West AvMralian Coccidse. 455 



the length of tarsus. Anal tubercles absent, represented by two small 

 chitinous discs. Anal ring granular, with 8 hairs. Epidermis with 

 scattered fine hairs and compound spinnerets. Length 0"9 inch. 



Adult ^ brownish-yellow ; antenufe hairy, 9-jointpd. Abdomen 

 short not tapering, and bearing several short setae on either side of 

 the short style. 



Larva reddish. Antennae 6-jointed, sequence 6 (12) (3,4,5). Ab- 

 domen truncate, tubercles short and rounded, with two conical spines 

 median of base, each with a long seta. 



Eggs red. 



On Acacia pulcliclla. Trivial name " Snow scale." The 

 larvse and eggs are found amongst the secreted matter 

 which adheres loosely to any object brushing against it ; 

 in this way the species is no doubt spread about. 



ASTEROLECANIIiE. 



Genus Lecaniodiaspis, Targ. (Prosopophora, Douglas.) 



42. Zecaniodiaspis acacia, Maskell. 



This species occurs quite commonly in Western Austra- 

 lia upon Acacia cyanophylla and A. microhotrya. The ^s 

 of the second stage are very Lecanid in general appear- 

 ance, the abdomen being cleft and the tubercles like small 

 triangular lobes. 



43. Lcccaiiodiaspis mclalcitcm, sp. n. (Plate XV, fig. 31.) 



Adult $ enclosed in a thin, complete test of paperlike secretion. 

 Viewed from above, the test is ovate with a faint, median carina and 

 several fainter transverse ridges. The posterior end is the wider, 

 and the extremity is pinched up and projects slightly. Viewed 

 from the side the dorsum is seen to be very convex whilst the 

 ventral surface is concave, so that there is a decided keel all round 

 the margin of the test at the junction of the upper and lower halves. 

 Tlie colour of the test is externally grey, but the inner surface is 

 yellow. Length 017 inch ; width 0"12 inch. 



Adult $ filling the test ; dorsum convex ; segmented. Colour 

 dark grey, brown or tinged with yellow. Antennas cylindrical, 8- 

 or 10-jointed. Legs small and atrophied. Abdomen ending in a 

 slight depression, on either side of which are somewhat elongate 

 lobes without spines or sette ; each lobe is striated and near the 

 apex there are several small pores. Anal ring with 10 short hairs. 

 The margin of the body bears a few small, stout spines, and the 



