iVest Austrcdian Coccidm. 451 



division being spherical and small, and having a wide circular 

 opening into the upper chamber, which is balloon-shaped. 



The 9 rests upon the ledge at the bottom of the upper chamber, 

 and its abdomen protrudes into the lower chamber, where the larvae 

 are deposited. Here also the larvse grow to twice their size before 

 seeking a suitable place to form a gall on their own account, draw- 

 ing nourishment, without doubt, from the inner walls of their "nest.'' 



Adult 9 secreting dorsally a tuft of white cottony matter. Dorsum 

 flat and circular, very chitinous and segmented, and densely perforated 

 with small pores, of which very small transverse rows mark the seg- 

 mentation. Ventrally very convex ; epidermis of ventrum thin, 

 bearing a few conical spines and perforated by multiocular pores ; 

 some of the spines are apparently arranged in transverse rows. Ros- 

 trum ample. Mentum short, cordate. Spiracles conspicuous. An- 

 tennse atrophied, sub-conical, not jointed. Legs absent. Viviparous. 



Larva crimson, with a double fringe of spines and two longitudinal 

 rows on dorsum. Antennae G-jointed. Rostrum ample. Legs stout ; 

 tibia and tarsus sub-equal. Tubercles inconspicuous. 



On 3Ielaleitca s^?. from Pinjarrah, W. A. I have attached 

 to this species the name of Dr. Alex. Morrison, M.D., to 

 whom I am much indebted for the identilication of many 

 of the host-plants mentioned in these notes. 



33. 82)1^^00066118 morrisoni, var. elongata, var. nov. 

 (PL XV, fig. 23.) 



The adult !^s ditfer from the type in being but a little 

 smaller. The galls however are more slender and often 

 longer than those of the type, and are grey-green in colour. 

 In this variety the outer bark of the gall continues to grow 

 for some inches, and fresh twigs form above its apex. Swan 

 River, 



Genus Cylindrococcus, Maskell. 



Insects inhabiting galls which appear to be aborted and 

 misshapen forms of the twigs of the plants. Anterior feet 

 present the remainder represented by patches on the epi- 

 dermis. Anal segment circular, slight convex, not prolonged 

 into a tail. (Maskell.) 



3-i. Cylindrococcus gracilis, pp. n. (PI. XV, fig. 24.) 



The gall of this species very much resembles that of S. spiniferus, 

 Maskell, but is much more slender and the imbricated bracts do not 

 project like those of 8. spiniferus. Length from 1 to \\ inch ; width 

 \ inch. Colour green. 



