197 



its sides then become parallel and the posterior angles are suh- 

 dentif orm ; there is a scarcely noticeable impression on the front 

 part of the thorax and a well marked one in front of the base. 

 This latter consists of a short parallel-sided fossa, which is a 

 little longer than wide and is not limited either before or be- 

 hind by a definite line. In some examples the middle part of 

 the fossa is scarcely depressed, so that the appearance is that 

 of two short, parallel, longitudinal striae. The sculpture of 

 the elytra is exceedingly similar to that in B. variabilis ; the 

 elytra, however, are evenly glossy, the stride are impunctate, 

 and the interstices are punctate. The elytra are evenly 

 rounded at the apex as in most other species of the genus. 

 The widely-dilated tibife furnish the most striking character of 

 this insect, by which it may be at once distinguished from all 

 other species known to me ; the antennae also are exceptionally 

 short and thick. This latter character probably differentiates 

 it from B. illusus also — but however that may be, Mr. Pascoe 

 (who appears to have examined the original type of B. illusus) 

 states that that insect has .a "deeply-impressed crescent- 

 shaped mark " on the posterior part of its disc, and seems to 

 speak of it as a decidedly larger species than B. tibialis. 



I have taken this species in South Australia (Pert Lincoln) ; 

 also in Western Victoria. 



B. cosfatus, sp. nov. Xitidus ; piceo-rufus, elytris (sutura 

 infuscata excepta) dilutioribus ; prothoracis postice angus- 

 tati disco late concave, spatio concave postice in medio 

 elevate, lateribus subrectis ; elytris costatis, hand evidenter 

 striatis, obsolete seriatim punctulatis, costis angustis. 

 Long. H— If 1. 



The colouring of the elytra (chestnut, with a dark sutural 

 stripe), which seems to be constant, will distinguish this 

 species from all its Australian congeners, having the disc of 

 the thorax similarly sculptured, except vitfatus, Xewm., which 

 has the elytra quite differently sculptured. 



Thorax about as long as wide, widest in front, thence gradu- 

 ally narrowed to the base, sides nearly straight, obsoletely 

 angulated about the middle ; front margin strongly elevated 

 and produced in the middle, anterior angles somewhat promi- 

 nent, hind angles obtuse and well defined, surface coarsely 

 punctured with oblong punctures tending to longitudinal rows, 

 disc occupied by a very wide depression which commences and 

 is at its deepest a little behind the anterior margin, from the 

 base a nearly impunctate space not depressed below the general 

 level of the surface (and so elevated above the floor of the 

 depression) runs up the depression to about the centre of the 

 thorax. The sculpture of the elytra (which are of ordinary form 



