230 Transactions. — Zoology. 



Sac of male pupa white, cylindrical ; length about ^in. 



Adult female brown ; form normal ; length about ^Vm- 

 Antennae of six joints, of which the third is much longer than 

 the rest. Feet normal ; tibia about three-fourths the length 

 of the tarsus. Anal tubercles conspicuous and large. Epi- 

 dermis covered very thickly on the dorsal surface with small 

 irregularly oval markings, which are most numerous near the 

 margin, and with some circular spinneret-orifices. 



Female of second stage not observed. 



Larva brown, flattish, elliptical ; length about -g^in. An- 

 tennae of six joints. 



Adult male dark-brown ; length about ^in. Antennae of 

 ten joints. The anal " tails" are rather long. 



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

 Mr. Koebele, from Harwood, New South Wales. 



The minutely-speckled epidermis of this species, which is 

 not properly observable until properly prepared, sufficiently 

 distinguishes it from others of the genus. 



Genus Ehizococcus, Signoret. 

 Rhizococcus grandis, Maskell, var. spinosior. 



Adult female of the same colour and form as the type 

 (N.Z. Trans., vol. xxiv., p. 29), but smaller ; length about |in. 

 It resembles B. grandis in the antennae, in the smallness of the 

 anal tubercles, and in the characters of the larva. The prin- 

 cipal difference is in the dorsal spines, which are more 

 numerous ; perhaps, also, the lower pair of digitules are less 

 dilated. It would be easy, no doubt, to make a new species 

 of it : I prefer to consider it merely as a variety, especially as 

 the food-plants of the two belong to the same genus. 



Hab. In Australia, on Acacia implcxa. Specimens sent 

 by Mr. J. Lidgett, of Myrniong, Victoria. 



Rhizococcus casuarinse, sp. nov. Plate XV., fig. 7. 



Adult female varying in colour from yellow to dark-red ; 

 form normal, but the segments are scarcely noticeable. 

 Length about -lin. Antennae of six joints, of which the third 

 is nearly as long as all the rest together. Feet normal ; tibia 

 about half as long as the tarsus. Anal tubercles moderate, 

 but not observable in the natural state, being hidden by the 

 convexity of the abdomen. Dorsum bearing some slender 

 spines, some of which are very long. 



Larva red, flattish, elliptical; length about ^m. An- 

 tennae of six joints. On the dorsum are four median longi- 

 tudinal rows of very strong and long spines, and four other 

 rows of smaller spines, two of which are marginal. 



Male unknown. 



