276 Records of the S.A. Museum 



Head gently convex, with crowded concealed punctures. Prothorax more 

 tliaii thrice as wide as long, sides strongly and almost evenly narrowed from base 

 to apex; with crflv^■ded and rather small, normally concealed punctures. Elytra 

 almost evenly convex, with sifles rather strongly rounded: with rows of large, 

 deep, concealed punctures. Uudcr-siirfacc with crowded punctures, scarcely 

 larger on metastenuim than on adjacent coxae, l.ength. 3 '5 mm. 



Hah. Western .\ustralia: Cue, from a nest of Odniitaiuachiis coriariiis 

 (H. W. Brown). Tyjie (unique). I. 10708. 



Th€ type heing unique and in good condition it has not been specially 

 abraded for description, but several parts were partly abraded when it was 

 acquired. The clothing of the head and prothorax is of an almost uniform pale 

 muddy-brown, on the elytra there are numerous pale spots, giving the surface a 

 speckled appearance. The setae are stiff and erect, and thinner than on the other 

 larger species of the genus, they do not form fascicles on the prothorax, and hut 

 few and feeble ones on the elytra : on each of tliese there is an oblique one at 

 the sununit of the apical slope on the second interstice (this is the most distinct 

 of all. but even it is small), two feeble ones on the third interstice, before and 

 about the middle, and two or three on the fifth, beyond the middle. In Blackburn's 

 table the species would be associated with Microchaetes nigroT'arins, from which 

 it differs in its fewer fascicles, and by the considerably longer setae ; on that 

 species the setae are shorter, thicker and usually subclavate. 



MICROCHAETES HYSTRICOSUS sp. nov. 



Black, some parts obscurely reddish. Witli dense muddy-brown clothing, 

 mixed with numerous long erect setae, in places condensed into loose fascicles. 



Head gentlv conxe-x; ]iunctures dense and normally concealed. Prothorax 

 almost four times as wide as long, apex less than half the width of base; jnuic- 

 tures normally concealed. Elytra with sculpture concealed. I'lidcr-siirface 

 with crowded concealed punctures. Length, 2 3 mm. 



Hab. Tasmania: Strahan. in moss (A. M. Lea). Type (uniciue). I. lOJlL 



Intermediate in size between the larger and smaller species of the genus, 

 with the erect setae unusually long and numerous. The clothing is so dense a? 

 to entirely conceal the derm, the prothorax is without fascicles. l)Ut on each 

 elytron the long setae are condensed into three or four loose ones on each inter- 

 stice ; on abrasion the elytra are seen to ha\-e narrow punctures in moderately 

 deep striae, and lo have the fascicles supported by tubercles, but of these the 

 only distinct one on each elytron is the one crowning the summit of the apical 

 ;ilope. 



