90 SCIENCE BULLETIN, No. 1 



abdominal segments covered with fine, dark, irregular oval areas, forming a 

 fine tessellation of the surface in bands between the segmental divisions, 

 and also covering the lower j)()rtion of the anal tubercles. The sacs look 

 like those of Eiiococcus tejjperi, but the examination of the enclosed female 

 coccid shows that it is a very distinct species. 



Eriococcus tricarinatus, Fuller. 



Journal West Australian Bureau of AgrieiiUure, ]). 134.5. 1897. 

 Trans. Ent. Soc, London, p. 442, pi. xv, figs. 6, 6a. 1899. 



The tyi)e specimens were found upon the galls of MashcUia fjlobosd growing 

 u]»()n E ucalyptHs f/onipho(e]>haleh:. Western Australia. 



The sac of the adult female white, elongate, oval, tapering behind with 

 three longitudinal ridges down the centre and sides, with a small circular 

 orifice at the apex. Length, 0-08 inch. 



Adult female dark brown, convex on summit, tapering to the extremitv. 



Antennjie com])osed of seven joints, the apical one longest. Legs slender. 

 Anal tubercles cylindrical, furnished with five setfr, three near the base 

 and two at the apex. Anal ring with eight rather flat hairs. Legs: tarsus 

 as long as tibia, upper digitules knobbed, lower digitules dilated. 



Eriococcus rillofia, n.sp. (Fig. Go). 



The insects were collected on the twigs of the native blackthorn {Biimna 

 spiiiom), growing on the banks of the Clarence River, near Grafton, New 

 South Wales. 



Sac of adult female elongate oval, rounded and slightly depressed at the 

 extrenuties, and sometimes slightly constricted at the tip ; the anal aperature 

 circular, well defined, well uj) fr(>m the margin. Formed of closely-felted 

 cottony filaments, which have a distinct transverse segmentation, the surface 

 clothcil with a fine down of silvery hairs which almost form a fringe at the 

 extremities in perfect specimens. Longer than broad, i of an inch in 

 length. 



Adult female dull yellowish brown, broadly rounded. Length about \\x 

 of an inch. Antennae composee of seven joints- the first broad, second 

 short, fourth narrow, fifth shortest, sixth a little longer with stout s])iny 

 hair on outer niargin, seventh rounded with spiny hair on the side, and 

 finer hairs at the ti}). Legs normal. Anal tubercles short, broad at the 

 base, but about two-thirds from the base the inner margin is deeply arcuate, 

 with a short stout spine standing out on the angle, with a long central seta 

 at the rounded tip above. Anal ring with apparently eight flattened hairs. 

 Epidermis thickly covered with short angular semi-transpatent spines. 



This is another form allied to Eriococcus eucalypti with the epidermis 

 covered with short thorn-like spines, but the difierences in the form and 

 structure of the sac, and the ])oints iji the anatouxy of the female coccid, give 

 it s])ecific rank. 



