584 REVISION OF THE AMYCTERID^, 



segments short, depressed along anterior margin; fifth shallovvly 

 excavate, the limits of the excavation not well defined but extend- 

 ing to the anterior margin of the segment for some distance on 

 either side of the middle line; preanal fossa in the form of a 

 parallel-sided sulcus, deepest in the middle, running the whole 

 length of the posterior border, and separated from the excavation 

 by a definite ridge; no fascicles present. Forceps hidden except 

 the apices, which are rounded and with short fringe of bristles 

 on the inner surface. Penis blunt, almost truncate. Legs 

 moderately long; anterior tibise with the lower end bent sharply 

 inwards, almost at right angles. Dimensions : (J, 19 x 8 mm. 



Hah. — South Australia, Eucla — West Australia, Eyre (C. 

 French), 



A remarkable species lying on the border line between Psali 

 dura and Talaurinus. In general appearance close to T 

 Riverince Macl., but more nearly allied to P. ahnormis Macl., in 

 the form of the metasternum, and in the forceps. The form of 

 the anal excavation, however, is very similar to that in T. 

 Eiverince, and that species may have to remain, where Lea* has 

 placed it, in Psalidura. On dissecting the specimen before me, 

 as far as possible, the existence of a vertical plate between the 

 ends of the forceps was disclosed. 



Postscript {cidded Xovemher 29th, 1909). — While the foregoing 

 paper has been passing through the press, I have been able to 

 obtain a translation of the second part of Dohrn's paper, which 

 throws light on some of the more obscure species, I should like, 

 therefore, to add the following notes : — 



P. decipiens Dohrn. — This species should, from Dohrn's 

 description, be a member of the P,-/o7'Jiculata-gro\xp. It has the 

 abdominal fascicles close together (1 mm.), but may be distin- 

 guisiied by its smaller size (12-13 mm.) and apparently coarser 

 elytral sculpture. 



P. mirahilis Kirby. — Dohrn has shown that the species hitherto 

 regarded as P. mirabilis can no longer be so; and he has named 



* Trans. Roy. Soc. South Australia, xxviii., 1904. p. HI 



