BY T. G. SLOAN E. 603 



with median part prominent (in cT strongly, in 9 ^ig^itly). 

 Elytra with interstices finely punctate, odd ones biseriately, 

 even ones more closely and irregularly. Posterior trochanters 

 pointed at apex. Ligula depressed, wide, obtuse at tip. Sub- 

 mentum in cT armed with an erect horn, bifid at apex. Length 

 31-35, breadth 11-11-5 mm. 



//^^6.— Queensland : Townsville (Dodd), Port Denison 

 (Masters). 



Var. 2jrominens. cf. Head larger; mandibles longer and 

 more strongly curved ; submentum with a very short bituber- 

 culate prominence ; prothorax wider, sides lightly arcuate to 

 base (in G. (jrande, subsinuate), base wider, more strongly 

 bordered. Length 35 mm. 



Hah. — Queensland: Coen (Hacker). A single specimen 

 (cf) in Coll. Carter. 



The nocte-gvowp. 

 Ligula punctate, depressed in middle of disc ; paraglossse 

 corneous. Maxillae with inner lobe moderately setose on upper 

 side, triangularly prominent at middle of inner side. Palpi 

 long; penultimate joint of labial long, bowed, apical joint 

 very short; penultimate joint of maxillary longer than apical. 

 Prothorax with disc nitid, and more or less without punctures 

 in middle. Mandibles in cT long? sometimes right mandible 

 notched near apex (e.g., G. bostocki). 



GiGADEMA OBSCURUM. U.Sp. 



Head with postocular part of orbits swollen beneath eyes ; 

 ligula depressed ; labial palpi with penultimate joint bowed, 

 more than twice the length of apical joint, this short ; pro- 

 thorax cordate, anterior margin a little more prominent above 

 head than at anterior angles ; elytra with interstices biseriately 

 punctate near base, closely and more confusedly punctate 

 towards apex. 



cf . Head not large (5-5 mm. across eyes), punctate on ver- 

 tex ; eyes prominent ; orbits swollen behind and below eyes ; 

 submentum not armed ; maxilla with cardo not prominent. 



