137 



cribed sex of the latter (as the size and the antennal structure of 

 the one sex are really the only distinctive characters mentioned 

 in the description of that species), the size of which, however — ^ 

 said to be less than half a line — seems to point to distinctness, 

 and moreover I have another species (mentioned below) which 

 agrees much better with the description. 

 In flood debris near Adelaide. 



C. Kreusleri, King. In flood debris of the Torrens I have taken 

 both sexes of a Ctenistes, which I believe to be this species. The 

 distinction between the sexes seems very slight except in respect 

 of the antennae. The sex that I take to be the male has the 

 apical four joints of the antennae together equal to the basal seven 

 together, and forming a distinct club in which joints eight-ten are 

 somewhat equal in length, and gradually increase in width, joint 

 eleven being wider still, slightly longer than nine and ten 

 together, and obtusely narrowed at the apex ; the second ventral 

 segment is scarcely longer than the following segments together, 

 and bears an obscure imj^ression slightly in front of its apical 

 margin. In the other sex the apical four joints together of the 

 antenna? are considerably shorter than the basal seven together, 

 and are successively thickened, joint 8 being same length as> 

 9, 10 scarcely shorter than the preceding two together, 

 1 1 scarcely shorter than the preceding three together ; and 

 the second ventral segment is decidedly longer than the following 

 segments together and has no impression. The whole insect is 

 of a very uniform pale castaneous colour, it is closely and rather 

 coarsely asperate-punctulate, and somewhat closely clothed with 

 short, crisp, whitish hairs. The prothoracic fovea appears some- 

 what forked in front. The antenna? are short (reaching back to 

 about the middle of the elytra), and the eyes are much smaller 

 than in C. Adelaides. 



C. tenebricosus, sp. nov. (? female). ? Brunneo-niger ; antennis 



sat brevibus ; prothorace antics angustato, postice fovea 



magna impresso ; elytris prothorace dimidio longioribus ; 



oculis sat parvis. Long., f 1. (vix). 



This species differs from all yet described as Australian of the 



genus, by its uniform blackish colour. It is more flnely and 



sparsely punctured than C. Kreusleri (?), and therefore more 



nitid ; like that species it is clothed with short, crisp, whitish 



hairs. The prothorax is scarcely so long as wide, with a deep 



posterior fovea not at all forked in front, the general surface of 



the segment being even. The elytra are considerably narrower 



at the shoulders than behind. The antenna? scarcely differ in 



structure from those of the specimen which I regard as the 



female of C. Kreusleri. 



Port Lincoln ; in moss, 



K 



