102 SCIENCE BULLETIN, No. 18. 



neath. Antennae seven or eight joints; feet short and thick; anal t^ibercles 

 very small; anal ring with six hairs. Epidennis covered with small spiny- 

 hairs and small circular spinneret orifices. 



Maskell says : " This insect differs from D. alhizzice in the character of the 

 cottony cushion and upper covering, and also in the form of the feet and 

 antennae of the adtdt female and other minute characters. It would seem 

 that the upper cottony mass falls ofi at gestation, leaving the insect shrivelling 

 up in the cup formed by the lower cushion. 



477. Pseudococcus hibbertice. Cat. Coccidse, p. 103. 



Dactylopius Mlli, n.sp. 



Found upon the upper and underside of the leaves of a wattle {Acacia, sp.). 

 at Darwin, Northern Territory, by Mr. Gr. F. Hill; the female coccids con- 

 gregated together in clusters and protected by the green tree-ants {OecojyJiylla 

 tmiaragdina). 



Adidt female, pale brownish yellow, covered with white mealy secretion 

 and fringed ^^^th fine pencils of woolly matter, short on the cephalic portion, 

 but on the abdominal segments increasing in length until the terminal anal 

 pair, which are close together at the base, stand out as long as the whole 

 coccid. Leng"th, without anal tails, about j^ of an inch. General form 

 broadly oval, dorsal surface flattened. Antennae eight-jointed ; first shorter 

 and broader than the second and third, which are the longest, and of about 

 equal length ; fourth and fifth rather more slender, of equal lengths ; sixth 

 and seventh somewhat broader, but slightly shorter ; eighth as long as the 

 last two combined. Legs long with a spine at tip of tarsus above the claw. 

 Anal tubercle distinct, rounded, bearing one long hair, one stout short spine 

 and about eight hairs, with a group of spinnerets and hairs behind the anal 

 ring, which has six long hairs. Behind the anal ring is a curious process 

 appearing to have a central ridge with radiating lines on either side forming 

 an oval area. 



This species appears to come near Dactylopius citri, Risso, but differs in 

 the form of the antennae, anal tubercles, and the woolly filaments. 



Dactylopius lanigerus. Fuller. 

 Journal WeM Australian Bureau of Agriculture, vol. iv, p. 1345. 1897. 

 Trans. Ent. Soc, London, p. 454. 1899. 



Found upon Acacia pulchella' in Western Australia, where it is locally 

 known as the " snow scale." 



Adult females move about slowly, clustering together on the branches and 

 secreting great quantities of woolly filaments, which, matted together, hang 

 down in shreds from the twigs. Colour of female yellowish to dull brown, 

 with short tassels of cotton on each segment ; antennae eight- jointed ; anal 

 ring with eight hairs. Length, 0-9 inch. 



485. Pseudococcus lanigerus. Cat. Coccidae, p. 104. 



