Masxett.—On Zealand Coccide. 223 
I obtained my specimens from the rata tree (Metrosideros) at Milford 
Sound. Being in the Sound only a few hours on my way from Melbourne, 
I was unable to make as full a collection as I should wish, nor could I find 
a male, 
Lecanochiton is the only genus of Lecanide, as far as I know, which 
makes use of the pellicle of its second stage. In the Diaspide the pellicles 
always form part of the test. This new genus supplies an extra link 
between the two groups, as the genus Kermes, where the young insect has 
the anal tubercles whilst the adult has the abdominal lobes, is the link 
between the groups Lecanide and Coccide. As mentioned by me (Trans. 
vol. xii., p. 291) there is a very close gradation between all the genera of 
the Homoptera, at least as far as concerns the Monomera. 
3rd Group.—COCCIDA, 
(Trans., vol. xi., p. 216.) 
Ist Subsection.—Lxcano-coccip%, sec. nov. 
Insect possessing the anal tubercles of Coccus in all stages ; covered by a 
test; mentum monomerous. 
As observed in my first paper (Trans., vol. xi., p. 217), the general 
characteristics of the group Coccide are, a pair of anal tubercles, and a 
mentum bi- or tri-articulate. I have, however, lately met one of those 
puzzling forms which possess characters apparently of two groups. The 
articulations of the mentum are in most cases very difficult of detection ; 
and, as it seems to me, the only sure guide to the grouping of a species is 
the presence of anal tubercles (in which case it is a Coccid), or of abdominal 
lobes (in which case it is a Lecanid). As a rule, a Lecanid has not more 
than eight, and almost always seven, joints in the antenne. But in cases 
where, as in the following species, the antenne are lost in the adult stage, 
this can clearly not be made a guide. 
In the genus Kermes the young insect has the anal tubercles of Coccus, 
the adult the abdominal lobes of Lecanium: and this genus has been, in 
late works on the Homoptera, considered as a link between the two groups 
on that account. The insect which I have to describe has the anal tubercles 
in all stages, and if the mentum were not uni-articulate I should have placed 
it amongst the group Coccide, in the subsection Coccide proper. As it is, 
Tam compelled to create a new subsection for it. 
Genus Planchonia, Signoret. 
Insect enclosed in a hard, smooth, test, completely surrounding it; test 
Convex above, flat below. Adult female apodous. Anal tubercles present 
in all stages. Test surrounded by long fringe. 
M. Signoret, following Professor Targioni-Tozzetti, includes the genus 
Planchonia amongst the Lecanio-diaspide, but himself remarks that on 
