28 Transactions.— Zoology. 



and bright appearance when viewe(3 under a lens ; convex, 

 elhptieal : length about j^-m. There is usually an orifice at 

 the posterior extremity. The sacs are frequently clustered in 

 great numbers on the twigs. 



Sac of male rather lighter in colour than that of the female, 

 more cylindrical and much smaller : length about g'^in. The 

 glassy tubes are often not noticeable in this sac. 



Adult female dark-purple or almost black, filling the sac 

 but shrivelling at gestation. Antennae normally of seven 

 joints, of which the second and third are the longest and sub- 

 equal, the last four short and equal : in some specimens ob- 

 served the antennas appeared to have eight joints, the first 

 being very short ; but this would probably be quite exceptional. 

 Toot normal, the tibia being a very little shorter than the 

 tarsus; on the trochanter is a long hair ; digitules fine hairs. 

 On the dorsum are a very great number of short, thick, 

 conical spines not arranged in any definite order ; also many 

 small circular spinnerets with slender cylindrical tubes. Anal 

 tubercles conspicuous, each bearing on the inner side two 

 strong spines ; anogenital ring with eight hairs. 



Larva red, flattish, elliptical, active : length about -^qVH. 

 Antennas of six short subequal joints. Margin bearing a row 

 of strong, thick, conical spines, from which spring curling 

 glassy tubes. Anal tubercles rather small. 



Adult male not observed by me. I have a rough sketch 

 by Mr. Crawford which shows tvvO dorsal eyes, two ventral 

 eyes, and two ocelli, a short conical spike, and two very 

 long cottony " tails : " the antennae and feet are not 

 shown. 



Hah. In Australia, on Eucalyptus divcrsicolor (Adelaide, 

 from Mr. Gravv'ford) ; on Bursaria spinosa (Melbourne, from 

 Mr. French). In a memorandum of Mr. Crawford I find it 

 stated that the insect is " very destructive to young gum- 

 trees." 



This species, in the late Mr. Crawford's collection, origin- 

 ally received from him the name " Thekes eucalypti." In 

 assigning it to its proper genus I thought at one time of 

 changing the specific name, because it has been frequently 

 sent to me on Bttrsaria, and probably has also other food- 

 plants ; but, the insect having been referred to elsewhere {e.g., 

 by Professor Webster, in "Insect Life," vol. i., p. 363) under 

 the name Eriococcus eucalypti, it has been thought better to 

 leave it so here. No description of it has hitherto been pub- 

 lished. 



Eriococcus eucalypti, by the characters of its sac and of its 

 dorsal conical spines, belongs to that section of the genus of 

 which the New Zealand E. multispinus may be taken as the 

 type, as mentioned presently. 



