BY T. G. SLOANE. 599 



disc not punctate. Male, with cardo of maxillae triangularly 

 prominent, or gula armed ; mandibles sometimes very long. 



GiGADEMA MAXILLARE, U.Sp. 



G. grande Gestro, Ann. Mus. Civ. Genova, vii., 1875, p. 

 879, fig.l ($). 



Depressed. Head large ; prothorax subrotundate, widest 

 about middle ; apex lightly and widely produced ; sides strong- 

 ly sinuate-angustate to base ; disc smooth, impunctate ; elytra 

 striate, interstices closely punctate (more than two rows of 

 punctures on each). Black. 



cf. Head large (6-8 mm. across eyes), depressed, finely 

 sparsely punctate towards base and sides ; eyes prominent, 

 very lightly enclosed behind ; clypeus smooth, a few fine punc- 

 tures towards sides. Mandibles long, falcate, decussate. Lab- 

 rum large, depressed, rounded at apex ; a setigerous puncture 

 at each anterior angle ; surface Isevigate with a few fine punc- 

 tures. Maxilla with cardo projecting downward in a strong, 

 bent, obtuse, horn-like process. Ligula transversely depressed ; 

 apex wide, truncate. Mentum with a short, wide, excised, 

 median tooth; lobes triangular; submentum unarmed. Pro- 

 thorax broader than long (7-1 x 9 mm.), wide at apex (6-8 

 mm.) ; rounded on sides, roundly ampliate at middle, strongly 

 angustate posteriorly, strongly sinuate a little before base; 

 apex with middle widely and shortly advanced, rounded and 

 less prominent at anterior angles; base narrow (4-1 mm.), 

 strongly bisinuate (rounded in middle), angles marked, obtuse 

 at summit ; median line well marked ; margins lightly punc- 

 tate. Elytra parallel (21x12 mm.), punctate-striate ; punc- 

 tures in striae very small, a little distant from one another ; 

 interstices closely and finely setigero-punctate. Posterior tro- 

 chanters conical, obtuse at apex. 



9. Differs from cf, by cardo of maxilla unarmed; pro- 

 thorax with apex less prominent in middle. 



Length 27-35, breadth 9-12 mm. 



Hah. — Tropical Queensland: Townsville and Kuranda 

 (Dodd), Cooktown (Olive), Princess Charlotte Bay. 



