226 Transactions. — Zoology. 



which was it Hkely to have come. Whether it is a new species, or identical 

 with one in Europe, it seems prohable that it has not been introduced here 

 first in the out-of-the-way locaHty where I found it. 



Planchonia would seem to link the Lecanidse to the Coccidge even better 

 than Kermes. 



2nd Subsection. — Monophlebid^. 

 (Trans., vol. xii., p. 294). 



Antemise of eleven joints in the adult female. 



1st Genus, leery a, Signoret. 

 (Trans., vol. xi., p. 220). 



Mr. Comstock informs me that a speci"es, which he takes to be my Icerya 

 purchasi (Trans., vol. xi., p. 221), is committing great ravages in California, 

 on limes, oranges, etc., and he has some suspicion that it arrived there from 

 Australia. This, I think, is not at all unlikely. In describing the species 

 in 1878 I mentioned that it had only lately appeared in Auckland, and I 

 found it on an Australian plant, the kangaroo acacia. When in Austraha 

 a few months ago, I observed at Ballaarat an insect certainly an Icerya, but 

 I think not I. purchasi : but I had no opportunity of bringing away a single 

 specimen. As mentioned in my first paper, the Mauritian Icerya differs in 

 some particulars from ours : probably also in Australia the genus may have 

 several representatives, of' which one has travelled to California and New 

 Zealand.* 



2nd Genus, Ccslostoma, mihi. 



Coelostoma zealandicuni, mihi. 



(Trans., vol. xii., p. 294.) 



The young insect, adult female and adult male of this species, is 

 correctly described in my paper in vol. xii. ; but the second stage of the 

 female is incorrect. At p. 297 of that volume I mention that Colostoma 

 was found at Lyttelton " interspersed with another curious Coccid :" this 

 other turns out to be the second stage of the female Ccelostoma. If, however, 

 I had not actually extracted a fuUgrown Ccelostoma from this stage, seen it, 

 that is, actually emerge, I should not have imagined the possibility that the 

 two were really one and the same insect at different ages, so much do they 

 differ from each other. 



In the second stage, the female is torpid, stationary, enclosed in a solid, 

 hard, round test or shell of thick yellow wax. Some of these tests (fig. 23), 

 attain the size of a large pea ; they are very strong and thick ; the wax is 

 not soluble in alcohol. Often from an orifice at one end a long white seta 



* Since writing this paper I have received from Dr. Hector specimens of I. purchasi 

 from Napier. It had evidently travelled thither either from Auckland or Australia. It 

 was greatly damaging Acacia, decurrem. 



