49 
shorter than 5, subequal, narrower in proportion to their breadth than 
in aurantii] 8 about as long as 4; 2 nearly as long as 4. 
Pulvinaria tecta Maskell. 
A. word seems necessary as to this species, since it has been found on 
orange in Australia. It differs from P. aurantii in occurring in masses 
on the twigs, the females almost smothered in the cotton ; in the antenna 1 , 
especially in the short second joint; also in the filiform digitules of the 
claw. These particulars are gathered from Maskell's description; I 
have not seen tecta myself. The marginal spines of P. tecta, as figured 
by Maskell, resemble those of aurantii. 
Genus SPH^ROCOCCUS. 
PSEUDOLECANIUM new subgenus. 
Adult female more or less oval, lecanium-like, living exposed on plant 
or more or less protected by the sheathing bases of leaves; not visibly 
segmented in adult; antenna? and legs wanting; margin with capitate 
spines; larva excessively elongated. 
Sphaerococcus (Pseudolecanium) tokionis n. sp. 
Adult female, simply a sac containing larva? ; irregular, more or less 
oval, about 6 mm. long, dark brown, shiny. Living on twigs and pro- 
ducing a little cottony matter. 
I did not succeed in finding legs or antenna?, and believe them to be 
absent. Margin with capitate spines, shaped like little Agarics. 
(Spines such as these occur also in Ceroplastes.) 
As in Kermes, which the insect in many ways suggests, the larva 
affords the best characters. It is very curious that while the adult 
female is so excessively degenerate, the very young larva' which pack 
her body full exhibit more differentiation of parts than is usual in coccid 
larvae. The larval antenna 1 , for example, are like those of an adult 
coccid, and very different from those usually exhibited by larva? ; so 
also with the legs. It would seem, in fact, as if ancestral adult char 
acteristics had been pushed back into the earliest larval stage. 
Larva pale pink, distinctly segmented, excessively long and narrow, 
with sides approximately parallel. Skin very finely, longitudinally 
striated. Xo hairs on anal ring. Two long caudal bristles, which, 
bent back, reach about the insection of last pair of legs. No anal 
lobes; hind extremity notched, with six short blunt spines. A row of 
stout bat short spines along each side, as in a Kermes larva. Cephalic 
end with a row of about ten tubular glands. Legs ordinary; digitules 
slender, those of claw short, those of tarsus long, extending far 
beyond those of claw. Tibia longer than tarsus, as is usual m adult 
(not larval) coccids. Antenna? jointed; the joints very distinct, with 
strong constrictions between them; joints with short hairs, last one 
13448— No, 4 4 
