502 Mr. Gilbert J. Arrow on Characters and Relationships 



Southern Patagonia. It appears that this curious group 

 of beetles ranges over a much larger area of South 

 America and perhaps contains many species. Two or 

 three have been already described and placed in different 

 genera of Dynastinae, a group to which, as I pointed out, 

 they have a superficial resemblance. It will be useful to 

 bring together the references, which are as follows — 



Genus Idiostoma, Arrow, Trans. Ent. Soc, Lond., 1904, 

 p. 740. 



Landhechi, Phil. {Orydes), Stett. Ent. Zeit., 1878, p. 309, 

 PL II, fig. 2 ; Anal. Univ. Santiago, 1887. Chili. 



syn. Faulscni, Fairm. (Phyllognathus), Bull. Soc. Ent. 

 France, 1885, p. 189. 



Medon, Arrow, I.e. p. 741. Patagonia. 



rufum, Arrow, /. e. S.W. Patagonia. 



simplicifi'ons, Fairm. (Phyllognathus), I. c. Peru. 



The two species of Fairmaire are very inadequately 

 described, but M. Germain has stated that /. Paulseni. 

 Fairm., and /. Landhechi, Phil., are identical, and that they 

 belong to a new genus of Orphnidac. I have not seen 

 M. Germain's paper, owing to the Chilian periodical not 

 reaching this country, but my friend Dr. Ohaus has kindly 

 given me this inforniation and has also sent me for com- 

 parison with our specimens an example of /. Landbecki 

 found by himself at San Isidro, Chili. It closely resembles 

 /. rufum, but is rather more elongate and much less 

 strongly punctured, while the maxillae have distinct inner 

 and outer lobes, the inner one very short and both fleshy 

 and unarmed. 



Sub-family. —A CLOPINAE. 



Only two genera of this peculiar group are known, 

 Aclopus, containing two South American species, and 

 Phaenognatha, containing one species from North Australia, 

 to which Dr. Heller has recently added another from 

 Argentina. This is not very similar superficially, but is 

 so close in all essential points that, although a genus 

 might well have been made for it, there is no incongruity 

 in the course which Dr. Heller has preferred, while the in- 

 teresting geographical distribution of these forms, supply- 

 ing another instance of the special relationship of the 

 Australian to the South American fauna, is emphasized. 



