TEICHALTJS. 67 



strongly punctured ; the surface divided into seven areolets, but the 

 lateral ridges scarcely join the mesial lanceolate areolet. 



This species must not be confounded with Trichalus acutangulus, 

 which it closely resembles ; but that species has the thorax less 

 narrowed in front, and the scutellum is formed in the ordinary 

 manner. 



TRICHALUS. 



Waterk, Trans. But. Soc, 1877, p. 82. 



The species of this genus resemble those of Metriorrhynchus, but 

 have only a single discoidal lanceolate areolet to the thorax, and the 

 elytra have the first coeta divided into three at the base ; or, in other 

 words, they have nine costse, the first and third being abbreviated 

 and united to the second not far from the base, so that there are 

 only seven cost?e posteriorly. 



Trichalus flavopictus. 



(Plate XVI. fig. 11.) 



Waterh., Trans. Ent. Soc, 1877, p. 82, pi. ii. figs. 92-96. 



Niger ; thorace ochraceo, utrinque biimpresso, disco areola lan- 

 ceolata, in imo nigra, bene impresso ; scutello nigro ; elytris postice 

 paulo ampliato, ochraceis, apice nigris, septemcostatis, costis alternis 

 minus elevatis, costc\ juxta suturam basi trifida, interstitiis reticulato- 

 punctatis ; coxis femorumque basi flavis. Long. 3g-G| lin. 



Hab. Port Bowen. 



cJ . Antennse long and broad, third to tenth joints gradually be- 

 coming shorter. Thorax reflexed at the sides : the disk raised, and 

 with a deep longitudinal fovea, joined to the front margin by a 

 carina. The penultimate segment of the abdomen is notched in the 

 middle. 



2 . Antennae less strongly dentate. Thorax straighter at the sides. 

 Elytra a little more parallel. Abdomen simple. 



Trichalus ampliatus. 



(Plate XVI. fig. 7.) 



Waterh., Trans. Ent. Soc, 1877, p. 83, pi. ii. figs. 97-101. 



Niger ; thoracis lateribus elytristiue rufis ; rostro brevissimo ; 

 antennis sat longis ; thorace lateribus modice reflexis, medio nitido, 

 disco impressione baud profunda instructo ; elytris postice paulo 

 ampliatis, septemcostatis, costis alternis minus elevatis, eosta juxta 

 suturam basi trifida. J , $ . Long. 4|-6 lin. 



Hab. E. Australia, Moreton Bay. 



Antennae rather long and stout, not much diminishing in width 

 towards the apex. Thorax with the central part black and shining, 



F 'J 



