212 Transactions. — Zoology. 



this " at least half as big again" as those described by me last 

 year. Those in my own cabinet are sufficiently startling, 

 especially when one compares them with some of the minute, 

 almost invisible, Diaspids. The insects alive in their native 

 locality must be worth seeing ; and I should greatly like to 

 investigate them there, and to see the males. 



Coelostoma australe, Maskell. Trans, of Linnasan Soc. 

 of New South Wales, 1890, p. 280. 



A characteristic feature of the male of this species is the 

 long brush of white glassy filaments springing from the abdo- 

 minal extremity. Having received from Mr. Koebele a large 

 number of pupae, each enclosed in a mass of white cotton, 

 " found on the ground amongst Eucalypts, between leaves, 

 and under pieces of stick, bark, &c," I have been enabled to 

 watch the process of hatching, and the growth of the caudal 

 " brush." The pupa itself is light-red, elongated and some- 

 what slender, showing rudimentary wings and feet. On 

 emergence therefrom the adult male is also light-red, the body 

 very soft, and the wings flabby and weak. The colour deepens 

 gradually, and the wings expand and become strong ; it 

 appears to be a couple of days before the insect acquires its 

 full deep-red colour of the body and nervures. At first there 

 is no sign of the caudal brush, the filaments of which com- 

 mence to grow after five or six hours, and take two or three 

 days before they reach their full development. Sometimes, 

 when fully grown, the brush forms quite a wide fan of fila- 

 ments ; at other times the filaments are more parallel. I have 

 kept twenty or more of these males in a glass-covered box for 

 more than a fortnight before they died. 



This is not the only Coccid male which exhibits a caudal 

 " brush" — a similar feature exists in Orthezia urticce, Linn., and 

 in Gallij)a'p])iis tvesttooodii, Guerin, both of them European 

 insects. But the females of these differ from Colostoma in 

 possessing rostra, and Orthezia also has only eight joints in 

 the antennas, and belongs therefore to the Dactylopida. 



Coelostoma rubiginosum, sp. nov. Plate XVII., figs. 7-11. 

 Adult female dark reddish-brown in colour, but covered 

 with great numbers of short, slender, semi- waxy filaments of 

 lighter colour, the whole producing an effect like rusty iron. 

 Body elongated, thick, much wrinkled but not distinctly seg- 

 mented, and the margin shows as a ridge running round the 

 insect. Length variable, specimens seen from -Jin. to fin. 

 Antennae of eleven joints, subequal and tapering ; each joint 

 has some short spiny hairs. Beet rather long; the tibia and 

 tarsus are both much curved ; the claw is slender, and the 

 articulation with the tarsus not apparent ; digitulcs absent ; 



