounded on the sides, the anterior 

 angles less advanced and more obtuse ; and the orbits are less 

 sharply prominent below the eye. It is also almost certain, 

 judging from other species, that the elytra of the ^ of E. politus 

 will prove far more strongly emarginate at the base than those of 

 E. terrenus. It has also a general resemblance to E. minor, 

 Macl., and E. concolor, SI. ; from the former the wider prothorax, 

 not the least lobate in the middle of the base, at once distinguishes 

 it : while from the latter the prothorax less rounded behind, with 

 the anterior angles less advanced, and the border less prominently 

 upturned at the posterior angles : and the elytra less emarginate 

 on the base with more rectangular humeral angles, !kc., easily 

 separate it. 



