472 A REVISION OF THE STAPHYLIKID^ OF AUSTRALIA, 



Tribe 1, XANTHOLININA. 



Antennte inserted near the middle of the anterior margin of 

 the front, near together. Prothorax with the lateral margin 

 double ; the prothoracic stigmata uncovered. 



30. DiocHUS. 



Erichvson, Gen. Staph, p. 300 (1840) ; Lacordaire, Gen. Col. 11. 

 p. 65. 



Mentum very broad. Ligula membranous, short, rounded 

 and slightly emarginate in front. Paraglossae distinct. Maxillary 

 palpi with the Ist and 3rd joints nearly equal, the last joint 

 subulate. Labial palpi with the 2nd joint a little shorter than 

 the 1st, the terminal joint very small and subulate. Maxillte with 

 the inner lobe ciliated internally ; the external lobe ciliated at its 

 extremity. Mandibles very short. Labrum small, transverse, 

 sinuate in front. Head elongate, narrowed anteriorly, connected 

 with the prothorax by a very slender neck. Eyes small, rounded. 

 Antennfe short, very robust, straight, 1st joint a little larger than 

 the others, 2nd and 3rd joints sub-equal, obconical, 4th to 10th 

 transverse. Prothorax with the angles rounded. Elytra truncate 

 behind. Abdomen parallel-sided. Legs short ; intermediate coxse 

 near together ; tibi?e finely spined ; anterior tarsi slightly dilated, 

 the 1st joint longer than the others. 



A widely distributed genus. 



113. DiOCHUS OCTAVII. 



Diochus Octavii, Fauvel, Ann. Mus. Genov. X. p. 235 (1877). 



Niger, nitidus, antennis brunneo-piceis, articulis 3 ultimis 

 palpisque testaceis ; segmenti 6 \ margine pedibusque obscure 

 I'ufis ; antennis elongatis, articulis 3-5 parum decrescentibus, 6-9 

 subaequalibus, 11? elongato, acuminato ; capite elongato, ovali, 

 tertia parte mandibulis exceptis longiore quam latiore, lateribus 

 parallelis, postice omnino rotundato, punctis 3 utrinque disco, tertio 

 postico remoto, punctisque aliis parce lateribus basique notato ; 



