3:î2 



with rows of more or less conical tubercles. on the third becoining 

 subcariiiate at base. Two apical segmenta of abdomen with a dépres- 

 sion on each side. Front tibia3 very l'eeblycurved.— Length 25 mil!. 

 Hab. : Probably N. Auslralia. 



I previously(l)stated that the type (and abovedescribed) spécimen 

 was a female. Examination of fresh material, however, bas now 

 convinced me that it is a maie. Other dilVerences between itand 

 tribulus, to those already pointed ont by me in 1903, are the 

 suddenly terminated rostral carinse, and the strong pectoral arma- 

 ture. In tribulus the intermediate carinœ gradually merge into the 

 head and the pectoral armature is decidedly feeble In tribulus also 

 the scrobes are much narrower. The fifth-seventh joints of the 

 funicle at first appear to be slightly transverse, but this is really due 

 to their clothing. Seen from the side the outline from the front of 

 prothorax to about the middle of elytra is almost perfectly flat. On 

 each elytron the largest tubercle of ail is on the third interstice at 

 summit of the posterior declivity. At first sight it appears to be on 

 the suturai interstice but is really not so ; on one elytra there are 

 six tubercles on the third interstice and five on the other, on the 

 seventh there are ten (including an obtuse basai one) on each side, 

 of which the smallest is subapical, the fifth bas the remains of two 

 or three small tubercles on each side. 



Since the above was written, I haveexaminedfive other spécimens 

 from Western Australia, evidently belonging to this species. Of 

 thèse three maies belongs to the Brussels Muséum, another maie 

 belongs to the Macleay Muséum, and the fifth (a female) was given to 

 me by Mr G. French. 



The Macleay Muséum maie was sent to Mr Griffith for comparison 

 with the type oïplanicollis. M. Blackburn to whom it was sliownsaid 

 it (( is probably planicollis, the only différence seems te be that the 

 tubercles of elytra of your spécimen are very much sharper and 

 more curved at tip than in the type, but are in the same relative 

 position ». 



AH four maies difler slightly from each other and from the type, 

 and ail four bave the third interstice carinate on its basai half 

 instead of subcarinate as in the type; the third interstice in ail four 

 spécimens bas three tubercles except that on the left elytron of one 

 spécimen it bas five; the seventh interstice usually bas nine tuber- 

 cles, but thèse vary in number from eight to ten, they also vary 

 considerably in acuteness. 



The female difTers from the maies in being larger (34 mill.) and 

 wider, third interstice carinate to beyond the middle, fifth carinate 



(1) In Trans. Roy. Soc. S. Austr., 1903, p. 106. 



