Australinn and Tasmanian Coleoptera. 127 



lively tliin. just passing base of prothorax, most of the joints 

 rather lig-htly transverse. Prothorax and elytra with outlines 

 and punctures as in preceding species. Ahdomen feebly dimin- 

 ishing in width posteriorly. Length 2 (vix), to apex of elytra 

 ■1-5 mm. 



Hah. — Victoria : Ararat, in nests of Ectatomma metalUcum 

 (H. W. Davey) ; N.S. Wales : Forest Reefs, in nests of same 

 species of ant (A. M. Lea). 



In build close to preceding species, but head smaller and 

 entirely pale, and elytra paler. The pale head will readily dis- 

 tinguish from all the other species here described. The elytra, 

 even in the darkest specimens, are not very dark. 



Polylohus ectatommae, n.sp. (Fig. 29.) 



Reddish testaceous, abdomen somewhat paler than prothorax, 

 head more or less infuscated, elytra more or less piceous brown, 

 but at base but little, or not at all, paler than prothorax, legs 

 and palpi paler than abdomen, apical half or two-thirds of 

 antennae infuscated. Head, prothorax and elytra feebly shin- 

 ing. 



Head rather longer than wide, base rather strongly rounded. 

 Eyes small and inconspicuous. Antennae rather thin, distinctly 

 passing base of the prothorax, but few of the joints decidedly 

 transverse. Prothorax lightly transverse, front angles mode- 

 rately, the hind angles feebly rounded, sides very feebly 

 rounded ; base with three small and very feeble impressions ; 

 with dense minute punctures. Elytra very little longer and 

 scarcely wider than prothorax, basal tmd apical angles rounded, 

 sides elsewhere parallel, with dense minute punctures. Ahdomen 

 parallel, not much narrower than elytra; punctures feeble. 

 Length 1 4-5, to apex of elytra .4-5 mm. 



Hah. — Tasmania : Launceston, in nests of Ectatomma 'inetal- 

 licum (A. M. Lea). 



Several specimens have the head no darker than the pro- 

 thorax, and two have the middle of the abdomen very feebly 

 infuscated. 



More parallel-sided and rather more depressed than any of 

 the preceding species, and with the prothorax evenly rounded on 



