104 t'^^'^y- 



a long hair on the troclianter, and a hairless coxa, characters of L. 

 hesperidum, and two terminal tarsal hairs, a character of L. lauri. 



The conclusion, therefore, would seem to be either thati. hesperi- 

 dum lives on laurel, ivy, holly, and other plants in New Zealand, whilst 

 L. lauri attacks citrus in Australia (thus reversing the European 

 arrangement), or else the two species are identical. I believe that the 

 latter alternative is correct, and that I was right in 1887 in mentioning 

 only L. hesperidum. 



II. — The genus Peosopophoea, Douglas. 



In the number of this Magazine for August, 1892, p. 207, Mr. 

 Douglas establishes this genus for a species found in Demerara on 

 Dendroihium. I have received from Australia two forms, the one on 

 Acacia, the other on Eucalyptus, which had been for some time rather 

 puzzling to me, as I could not make them fit into any known genus. 

 The publication of Prosopophora came very opportunely to relieve my 

 perplexity, and I propose to place my two species therein. But it is 

 necessary to somewhat extend Mr. Douglas's generic characters, and 

 also to fix others less definitely, for this purpose ; and this, indeed, is 

 necessary, because he has included one which is not really generic, but 

 merely specific, viz., " iSurface with granulose raised lines," and 

 another which does not agree with his figure If, viz., "no anal tu- 

 bercles." As regards the former of these, an external roughness or 

 tessellation of the covering sac or test can clearly not be used as 

 generic, otherwise we should have to be perpetually creating new 

 genera on insufficient grounds. As regards the second, the anal 

 turbercles of Prosopophora dendrohii are clearly (from figs, la and If) 

 at least as conspicuous as in Dactylopius or Planchonia, and, indeed, 

 more so. Again, one of Mr. Douglas's generic characters is — " Legs 

 atrophied." Here I propose to insert the word " usually," because as 

 it stands it would forbid at any future time the inclusion of a species 

 which might be discovered possessing every character of the genus 

 except in having fully formed feet, and I think it would be a pity to 

 erect a new genus only on that difference. 



I venture, therefore, in order to add my two Australian species 

 to Mr. Douglas's genus, to extend and modify some of his generic 

 characters, as shown below. Further, I see no reason why this genus 

 should not be attached to the Sub-Division Acanthococcidce, as it very 

 clearly is not very far removed from Plancho7iia ; indeed, if there 

 were a fringe to the sac I would mei'ge it in that genus. Mr. Douglas 

 does not mention any spinneret-orifices in P. dendrolii, but in both 



