West Australian Coccidm. 457 



Oil Petrophila linearis, Swan River, W. A. At first 

 sight tiiis species looks in situ much like an Aleurodes, 

 and is often found in company with Farlatoria petrophila. 

 Like the foregoing species it rests in a slight depression. 



46. Asterolecanium styphelix, Maskell. 



This species is common on Styplielia sp. on the banks of 

 the Swan River, and has also been obtained at King 

 George's Sound. 



TARCHARDIINiE. 



Genus Tarchardia, Blanchard. 

 47. Tarchardia convexa, sp. n. 



Test of 9 dark brown, very convex, smooth, with two lateral 

 filaments protruding from circular orifices. Length 0"15 inch. 



Adult $ elongate, thoracic tubes conspicuous. Abdomen pro- 

 longed, with a chitinous ring at the apex ; ring with 10 hairs. 

 Antennae small atrophied, not jointed. Mentrum monomerous. 

 Anterior spiracles larger than the posterior, and surrounded by 

 groups of small pores. Dorsal spine conspicuous, with several 

 adjacent hairs. 



On Hypocalymma sp. Swan River. 



48. Tarchardia melaleucm, Maskell. (Plate XV, fig. 32.) 



(J red, elongate, sides of abdomen parallel, ends lobed. Spike 

 curved downwards. Antenna3 cylindrical, not tapering ; joints 1 

 and 2 short and stout, the rest long and narrow ; 3 the longest, 4, 

 5, and 6 diminishing, 6, 7, 8, 9, and 10 sub-equal ; apex of 10 

 rounded and bearing 5 conspicuous knobbed hairs. 



On Kmtzia or Melaleuca. Perth, W. A. 



LECANIINyE. 

 Genus Signoretia, Targioni-Tozzetti. 



49. Signoretia hcziclm, Dufour, var. australis, Maskell. 

 On various grasses and sedges. 



Genus Lichstensia, Signoret. 



50. Lichstensia hahearum, sp. n. (Plate XV, fig. 37.) 

 Adult $ brown, convex above, flat beneath, stationary, constructing 



a more or less spherical sac of a pure white, felted secretion, open at 

 the anterior end and exposing the median region of the dorsum. 

 Length 0"15 inch. Of a normal Lecanid form with usual cleft and 



