BY T. G. SLOANE. 605 



GiGADEMA NOCTE Newman. 



J^nigma norte Newman, The Entomol. 1842, 413 ; Schaum, 

 Berl. Ent. Zeit, 1863, 80: Glfjddeind titanuni Thomson, Arc. 

 Ent., 1859, 92: G. norte, Gestro, Ann. Mus. Civ. Genova, 

 1875, vii., 878. 



Right mandible in cT not notched on inner side before apex ; 

 elytra with interstices 2-7 biseriately punctate near base ; 

 punctures more confused towards apex. 



Var. fypica. Punctures of elytral interstices tending to be 

 biseriate, slightly more confused towards apex. Length 30-38 

 mm. 



Tlab. — New South Wales: Germanton, Urana, Grenfell, 

 and Cobar. 



Var. tit ana Thomson. Punctures of elytral interstices more 

 dense, biseriate only near base. Length 36-47 mm. 



Hah. — Queensland: Rockhampton and Cooktown. 



I place, under G. nocte Newm., all the specimens known to 

 me (a large series) with the second, fourth, and sixth inter- 

 stices of the elytra confusedly punctate towards apex ; labial 

 palpi with penultimate joint bowed ; right mandible not 

 notched near apex in cf. 



GiGADEMA BOSTOCKi Castelnau. 



Trans. Roy. Soc. Victoria, viii., 1868, 106; Gestro, Ann. 

 Mus. Civ. Genova, vii., 1875, 876: G. eremita Blackburn, 

 Trans. Roy. Soc. S. Aust., xvi., 1892, 17 : G. intermedium 

 var. Gestro, op. cit.., vii., 1875, 877. 



Black, shining. Prothorax cordate ; anterior angles round- 

 ed, usually more prominent than middle of anterior margin ; 

 sides sinuate or subsinuate before base. Elytra with inter- 

 stices biseriately punctate. Right mandible in cT notched be- 

 fore apex. Length 32-40 mm. 



Hab. — Western Australia: Cunderdin, Wanneroo, Cham- 

 pion Bay, Cue, Onslow, Kimberley District. 



G. bostocki Cast., is a species with a wide range, and is sub- 

 ject to some variation in the shape of the prothorax. I con- 



