GENUS CERAPTERUS OF SWEDERUS. 503 



Subgen. III. — Arthropterus, MacLeay. 



Caput thorace hand angustius : thorax suhquadratus : antennce 

 suhlatce, articulo ultimo mediocri : elytra angusta, ahdomine 

 breviora : tihice apice bispinost^ :^ arigulo externo acutissimo. 



Habitat New Holland. 



Sp. 4\. A. MacLeaii, Do7iov. A. rufo-brunneus : thorace sub- 

 convexo postice a77gtistiore, atigtilis anticis rotundatis : disco 

 medio vix canaliculato. 



A. MacLeaii, MacLeay op. cit. p. 75. 



Subgen. IV. — Phymatopterus, Westwood. 



Depressiusculus : caput thorace angustius : thorax cordato-trun- 

 catus medio longitudinaliter impressus : antennce latce : 

 elytra oblongo-quadrata angulo externo apicali tuberculo 

 munita : tibice latce, interne spinis duabus armatce angulo- 

 que externo rotundato : tarsi distincte 5-articulati. 



Habitat New Holland. 



Sp. 5. P. piceus. Piceus nitidus, antennis pedibusque rufo- 

 piceis, punctis minutissimis irregularibus. (Long. corp. 

 lin. 5.) 



Syn. Cerapterus MacLeaii, Westui. in Trans. Ent. Soc. 



Vol. ILp.95.pl. X.%. 17. 



In the collections of Messrs. Gory*^ and J. Curtis. 



Mr. MacLeay states that his brother had recently captured 

 Cerapterus MacLeaii in the nests of ants ; and moreover 

 remarks, that when alive they had the power of exploding, after 



'' Mr. MacLeay employs the term " bispinose," by which I presume we are to 

 infer that the tibisehave one internal spur and one external spine — at least they 

 are so represented in the figure of A. MacLeaii; but the figure of the leg of 

 C. Smithii has also one spur and one external spine, and yet it is described as 

 " having only one spine at the extremity of the tibia." 



■^ In addition to M. Gory's specimen, Donovan notices that another species of 

 Cerapterus was communicated by M. Fichtel to the Royal Museum of Vienna, 

 making at least two specimens of the genus in continental collections. It is pos- 

 sible, however, that the insect mentioned by Donovan may be that described by 

 KoUar under the name of Paussus hifasciaius. (See Trans. Ent. Soc. Vol. II. 

 p. 90.) The singular structure of the antennae of this species will probably 

 render the establishment of another subgenus requisite. 



