BY T. G. SLOANE. 607 



It is possible that G. longicolle Blkb., is a form of G. bos- 

 torki var. mfer media, but the examination of specimens from 

 Oodnadatta (including the cf) would be required to settle this 

 matter. 



GiGADEMA MANDIBULARE Blackbum. 



Trans. Roy. Soc. S. Aust., xvi., 1892, 18; Var. (1) G. longius 

 Blackburn, op. cit., 1901, 101. 



cT. Piceous-black. Head large; mandibles long, decussate, 

 right notched on inner side before apex. Prothorax cordate 

 (G4 X 10mm.) ; sides sinuate before base; disc nitid, sparsely 

 punctate, except in centre. Elytra strongly striate : interstices 

 biseriately punctate towards base, fourth and sixth wider than 

 others, densely punctate on apical half. Maxillary palpi with 

 penultimate joint longer than apical. Anterior tibiae long; 

 inner notch considerably nearer apex than base. Length 39 

 mm. 



Hah. — Western Australia: Upper Ashburton River. I re- 

 ceived my specimen from Mr. C. French, and have compared 

 it with the type in the South Australian Museum. 



A specimen ( 9 ) in my collection agrees with the description 

 given above, but has the prothorax narrower (6 x 8-6 mm.), 

 more convex ; margins narrower ; disc nitid but more generally 

 covered with punctures ; intermediate tibiae wider at apex, and 

 with external apical angles more strongly dentiform. Length 

 37 mm. 



Hah. — Northern Territory: Tennant's Creek (Field). 



This specimen from Tennant's Creek, I compared with a 

 specimen ( 9 ) in the South Australian Museum (from Central 

 Australia, which is ticketed " Gigadema longius " in the hand- 

 writing of the late Rev. Thos. Blackburn, and I considered it 

 identical. It is, in my opinion, conspecific with G. mandihu- 

 lare (perhaps a variety) ; but the examination of male speci- 

 mens from the MacDonnell Ranges would be necessary to deal 

 with it satisfactorily. 



