MaskELL.—On New Zealand Coccide. 135 
partly because it has, he says, seven-jointed antenne. I am unable to 
agree with him : at least, after examination of many specimens I can only 
detect six, though certainly one of them sometimes appears double. In 
Eriococcus hoheria, mihi, there is no room for doubt. But this character of 
the antenne is, as Mr. Comstock admits, most uncertain. It will be seen 
below that the two insects which I propose to place under Rhizococcus have 
less than seven joints in the antenne. 
Genus Rhizococcus, Signoret. 
M. Signoret and Mr. Comstock agree in attributing to this genus the 
distinctions of—1st, seven-jointed antenne; and 2nd, absence of cottony 
sac, at least until gestation. ‘I am doubtful how far either of these may be 
really sufficient: but probably the second may be admitted: the first is of 
no value. I think, with Mr. Comstock himself (Ann. Report of the Dep. 
of Agric., 1880, p. 839, note), that it would be best to include all under 
Eriococcus. 
1. Rhizococcus celmisie, sp. nov. 
Figs. 88-35. 
Female (fig. 83) deep red in colour, of oval outline, convex above and 
flattened below ; length about ¿y inch. The segments of the body are not 
very distinct. The abdomen ends in two large and conspicuous anal 
tubercles, each of which bears one strong and fairly long terminal seta and 
three other spines (fig. 84). The anal ring has eight hairs. Antenne 
(fig. 85) of six joints, sometimes looking like seven. Mentum doubtfully 
di-merous. The four digitules of the foot are long fine hairs. The tibia is 
a little shorter than the tarsus (a character exceptional in an adult insect, 
occurring only in this genus and Acanthococcus). The trochanter bears one 
long hair and two short ones. A few large conical spines (spinnerets) are 
scattered over the body, and a row of smaller ones, like hairs with tuber- 
cular bases, runs transversely on each segment: also some circular spinne- 
rets. At the edge of the body, all round, is a row of the large conical 
spines, which are set in groups of three on the posterior segments, of four 
or five on the median segments, and almost continuous on the head. When 
the insect is alive these spines are often agglutinated with cottony secretion 
so as to give the appearance of ‘a short fringe. The four spiracles are 
somewhat large and circular. 
On Celmisia, sp., from the Southern Alps. 
I have only one stage of this insect, the adult female before gestation, 
and cannot say precisely what sort of sac, if any, it forms. Rut this would 
be probably normal. The insect differs from the European R. gnidii in © 
size, colour, and habitat, in the digitules of the foot, and in the grouping of 
the conical spines of the edge, which are only in pairs in R. gnidüi, 
