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 ^in. An- 

 tennae of ten joints. Abdominal spike short, thick, with a curved 

 appendage. Feet normal. 



Habitat On Rubus australis, Riecarton Bush, Canterbury ; 

 on Knightia esccelsa, Cyathodes acerosa, Wellington. 



The very numerous conical spines distinguish this species 

 from that known as AcantJio coccus 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. ERIOCOCCUS PALLIDTJS, Maskell. 



N.Z. 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 Jin. 



Sac of male unknown. 



Adult female greenish-grey, turning to brown after gesta- 

 tion ; filling the sac ; shrivelling at gestation. Anal tubercles 

 rather large and conspicuous. Anogenital ring small, with 

 eight (sometimes six?) fine short hairs. Antennae 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 transverse row of small slender conical spines not 

 set closely together. Very many small scattered oval spinneret 

 orifices. 



Adult male unknown. 



Habitat On Myoporum Icetum (ngaio), Elceocarpus dentatus 

 (hinau), &c. ; throughout the Islands. 



* As a rule, a tibia shorter than the tarsus characterizes an insect not yet 

 arrived at the adult stage. The genera Eriococcus and Rhizococcus sometimes 

 present exceptions to this rule. See also, above, the genus Eriochiton. 



