14 THE VICTORIAN NATURALIST. 



9 Scale more or less surrounded by cottony fluff ; lobes 



very large ... ... ... grandilobis, Mask. 



Scale not surrounded by fluff; lobes smaller; dorsal 

 surface of body with six spines ... ... ... lo 



10 Smaller, less than 2 millim. long ... spinifera, Mask. 

 Larger, about 3 millim. long sjoinifera v. major, Mask. 



11 Scale with much cottony fluff; hind end of female with 



eight pairs of long hyaline linear processes (Tricho- 

 mytilus, Leon.) ... ... formosa, Mask. 



Scale ordinary ... ... ... ... ... 12 



12 Scale snow-white ... ... ... ... 13 



Scale greyish or brown, at palest {melaleucce) greyish- 

 white .. ... ... ... ... 16 



13 A depression between the median lobes, which are the 



only ones well developed ... ... ... 14 



No marked depression between the median lobes .. 15 



14 Median lobes represented by thickenings of the margin 



casuarincB, Mask. 

 Median lobes rather prominent, rounded jjallens v. alba, Mask. 



15 Three pairs of well-formed lobes, all pointed nivea, Mask. 

 Lobes well developed but short, broadly rounded or 



truncate ... •-. ... lidgetti, Ckll., n. sp. 



16 Scale brown, linear ... ... glover ii (Pack.) 



Scale mytiliforra ... ... ... ... 17 



17 Squames flattened, with serrated ends; median lobes 



long and parallel ; scale buff colour hanksice, Mask. 



Squames spine-like ... ... ... ... 18 



18 Scale light greyish or greyish-white ... ... ... 19 



Scale brown ... ... ... ... ... 21 



19 A marked depression between the median lobes pallens. Mask. 

 No marked depression between the median lobes ... 20 



20 Female insect dark red, or nearly black grisea, Mask. 

 Female insect yellow ... ... melaleucce, Mask. 



2 r Median lobes wider, nearly entire ; on various plants 



pomorum (Bouche) 

 Median lobes narrower, serrulate ; usually on Citrus 



citricola (Pack.) 

 (M. citricola v. tasmanim, Mask., on Pomaderris apetala, is 

 hardly separable.) 



Mytilaspis lidgetti, n. sp. 



Female scale of the ordinary mytiliforra shape, rather narrow, 

 usually more or less curved, moderately convex, snow-white, the 

 exuvise bright reddish-orange, but the second skin more or less 

 covered by a thin whitish film. Length of scale about 3 millim. 



Male scale much smaller, snow-white, rather broad, more or less 

 loosely woven, so as to appear woolly ; no keel ; exuvia deep orange. 



