BY THOMAS Q. SLOANE. 61 



the eyes, " ntioius grand que les tuLercules post-oculaires," and 

 further on says, "Corselet un peu plus long que large." Neither 

 of these remarks is applicable to my specimens, in which the 

 eyes are larger than the prominences inclosing them behind, 

 these being weakly developed, and the prothorax slightly 

 broader than long. The dentiform projection on the lower side of 

 the anterior thighs in the ^ is not mentioned either by de Castelnau 

 or M. Putzeys. 



Percosoma concolor, n.sp. 



Form elongate. Black, shining. Head not large ; a broad 

 transverse impression behind eyes, lightly marked across vertex ; 

 frontal impressions feeble, broad, short ; eyes rather prominent, 

 inclosed behind ; post-ocular prominences not large or protube- 

 rant ; antennae subfiliform. Prothorax not convex, cordate, 

 nearly as long as broad (5x5^ mm.), truncate in front, lightly 

 sinuate behind ; sides lightly rounded on anterior half, obliquely 

 narrowed behind, lightly sinuate towards base ; lateral border 

 narrow, extending from anterior to basal angle, a little thickened 

 at basal angles, these rather obtuse ; median line lightly marked ; 

 a transverse impression on each side a little in front of the base ; 

 several setigerous punctures along anterior half of niai-gin, the 

 posterior one placed just behind where the sides begin to narrow. 

 Elytra lightly convex, oval, wider than prothorax (12 x 7mm.), 

 finely striate ; the interstices flat ; shoulders rounded ; base 

 truncate, lightly declivous to peduncle ; apex broadly rounded ; 

 lateral border narrow, reaching from peduncle to apex ; a few 

 sparsely placed punctures a little within the margin. Ventral 

 segments lightly rugose towards sides, last with one puncture on 

 each side of anus. 



Length 22, breadth 7 mm. 



Hab. — Victoria; Marysville District (Track to Yarra Falls, Best). 



A single specimen in my collection received from Mi'. D. Best, 

 of Melbourne. I have not ascertained the sex of ray example, 

 but judging from the fact that the anterior thighs are as in the 

 9 of P. montamim, I believe it to be a c^. Its broader form and 

 the shape of the prothorax at once distinguish it from P. montanum. 



