228 Transactions. — Zoology. 



The appearance of the mass of cotton in which this species 

 is imbedded is rather curious. The insects seem to drop out 

 easily. 



Genus Eriococcus, Targioni-Tozzetti. 



Eriococcus turgipes, sp. nov. Plate XIV., figs. 15-20. 



Sac of adult female white, rather solid, very tough and 

 leathery ; form globular, but several sacs are frequently aggre- 

 gated in a mass. There is in most cases an orifice on the 

 dorsal region, but sometimes the sac is closed. Diameter 

 about ^in. 



Sac of male pupa not certainly observed, but probably of 

 the same material as that of the female, but smaller and more 

 elongated ; usually open at the top. 



In both female and male sacs there is a small quantity of 

 white loose cotton covering the dorsum of the insect inside the 

 sac, and separated from it. 



Adult female yellowish-brown, becoming nearly black at 

 gestation. Form subglobular, but slightly flattened dorsally, 

 and the median dorsal region is darker in colour than the rest. 

 Antennae of six joints, of which the third and the sixth are 

 much longer than the other four. Mentum large, dimerous. 

 Feet very thick, swollen, and partly atrophied ; the coxa and 

 femur very large ; the tibia, tarsus, and claw fused into one and 

 very small, so that when viewed from below they form a single 

 straight subcorneal joint, whilst if viewed from the side they 

 are irregular and curved ; digitules absent. Anal tubercles 

 very small, each bearing one moderate seta and a great num- 

 ber of short conical spines. Anogenital ring compound, with 

 six hairs. Epidermis bearing great numbers of short fine 

 hairs, interspersed with circular orifices and with short conical 

 spines ; the spines and the orifices are most numerous on the 

 median dorsal region. There are also several short spines on 

 the femur. 



Female of the second stage not observed. 



Larva brown, flattish ; form elliptical, but only slightly 

 elongated, so that it has a rather squat appearance ; length 

 about ^jin. Antennas long, with six joints, of which the sixth 

 is very long and fusiform, the second being the next longest. 

 Anal tubercles very small, convergent, and only bearing short 

 terminal spines instead of setae. The rostral setae are very 

 long. Feet normal ; lower digitules fine hairs ; the tarsal pair 

 are absent. 



Adult male unknown. 



Hab. In Australia, on Casuarina sp. Specimens sent by 

 Mr. Koebele from New South Wales. 



This is a very peculiar species, which possibly I might 

 have rather placed in the genus Gossyparia, on account of the 



