Hawirrox.— On Melicerta ringens and Plumatella repens. 801 
a. Asterochiton lecanioides |... UT New Zealand. 
b. Asterochiton aureus a s New Zealand. 
e. Powellia vitreo-radiata  ... Ar . New Zealand. 
d. Powellia doryphora Ea i New Zealand. 
I have also three species of Hymenopterous insects parasitic on Homop- 
tera, and belonging, as I think, to the genera Diapria and Coccophagus. 
DESCRIPTION OF PLATE VII. 
Mytilaspis phymatodidis. 
Fig. 1. Abdomen of female, magn. 200 diams. 
Mytilaspis metrosideri., 
2. Abdomen of female, magn. 200 diams, 
Poliaspis media. 
8. Abdomen of female, magn. 200 di 
4. Antenna of male, magn. 100 diams. 
5. Foot of male, magn. 100 diams. 
Calostoma zealandicum. 
6. Female, upper-side, magn. 2 diams. 
7. Female, under-side, magn. 2 diams 
8. Female, foot, after treatment with potash, magn. 25 diams. 
9, Female, antenna, after treatment with potash, magn. 25 diams. 
10. Female, ovipositor, magn. 200 diams. 
19. Antenna of young insect, magn. 60 diams. 
18. Leg of young insect, magn. 60 diams. 
Eriococcus hoheria. 
14. Young insect, magn. 60 diams. 
15. Antenna of young insect, magn. 200 diams. 
16. Foot of young insect, magn. 200 diams. 
17. Female, magn. 25 diams. 
18. Antenna ef female, magn. 200 diams. 
19. Foot of female, magn. 200 diams. 
20. Anal tubercles of female, magn. 90 diams. 
Art. XXX VIII.—On Melicerta ringens and Plumatella repens 
By A. Hawinrow. 
Read before the Wellington Philosophical Society, 22nd November, 1879.) 
Have recently (September, 1879) had occasion to gather a few specimens 
of Myriophyllum from a swamp in the Petane valley, near Napier, I came 
across several interesting organisms, which I propose bringing under your 
