442 Mr. C. Fuller on smne species of 



resembles that of H. apiomorphx. The insects frequent 

 the deepest crevices of the bark, but are easily dislodged. 



12. Eriococcus imperfechis, sp. n. 



9 .sac thick white, elliptical, slightly convex, iucomplete beneath ; 

 length 0-1, width 06 inch. 



Adult $ fawn-coloured, filling sac, segmented, margin fringed with 

 short conical spines set at regular intervals. Antennae 7-joinled, 3 

 the longest, 2 and 4 subequal, 5 and 6 short, small and equal, 7 twice 

 the length of 6 and bearing a few hairs. Rostrum large ; mentum 

 conical, dimerous. Legs well developed, tarsus longer than tibia, 

 claws slender, upper digitules conspicuous. Anal tubercles large, 

 cylindrical, bearing several longish spines and setae ; apex conical. 



Second stage $ active and without sac. • 



On Melaleuca sp. This species has been noticed to leave 

 its food-plaut occasionally before secreting- the sac, and 

 was first discovered on a paling fence, against wliich the 

 host-plant was growing. 



13. Eriococcus simplex, var. dealhatus, Maskell. 



Eriococcus tricarinatus,?,^. n. (Plate XV, hgs. G, 6 a) 



$ sac elongate-oval, narrow behind, convex, with 3 longitudinal, 



dorsal ridges ; one median, the others placed half way between it and 



the margins and so dividing the dorsum into 4 subequal regions ; 



perforated behind, orifice small and circular. Length 0'08 inch. 



Adult $ filling sac, purple or brown, convex above, flat beneath, 

 tapering behind. Antennae 7-jointed, tapering, apical joint large, 

 globose and hairy; sequence (12) 3 (74) (56). Mentum dimerous, 

 conical, haired at apex. Legs slender, tarsus twice as long as tibia ; 

 upper digitules knobbed, lower dilated. Anal tubercles cylindrical 

 with 5 spines, 3 near the base and 2 at the apex ; apex tapering and 

 bearing a long seta. Anal ring large with 8 rather long flat hairs. 



On Eucalyptus gonqihocephala, on the galls of Mashellia 

 glohosa, Fuller. 



G-enus Oluffia, gen. nov. 



Characters : — Adult $ s stationary, with somewhat con- 

 spicuous anal tubercles which approach those of an 

 Eriococcus, but differ in having a chitinised prolongation of 

 the dorsal arc of the anal opening, between them. Antennae 

 7-joiiited, atrophied. Legs atrophied or absent. The name 

 of the late Mr. A. S. Ollitf has been respectfully attached 

 to this genus. 



