BY T. G. SLOANE. 597 



GiGADEMA SULCATUM Macleay. 



Eelliio sM/6"rt^/<6- Macleay, Trans. Ent. Soc. N.S.Wales, 1864, 

 i., 108 ; 1 G. parocnsis Castelnau, Trans. Roy. Soc. Victoria, 

 viii., 1868, 106; Gestro, Ann. Mus. Civ. Genova, vii., 1875, 

 877; G. wiiiufa Castelnau, I.e., 107; G. thomsoni Castelnau, 

 i.e., 107; G. dameli Macleay, Trans. Ent. Soc. N.S.Wales, 

 1873, ii., 323. 



Black. Elytra strongly striate ; interstices biseriately punc- 

 tate, convex (particularly towards base), seventh, at least, 

 carinate. Length 20-24, breadth 7-5-9 mm. 



The elytra usually have the interstices from second to 

 seventh biseriately punctate, but sometimes the fourth and 

 sixth are triseriately punctate on the apical part of elytra. 

 One specimen, from Katherine River, has the prothorax nar- 

 rower, more strongly sinuate towards base ; elytra with inter- 

 stices costate towards base, and with the even ones confusedly 

 punctate : these are the distinguishing characters of G. jmro- 

 ensis, as given by Gestro, and this inclines me to believe that 

 G. paroeitsis Cast., is conspecific with G. sulcatum Macl. G. 

 minuta Cast., is represented in the Howitt Collection, where 

 I have seen it, and recognsied it as conspecific with G. sulca- 

 tum. I have seen the types of G. dameli Macl., and could not 

 differentiate it from G. sulcatum. 



Hah. — New South Wales (I have it from Mulwala, Ger- 

 manton, Urana, Junee, Lachlan River, and Bingara) : 

 Qi;eensland (Gayndah, Coomooboolaro, Townsville, Port 

 Denison and Cunnamulla) : Northern Territory (Katherine 

 River) : Western Australia (Onslow). 



GiGADEMA BIORDINATUM, n.Sp. 



Oval. Prothorax with surface wholly punctate (punctures 

 separate, not confused, derm not rugose in centre of disc) ; 

 elytra striate, interstices biseriately punctate, opaque, sum- 

 mits not forming nitid ridges. Black. 



Head wide across eyes (5 mm.), punctate (the punctures 

 separate), longitudinally strigose near eyes; one supraorbital 



