12 



With regard to the species described by Gebien, there is 

 nothing in his description to distinguish C . hlackhurni, Geb., 

 from G . interioris, Blkb. ; nor is there any doubt in my mind 

 as to the identity of G. hicolor, Geb., with G. viridicoUis, 

 W. S. MacL, an unusually vividly-coloured and distinct 

 insect. Gebien describes the thorax as ''steel-blue," while 

 Macleay's type, which I have examined, has the thorax a 

 dark rich-green, of a kind that is to be little distinguished 

 from some shades of blue. 



G. tenuicoi^nis, Geb., must be very near G. longulus, 

 Blkb., and obscurus, Blkb. (which may be only a variety of 

 longulus), but its apparently impunctate elytral interstices 

 and some differences in the antennae would appear to dis- 

 tinguish these ; while longulus can only be distinguished from 

 longipennis, Hope (see below), by its slightly differently 

 shaped prothorax and the stronger interstitial punctures of 

 elytra. 



G. rugosus, Germ. =(7. puncticollis, Hope. Germar 

 seems to have considered rugosus as synonymous with sulci- 

 pe?inis, Hope, but Mr. Blair tells me that the last is identical 

 with sutu rails, Pasc, a species whose interstices of elytra are 

 almost impunctate. The size of rugosus, "magnitudine 

 praecedentis" (the disputed cupripennis, Germ.), and the 

 words ''crebre transversim rugulosa" as applied to the elytra 

 point to puncticollis , Hope, rather than to sulcipennis. 



G. longipennis, Hope, was wrongly identified by Black- 

 burn. Mr. Blair writes: "Longipennis agrees with similis 

 in all the differences mentioned [by Blackburn in his descrip- 

 tion of the latter. — h. j. c.]. He was no doubt led astray by 

 Hope's leaving 'Adelaide' as the suggested locality for longi- 

 penne in spite of 'S.R.' on his own label." I therefore pro- 

 pose the name cyaniventris for the Adelaide species described 

 by Blackburn as longijjennis (Proc. Linn. Soc, 1892, p. 456). 

 The specimen sent me, as compared with type of similis, Blkb., 

 and longipennis, Hope, has a black pronotum, as stated by 

 Hope, the same being vari-coloured metallic in cyaniventris, 

 a fact not noted by Blackburn in his description of similis 

 when giving its distinctions from the Adelaide species. 



G. meyricki, Blkb., is apparently only distinguished from 

 G. iridiventris, Blkb., by the presence of a "sat augusto" 

 ocular sulcus in the description, the same said to be "fovei- 

 form" in the table. My specimen of G. meyricki was com- 

 pared with a specimen from the Elder Expedition in the 

 South Australian Museum labelled by Blackburn. The ocular 

 sulcus is scarcely defined, and is unsatisfactory as a dis- 

 tinguishing character in this case. , 



