cxii Mr. E. Newmans 



of the head are black, naked and shining : the antenna? when reversed scarcely reach 

 the apex of the elytra, they are 11-jointed, the basal joint of a form very common 

 among the longicorns, somewhat shorter than the head, moderately slender at the base, 

 but much stouter at the apex, it is perfectly black and glabrous; the second, as usual, 

 is very short, broader than long ; the third and fifth are of equal length and each 

 about equal to the first ; the fourth is shorter and the sixth longer than either of these ; 

 the joints from the second to the sixth, both inclusive, are clothed with a thick, black, 

 velvety down ; the remainder, mas., the seventh to the eleventh inclusive, are naked, 

 slender, and decrease gradually in length ; the seventh, eighth, ninth and tenth are 

 silvery-gray, with a black apex ; the eleventh is entirely black. The prothorax is 

 longer than the head, its disk is somewhat depressed, deeply and irregularly punctate 

 and perfectly black ; its anterior margin is straight and in width exactly equal to the 

 head ; its posterior margin convex and much wider than the anterior ; its lateral mar- 

 gins nearly straight but of course not parallel, and terminating posteriorly in a strong 

 tooth. The mesothorax as seen behind the prothorax, together with its scutellum, is 

 covered with a short golden down. The elytra at the base are considerably wider than 

 the prothorax, and altogether w r ide in proportion to their length, still sufficiently long 

 to conceal the abdomen ; they gradually decrease in width towards the apex, where 

 they are rounded but furnished with a small yet very obvious marginal tooth at some 

 distance from their sutural extremity ; besides the suture itself, which is somewhat 

 keel-like and glabrous, each elytron has two glabrous discoidal keels, the first nearest 

 the suture is very decided, it commences at the base and terminates near the apex, it 

 is perfectly glabrous, iinpunctate, and of a bright yellow colour : the second commen- 

 cing at the shoulder of the elytron and running parallel to the first, is glabrous, im- 

 punctate and black, a small apical portion alone excepted, which is yellow ; the inter- 

 stices between these keels as well as the space exterior to them is black, glabrous, and 

 coarsely and deeply punctate. Beneath, the prothorax is punctate as above, it forms 

 a truncate cone, no ridge or line of demarcation separating its dorsal and sternal sur- 

 faces ; the metasternum is black and very polished, but more deeply punctate than 

 the prosternum ; anteriorly it is produced into a strong tooth-like projection, and on 

 each side it has an amorphous pale-coloured patch of velvety down : the abdominal seg- 

 ments are black, brilliantly polished, and under a lens of moderate power appear to be 

 impunctate ; the terminal segment is exserted and truncate at the tip. The fore and 

 middle legs are of average size and proportions ; the hind legs are long, the tip of the 

 abdomen not nearly reaching the extremity of their femora ; all the femora are mani- 

 festly incrassated externally, and all the tibia have two spines at the apex. 



Not having seen any insect very similar to the one now described, I have found 

 some difficulty in deciding what characters are to be regarded as merely specific, and 

 I feel much distrust as to the separation I have attempted of generic and specific de- 

 finitions. 



Hab. — North Australia : in the cabinet of Mr. Samuel Stevens, whose zeal and 

 energy in importing exotic insects has already added so largely to our entomological 

 knowledge. 



