632 NEW SPECIES OF AUSTRALIAN COLEOPTERA, 



without the long hairs, the triangle of white hairs feebly marked, 

 &c., &c. Length 15, rostrum 5|, scape 2|, first joint of funiculus 

 ^, second 1 mm. Width 7f , muzzle 1 mm. Depth 7^ mm. 



I have a pair (obtained in copula) of this marvellous beetle, 

 which I found on a fallen log on the Tweed River; it also occurs 

 in Southern Queensland. 



The extraordinary antennae of the male will at once distinguish 

 it from its congeners; it comes closest to P. cristatus, Pasc. 



C H R Y S O M E L I D .E. 

 POLYOPTILUS IRREGULARIS, n.sp. 



Elongate, convex, shining. Brownish-red; legs and antennae 

 paler, lower surface and coxte darker, eyes black. Lower surface, 

 antennae (except basal joint) and legs with very minute pubes- 

 cence. 



Head trigonal from in front of the eyes, cylindrical behind; 

 densely punctate above, beneath less densely and deeply; antennaa 

 slender, reaching to apical third of elytra; 1st joint thick, as long 

 as 2nd-3rd, 3rd one and a half times as long as 2nd, 4th-llth 

 cylindrical, very gradually increasing in length and decreasing in 

 width, 11th not one and a half times as long as 4th. Prothorax 

 longer than wide, truncate at base and apex (where it is darkest), 

 at its widest near the apex, about as long as the head and a little 

 wider than across the eyes; less densely and more irregularly 

 punctate than the head, several shallow depressions near the base. 

 Scutellum triangular, punctate, depressed in the middle. Elytra 

 about twice as wide and about thrice as long as prothorax, striate- 

 punctate, both striae and punctures very irregular, especially so 

 towards apex; interstices sparsely and irregulai'ly punctate; sides 

 parallel to near the apex; shoulders slightly rounded, prominent, 

 depressed and irregularly punctate at their sides inwardly. 

 Beneath very densely and extremely minutely punctate, the 

 punctures largest about the coxae and apex of mesosternum; 

 metasternum deeply sulcate. Legs subequal in length, the inter- 



