BY THOMAS G. SLOANE. 481 



oodiformis; all are members of Chaudoir's genus Opryosternus 

 which I merge with Prosopogmus. Arcjutor inedita, Casteln., 

 which Mr. Blackburn has suggested may be a Leptopodus, or a 

 Simodontus, does not appear to me, from the description, to 

 belong to either of these genera. The description, if accurate in 

 ascribing to it two impressions at each side of the prothorax and 

 two punctures on the third interstice of the elytra, indicates that 

 it is likely a Hormocliilus; its cordiform prothorax would exclude 

 it from Simodontus, and the two basal impressions of the pro- 

 thorax from JLeptopodus; it is fairly well described, and could 

 doubtless be identified if specimens from the original locality 

 were before one. 



90. S. AUSTRALIS, Dej. (?) 



A species which seems to be the commonest Simodontus in 

 South West Australia so closely resembles a specimen in my 

 collection from Melbourne, which I regard as *S'. australis, that I 

 cannot separate it; the only difference I can notice is that the 

 basal border of the elytra is slightly more prominent in the 

 Melbourne specimen; it seems certainly the western representative 

 of .S'. australis, and therefore I have placed it under that name- 

 I do not know if it is the species which Mr. Blackburn has 

 described as S. australis, Dej., but most likely it is. The follow- 

 ing is a short description : — 



Oval, subconvex; head moderate; prothorax laevigate, trans- 

 verse ; elytra with third stria hardly narrower than fourth ; 

 prosternum margined on base ; mesosternal episterna punctate, 

 metasternal episterna elongate. Black (or piceous-black), shining; 

 under surface piceous; legs and antennae brownish. 



Head smooth, convex, lightly transversely impressed pos- 

 teriorly; eyes prominent, enclosed at base; prothorax transverse 

 (1*8 X 2 "4 mm.), widest about middle, very lightly narrowed to 

 base, strongly narrowed to apex, depressed on disc; sides lightly 

 rounded; apex deeply emarginate; anterior angles prominent, 

 obtuse; base truncate-emarginate; basal angles rounded; border 

 narrow, reaching nearly to middle on anterior margin and to 

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