1901.] ATJSTBALIAN SPIDEES. 239 



Subfamily BARYCHELiwiE. 



Group Baetchelb^. 



In this subfamily we find the tarsal scopulse projecting in strong 

 bristly tufts beyond the claws at the end of the foot, and from 

 consequent disuse the third claw has disappeared. Although 

 the members of this group make their home in burrows in 

 the soil which has to be dug out, the rastellum has not been 

 developed into the strong teeth which are so typical in the pre- 

 viously described families ; but in most cases the bristles on the 

 front edge of the mandibles are simply hardened, retaining their 

 bristly form. The spinnerets, as the name of the group implies, 

 are short and stout ; the first joint is longer than the remaining 

 tw^o together, the third shortest and nearly hemispherical. 



The genera of which we have representatives in Australia all fall 

 into the one group of Barychelew, distinguished by the strongly 

 procurved front row of eyes ; the front laterals being brought 

 down to a position on the margin of the clypeus, where they are 

 near together, forming a pattern of which the extreme form is 

 seen in Idiops Perty, the whole group being at least not broader 

 than long. 



Grenus Idiommata Auss. 



Idiommata Auss., E. I. Pocock, Ann. & Mag. Nat. Hist, ser 6 

 vol. xvi. 1895, p. 225. 



Idiommata Auss., Eev. 0. P, Cambridge, Proc. Zool. Soc. Lond. 

 1870, p. 154. 



Idiommata Auss. Verb, zool.-bot. Ges. Wien, 1871, p. 183. 



Idiommata Auss., L. Koch, Arachn. Austr. 1874, p. 474. 



Encyocrypta E. Simon, Ann. Soc. Ent. Er. 1888, p. 247. 



Idiommata Auss., E. Simon, Hist. Nat. d. Araign. vol. i. 1892, 

 p. 121. 



Type, Idiommata blachivalli Cambr. 



In the year 1895 Mr. Pocock, on re-examining Mr. Cambridge's 

 type specimen, discovered (loc. cit.) that (in the male at least, 

 the female not being known to him) Id. hlackivalli is furnished 

 with a Wood-Mason's stridulating organ, which the females, at any 

 rate those in the British Museum, identified as Id. reticulata 

 L. Koch, had not. /. hlackwalli being the type of the genus 

 Idiommata Auss., it is clear that the other species, until proved 

 to have the stridulating organs, cannot be included in the same 

 genus ; and Mr. Pocock therefore re-characterized the genus 

 Encyocrypta Simon, for the non-stridulated species. I record them 

 as such, as it is necessary to obtain and examine more specimens 

 before it can be seen how far the males and females agree re- 

 spectively with those of /. hlacTcwalli. 



