SCALE-INSECTS. 95 
having the tibia shorter than the tarsus ;* digitules fine hairs. 
On the dorsal surface are a great number of conical spines, of 
which the largest are arranged in six longitudinal rows; from 
the spines sometimes protrude some cottony tubes with an 
expansion a little below the tip. 
Young larva free, active, elongated-oval, flattish ; spines as 
in adult. 
Adult male orange-red in colour; length, about jin. An- 
tenne of ten joints. Abdominal spike short, thick, with a curved 
appendage. eet normal. 
Habitat—On Rubus australis, Riccarton Bush, Canterbury ; 
on Knightia excelsa, Cyathodes acerosa, Wellington. 
The very numerous conical spines distinguish this species 
from that known as Acanthococcus aceris, Signoret, the European 
species. 
There seems to be no sufficient reason why the genus 
Acanthococcus should have been separated from Eriococcus, and 
they have been here reunited. The only difference mentioned 
by Signoret is the colour and texture of the sac, an unimportant 
character in this case. 
57. Ertococcus patitipus, Maskell. 
NZ. Trans., Vol. XVII., 1884, p. 29. 
(Plate XV., Fig 2.) 
. Sac of adult female yellowish-white, elongated-oval, convex, 
closed at both ends. Length, about din. 
Sac of male unknown. 
Adult female greenish-grey, turning to brown after gesta- 
tion; filling the sac ; shrivellmg at gestation. Anal tubercles 
rather large and conspicuous. Anogenital ring small, with 
eight (sometimes six ?) fine short hairs. Antenne of six joints. 
Feet normal, slender; lower digitules narrow and rather long. 
Body segmented ; segments not very distinct. On the middle of 
each segment a trausverse row of small slender conical spines not 
set closely together. Very many small scattered oval spinneret 
orifices. 
Adult male unknown. 
Habitat—On Myoporum letum (ngaio), Eleocarpus dentatus 
(hinau), &e,; throughout the Islands. 
* Asa rule, a tibia shorter than the tarsus characterizes an insect not yet 
arrived at the adult stage. The genera Hriococcus and Rhizococcus sometimes 
present exceptions to this rule. See also, above, the genus Hriochiton, 
