_Fiorinia acaciae_ covers the stems and twigs of _Acacia longifolia_ with its narrow white ribbed scale; it is much longer than broad, and is truncate at the extremities; this gives it a very distinctive character. The Genus _Diaspis_ contains a number of delicate, more elongated scales, among which is the well known white rose scale _Diaspis rosae_, common in the garden. _Poliaspis exocarpi_ is another white scale infesting _Oxylobium_, _Dillwynia_, and other bush shrubs; the male scales are long, slender, and loosely attached to the smaller twigs. The Genus _Chionaspis_, containing a number of cosmopolitan and indigenous species, has the base of the scale narrow, elongate, but broadly rounded at the extremity. _Chionaspis xerotides_ is white, common upon the blades of the sedge growing along the sea shore at Botany, N.S.W., and has a wide range. _C. eugeniae_ is a larger broader scale, variable in size and shape; it infests several native shrubs, and a very large form is found on the waratah. _Mytilaspis_ is another world-wide genus, in which the scales are attenuated at the base and are oyster-like in shape; _Mytilaspis pomorum_ is the common “Mussel” or “Oyster” scale of the apple tree found all over the world. _M. spinifera_ is a handsome, broad, white scale common on the weeping myall (_Acacia pendula_), growing in the interior. _M. striata_ is a very slender form of scale that has had to adapt its shape to the slender foliage of the Casuarina which it infests. _M. acaciae_ is a grey species that clusters thickly together in masses like the apple scale, covering the stems of several different species of Acacias in the bush with its stout irregular scales. [Illustration: Plate XXXIV.--HOMOPTERA. Family =Coccidae=. 1. _Apiomorpha urnalis_ (Tepper). 2. _Frenchia semiocculta_ (Mask.). 4. _Frenchia casuarinae_ (Mask.). 3. Galls of Buprestid beetles (_Ethon corpulentum_, Bohem.).] [Illustration: _Plate XXXIV.--HOMOPTERA._] In the Sub-family LECANIINAE the female coccids are active or stationary; naked or covered with some secretion; sometimes without legs; the abdomen marked with a median cleft and furnished with two dorsal lobes. Several species of the tropical Genus _Ceroplastes_ are found about Sydney, where they were introduced into the gardens at a very early date, and have since spread into the orchards and bush. The Indian wax-scale, _Ceroplastes ceriferus_, covers orchard trees, and bush and garden shrubs with its irregular rounded masses of greasy white matter that protect the liver-coloured coccids beneath. _C. rubens_ is a smaller and more regularly rounded dull red scale, the enveloping material forming a hard waxy shell.