150 



Diplocotes strigicollis, Lea. 

 On the male of this species the subapical joint of the 

 antennae is considerably larger than on the female, and the 

 spine, on each side of the prothorax, is rather more acute. 

 The type was recorded from " South Australia," but it has 

 since been taken from nests of a small black Iridomyrmex at 

 Adelaide and Port Lincoln. 



Hexaplocotes sulcifrons, Lea. 



The late Mr. F. du Boulay took several specimens of this 

 species in ants' nests at Beverley; they are all smaller than 

 the type, with the prothorax and elytra deep black, and the 

 clothing of the elytra somewhat sparser and more seriate in 

 arrangement. The type was also from Western Australia, 

 although recorded by an oversight by Dr. Mjoberg as Tas- 

 manian. As a matter of fact I have never seen any myrme- 

 cophilous species of Ptinidae in Tasmania. 



POLYPLOCOTES PERFORATUS, n. Sp. 



PI. xii., figs. 7, 8. 



Black ; some body-parts and most of the appendages 

 obscurely diluted with red. Metasternum, a vitta towards 

 each side of abdomen from the base to the fourth segment, 

 and the intercoxal process of prosternum and of mesosternum, 

 with very dense, whitish pubescence, somewhat similar (but 

 more golden) pubescence at base of head; prothorax and 

 elytra glabrous. 



Head with dense and irregular punctures; bisinuate in 

 front to receive bases of antennae, in front of antennae 

 narrowly elevated, with below the elevation a conspicuous 

 perforation, face flat with a narrow median line; clypeus 

 flat, subelliptic, on the same plane as the face and mandibles ; 

 labrum very small, on each side a wide groove for the recep- 

 tion of the base of an antenna. Eyes narrow and finely 

 faceted. Antennae stout, most of the joints finely granulate, 

 first thick and somewhat curved, second with base curved 

 under apex of first, third-seventh subequal in length but 

 slightly dilating in width, eighth longest of all and some- 

 what flattened, ninth much shorter than eighth, slightly 

 curved, its tip incurved to middle and slightly hollow. 

 Prothorax about as long as wide, sides gently increasing in 

 width from apex to base, and nowhere foveate or incurved; 

 densely, finely, and obliquely punctate-striate, but about 

 base with punctures only, with an irregular and not very 

 long semi-double median line. Elytra at base slightly wider 

 than prothorax, sides gently dilated to about the middle and 



