BY THE REV. T. BLACKBURN. 519 



15 species which seem to me fairly entitled to their position, and 

 described in such fashion as to be at least possibly capable of 

 identification. Eight of these I have identified with more or less 

 confidence, while there are seven which I am quite confident that 

 I have not seen {gagatina, Burm., iridescens, Blanch., scutalis, 

 Blanch., crassiventris, Blanch., Roei, Burm., Gouldi, Hope, and 

 obesa, Boisd.). 



On these I will make the following remarks ; — sciUalis, Blanch., 

 is said to be very close to obesa, Boisd., and to difier from it in 

 being of a uniform ferruginous colour, in its closer puncturation, 

 and "especially" by its scutellum being sulcate down the middle. 

 I have not seen any species of the genus presenting the last named 

 character ; if it could have been an individual peculiarity of the 

 example described, then scutalis, Blanch., might well be obesa, 

 Burm. C. obesa, Boisd., is referred to below. C. gagatina, Burm., 

 is a smaller species than any of its congeners known to me and is 

 said to be of a deep black colour with the head and prothorax 

 opaque. C. iridescens, Blanch., is described as a black species with 

 antennae entirely testaceous, and the pygidium deeply punctulate ; 

 the only iridescent species known to me which could at all 

 be called "black" is 2ndchella, sp.nov., but it has dark antennae 

 and the pygidium (not punctulate but) granulate. C. crassiventris, 

 Blanch., is a very large (long. 16 lines) species f rom W. Australia; 

 I have seen nothing at all like it. C. Roei, Burm., is another large 

 species from Western Australia quite different from anything I 

 have seen. C. Gouldi, Hope, is from the Northern Territory of 

 S. Australia, and besides other differences is very much larger 

 than any species I have seen from Northern localities. 



The external sexual chai-acters so far as I can discover are not 

 strongly mai'ked in the species of this genus. The flabellum of 

 the antennae seems invariably to consist of shorter (and frequently 

 of less numerous) lamellae and the intermediate ventral segments 

 to be usually more convex in the female than in the male. The 

 tarsi are invariably longer in the latter sex than in the former. 

 I cannot find any constant distinction in the outline of the apical 

 ventral segment. 



