632 STUDIES IN AUSTRALIAX ENTOMOLOGY, NO. XII., 



cc. Elytra obscure, legs fuscous P. margint^U n.<i, 'Erichson. 



hb. Prothorax elongate (^ broader than long, after Blackburn), gently 



narrowed to base and apex P. murrayaims, Blkb. 



AAl. Elytra with 8th interstice narrow and convex at apex (size small). 



d. Prothorax hardly narrowed to base, posterior angles obtuse; elytra 



with punctures of 3rd interstice minute. P. queens/ an die us, SI. 



dd. Prothorax transverse, strongly narrowed to base, posterior angles 



marked; elytra with punctures of 3rd interstice large, fovei- 



form P. cooki, SI. 



The following notes deal with the species referred to Platynus 

 in Masters' ' Catalogue,' Part i. (1885), and its ' Supplement,' 

 Part i. (1895), but which have not been included in the fore- 

 ojoing table. 



p. amhiguus, Erichs., is not a member of the genus. Its 

 synonymy is P. amhiguus, Erichs. (1842)= P. lophoides, Chaud. 

 (\Sb4:) = Cyclothorax punctipennis, Macl. (1871). The identity 

 of Cyclothorax punctipennis, Macl., w^ith Platynus amhiguus, 

 Erichs., was published in 1874 b}^ H. A¥. Bates in his paper on 

 the " Geodephagous Coleoptera of New Zealand,"* and the 

 synonymy of P. lophoides, Chaud., with the same species in 1894 

 by me.f 



P. planipennis, Macl., postea, p. 633. 



P. nitidipennis, Macl., is referable, not to Platynus, but to 

 Loxandrus. 1 



Platynus marginellus, Erichson. 



Wiegm. Arch. 1842, i. p. 130: Anchomenus nigro-oineus, Newm.^ 

 The Entomologist, 1842, p. 402. 



I think there can be no doubt but that the Victorian species 

 Anchomenus nigro-ceneus, Newm., (brought from Port Phillip by 

 Mr. Edmund Higgins) is identical with the Tasmanian species 

 Platynus marginelhis, Erichs.; and this is also the opinion of the 

 Rev. Thos. Blackburn.§ 



* Ann. & Mag. Nat. Hist., (4) xiii. (March-April) 1874, p. 12. 

 t These Proceedings, 1894, (2) ix., p. 447. 



1;. Supra, p. 628. 

 § These Proceedings, 1889, (2) iv. p. 740. 



