96 INSECTS NOXIOUS TO AGRICULTURE. 
Allied to E. buvi, Signoret (European), and E. multispinus, 
ante: but different from both in colour, in the arrangement of 
the spines and spinnerets, and in the form of the antenne. 
Genus : RHIZOCOCCUS, Signoret. 
Adult females naked, usually stationary ; body segmented ; 
anal tubercles conspicuous. Antenne of six or seven joints. 
Feet present. Anogenital ring inconspicuous, with fine hairs. 
Male pupa enclosed in a cottony sac. 
Mr. Comstock proposes (Ann. Rept. of Entom., U.S. Agric. 
Dept., 1881, p. 339, note) to include in this genus all the species 
of Hriococcus. The organic difference disclosed by the forma- 
tion of a sac in that genus and the absence of a sac in 
Rhizococcus seems to render the separation of the two necessary. 
58. Rurzococcus cutmist®, Maskell. 
NZ Tronss Viol. XVES Uses sp; iso. 
(Plate XVI., Fig 1.) 
Adult female deep red in colour, elongated - oval, convex 
above and flattened below ; length about 5/;in. 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. 
The anal ring has eight hairs. Antenne of six joints, some- 
times looking like seven. Mentum doubtfully dimerous. The 
four digitules of the foot are long fine hairs. The tibia is a little 
shorter than the tarsus.* 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 tubercular bases, runs transversely on each segment; also 
some circular spinnerets. 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. 
Adult male unknown. 
Habitat—On Celmisia sp., Southern Alps, Canterbury. 
* See note, above, under Hrioeoccis multisprirs. 
