BY THE REV. T. BLACKBURN. 1219 



[Section I.] — Species with the labrum entirely and con- 

 siderably below the plane of the clypeus, 

 the clypeus itself being evenly reflexed all 

 round its free margin, and at most feebly 

 emarginate. 



A. Antennse 8-jointed.. Group I. 



B. Antennse 9-jointed Group 11. 



[Section II.] — Species having the labrum much 

 exposed to view from above 

 (through profound emargina- 

 tion of the clypeus or other 

 causes) but not rising above 

 the level of the clypeus Group III. 



[Section III.] — Species having the clypeus more 

 or less overtopped by the 

 labrum. 



A. Antennae 8-jointed. 



a. Claws bifid Group IV. 



b. Claws appendiculate ,, Group V. 



B. Antennse 9-jointed. 



a. Claws bifid , Group VI. 



b. Claws appendiculate Group VII. 



CxROUP I. 



Here I have to remark that in the " Revision " (Proc. L.S. 

 N.S.W. 1888, pp. 1332-40) I omitted to state categorically that 

 the anterior tibiae of all the species (except brevicoUis, Blackb., 

 and rufopiceus, Macl.) known to me as belonging to this group 

 have three well-defined teeth externally. 



I have also to describe two new species recently received by me. 



