Maskell. — On Coccididse. 247 



Koebele, who has sent me several specimens (and to whom I 

 dedicate the species with great pleasure), tells me that he 

 found the insect only on that tree, at Sydney and Brisbane, 

 and not in great numbers. 



I believe this to be a distinct species, although evidently 

 closely allied to I. purchasi. The difference of size is not of any 

 importance, though the dimensions in every case observed are 

 as given above, and are much less than those of I. purchasi. But 

 the dorsal pencil and the ten-jointed antenna, and the very 

 small ovisac of the adult female, are clearly important distinc- 

 tions. I cannot say that the larva and the male exhibit any 

 special differences except size and the colour of the cotton, 

 but the second-stage female differs in the antenna. None of 

 the other known Iccrycc is at all like it, except that some 

 specimens of I. montserratensis, Eiley and Howard (" Insect 

 Life," vol. hi., p. 99), exhibited ten joints in the female an- 

 tenna. This character was constant in all the specimens 

 (nine) of I. koebelci which I examined. The formation of 

 the dorsal column of cotton is not clear to me ; as mentioned 

 above, I have failed to find any special organs, or even any 

 orifice or group of orifices, which might be taken as its source ; 

 perhaps somebody else may be more fortunate. 



The species of Icerya now known to science are as 

 follows : — 



I. seychellarum, Westwood, 1855 (= I. sacchari, Guerin, 

 1867) ; Mauritius, on sugar-cane. 



I. purchasi, Maskell, 1878 ; originally Australia, now many 

 countries, on almost everything. 



I. cegyptiaca, Douglas, 1890 ; Egypt, on Ficus. 



I. montserratcnsis, Kiley and Howard, 1890; Montserrat, 

 West Indies, on various plants. 



I. palmcri, Eiley and Howard, 1890 ; Mexico, on grape- 

 vine. Only the larva and second stage observed. 



I. roses, Eiley and Howard, 1890 ; Key West, Florida, on 

 rose. 



I. koebelci, Maskell, 1892 ; Australia, on Leptospermum 

 Icevigatum. 



There is no reason for thinking that this new species of the 

 genus will be as mischievous as I. purchasi, although, indeed, 

 the latter is less troublesome perhaps in its native country 

 than it has been in the others to which it has migrated. 



Group BEACHYSCELID^], Schrader. 

 Genus Cabtebia, Signoret. 

 Carteria decorella, sp. nov. Elate XVIII., figs. 12-20. 



Adult female covered by a waxy test, which, at first single 

 and separate, becomes later on aggregated in masses on the 



