SCALE INSECTS ( • COCCID.E •) OF AUSTRALIA. 67 



<lee.p punctures or pits, covering the dorsal area. Tlie sides flattened with 

 apparently the same number of rows of more irregular pits. Ventral surface 

 angular, thus giving the whole coccid a wedge-like shape. Length I of an 

 inch, width on flattened surface | of an inch. 



In specimens resting on the surface of the baik not constricted by the 

 angle of the twigs the under-surface is slightly concave and the upper surface 

 convex with two transverse carina:" and similar depressions. 



Antenna- six-jointed, first and second short, third large, long, longer than 

 the fourth, fifth, and sixth combined. Legs moderate, tarsus long. Anal 

 segment rounded on either side, distinct, curled under the coccid. Epidermis 

 covered with fine spiny hairs. 



Larva resting in the cavity under the abdomen caused bv the t\]) of the 

 abdomen turning downward. Cobnir bright red with the legs and antenna; 

 lighter ; front rounded, ta])ering to the tij) of the abdomen^ with the dorsal 

 surface bearing rows of fine white spines, the outer one forming a regular 

 fringe, anal tubercles with a long white seta. 



RhizococcK.s jiudidafKn. Maskell. 

 Trans. N. Zealand Institute, vol. xxv, p. 231. pi. xv, figs. 8-!). 1892. 



This species is another sent from ]\Iyrniong, Victoria, u])on the branchlets 

 of a she-oak {Casuariva. sp.) 



It has the general form of R. castiarince, but the adult female has no legs. 

 ■'Dark red, convex, sub-elli]itical and tapering somewhat ])osteriorly ; the 

 dorsuni exhibits two longitudinal grooves on the upper surface and two others 

 more shallow near the margins, and in these grooves are some rather long 

 shallow depressions or pits ; the epidermis is rough with great numbers of 

 very minute pustules. Length of insect about y;^ in. Anal tubercles small, 

 but conspicuous. Antenntt short, with six joints, of which the fourth and 

 fifth are shortest. Feet absent. Anogenital rino- with eight hairs, ^lentum 



o o o 



dimerous. The dorsal pustides are very noticeable after treatm<^nt with 

 potash."' 



Allied to R. casuarriicp and R. f/raiitJis, but besides being legless is distin- 

 guished by the dorsal corrugations, shallow pits and minute pustules. 



270. Rhizoccociis pustula'us. Cat. Coccidpe, p. 67. 



RInzococciiK tripartitii.s, Fuller. 



./ounial of J)i jif. of Agriculture, West Australia, vol. iv. p. 134o. 1897. 

 Trans. Ent. So,-., London, p. 443. 1899. 



This species comes from Western Australia, found u])on the axils oi the 

 branchlets of the she-oaks {Casuarina, sp.). 



According to Fuller's descrijjtion this species is very closely allied to, if not 

 identical with, one of Maskells species R. niamus, which he considers a 

 variety of R. caxiiariixr. I think that these three are probably only the 



