Australian and Tasmanian Cryptocephalides. 389 

 LOXOPLEURUS GRAVATUS, Clip. 



(Plate XXIII, fig. 66.) 



Both sexes of this species were known to Chapuis, but 

 the male described by him and coloured as the female may 

 not be the normal form, I have seen but one specimen of 

 it. The ordinary male (of which eight specimens are before 

 me) has the basal half (sometimes slightly more and some- 

 times slightly less) of the elytra reddish-yellow, the two 

 colours being sharply defined ; occasionally the suture is 

 narrowly edged with black. In the female the second and 

 third and sometimes parts of the other joints of the 

 antennae are pallid, as well as the lower surface of the 

 first. 



Ifab. Queensland: Brisbane; N. S. Wales: Lane 

 Cove, Sydney, Galston, National Park. 



LoXOPLEURUS OBTUSUS, Chp. 



This is a common species about the Swan River, and of 

 which only the male was known to Chapuis. The pro- 

 thorax of the male is usually plain black, but occasionally 

 with a bluish gloss ; in one specimen under examination 

 the tibiae are dusky red, but they are usually black. The 

 female differs in being slightly larger, the antennae shorter, 

 the prothorax red, with a very narrow basal margin of 

 black and occasionally a feeble blackish cloud in the 

 middle of the base ; the elytra are usually deep blue, 

 sometimes violet-blue, and occasionally dark bluish-green. 



LoxOPLEURUS SEMICOSTATUS, Chp. 



This species is slightly variable in colour. The scu- 

 tellum is either entirely black or (as in the type) black at 

 the base only. The dark sutural marking sometimes 

 extends to the middle and sometimes is scarcely perceptible 

 even at the base. 



The male (unknown to Chapuis) differs in being much 

 smaller (2i-3 mm.), the antennae longer (in the female 

 they are shorter) than the body and more or less infuscate, 

 the third and the apex of the first and second tarsal 

 joints are also dark, and the under-surface is black, with 

 the exception of the anterior angles of the presternum and 

 the apical segments of abdomen. 



In general appearance it resembles some of the varieties 



