146 Transactions. — Zoology. 



length about ^'^iu. Antennae of six subequal joints, the last 

 bearing three or four long hairs. Mentum dimerous. Dorsum 

 covered with a great number of small line spines, and at the 

 edges two rows of strong conical spines. Anal tubercles con- 

 spicuous, setiferous. 



Adult male orange-yellow, the thorax darker than the 

 abdomen. Abdomen slender, ending in a short genital spike, 

 with the usual curved appendage of the genus ; last segment 

 bearing two lougish seta3, from which spring very long white 

 cottony "tails." Eyes four, tw^o dorsal and two ventral; 

 ocelli two. Haltere long and slender, with one long seta. 

 Antennae of ten joints — the first very short ; second twice as 

 long and rather thick, dilated at the end ; third to eighth 

 slender, the third very long, the rest gradually decreasing ; 

 ninth very thick, short and round ; tenth also thick, but rather 

 longer than the ninth : all the joints bear numerous hairs. 

 Feet normal ; digitules fine knobbed hairs. 



Hab. On Fagus menziesii in New Zealand. I have plea- 

 sure in attaching to this species the name of Mr. Raithby, 

 who has furnished me with many specimens. 



This, in every respect but one, possesses the characters of 

 the genus Eriococcus. The seven- jointed antenna of the female 

 is abnormal, but I am not inclined to remove it from the 

 genus on that account aloiie. In the group Dactylopidtv , as 

 the insects composing it do not exhibit conspicuous anal 

 tubercles, and excrete only thin cotton or meal, it is neces- 

 sary to lay stress upon some character such as the joints of 

 the antennae. But in the Acanthococciche the presence or 

 absence of a sac is sufficiently distinctive ; and as in the genus 

 Bhizococcus I have placed B. totara, with often only five 

 joints in the antennae, so now I see no valid reason for ex- 

 cluding this new insect from Eriococcus, although the normal 

 number of joints in that genus is six. As to its specific posi- 

 tion, the character just mentioned, and also the form of the 

 male antenna, serve to separate it from others of the genus. 

 The female sac may be distinguished from that of E. multi- 

 spinus by its smoothness and close texture ; the male sac 

 differs also from that species in colour as well as in the close- 

 ness of its felting. A further character, separating it from 

 E. mnltispimis and also from E. j^allidus, is the absence of 

 large conical spines on the dorsum of the adult. 



Genus Gossypaeia, Signoret. 



Adult 1'"' .^les not entirely covered by a sac, but excreting 

 a cottony mass, which is thickest beneath them, and either 

 very thin or absent altogether over the dorsum ; anal tubercles 

 conspicuous ; feet and antennae retained. 



The distinction made by Signoret between this genus and 



