45^ Mr. C. Fuller on some species of 



Adult 9 like S. spiniferus, with the remarkable palmate append- 

 ages at the extremity of the abdomen. Antennae atrophied ; wide at 

 the base and tapering ; apex sharp and slightly curved ; apparently 

 3-jointed. Anterior feet atrophied. 



Larva red, active, elongate. Antennae 6-jointed. Eyes distinct. 

 Legs long and slender ; tibia longer than tarsus, only one long upper 

 digitule. Tubercles moderate, apex truncate bearing on the inner 

 margin a strong spine, and on the outer side of the apex a long seta. 

 Six longitudinal rows of spines on the dorsum, the median pair of 

 rows and those on the margins long, the latter conspicuously so ; the 

 other two rows small ; the spines are borne upon the last 9 segments, 

 6 to each. Tlie long lateral spines are serrate at the apex, and slightly 

 dilated. 



On Casuariiia Jmmilis (?). Swan River, W. A. 



Genus OuROCOCCUS, gen. nov. 



Adult $s stationary, inhabiting crevices in the bark of 

 their food-plant, and secreting a single long glassy " tail " 

 from between the two more or less distinct tubercles in 

 which the abdomen ends. Abdomen tapering. Antennae 

 more or less atrophied. Feet absent or atrophied. $ and 

 larva unobserved. 



85. Ourococcus eucalypti, sp. n. (PI. XV, figs. 28, 29, 30.) 



Adult $ surrounded by a black waxy secretion and occupying a 

 deep-seated cavity in the bark. Abdomen tapering slightly and 

 ending in two incurved sharp points, which almost meet, enclosing a 

 circular space, through which the long glassy tail is secreted. Body 

 sub-globuhir, not distinctly segmented ; abdominal region strongly 

 chitinous and ventrally much striated with irregular corrugations 

 converging towards the extremity. Eostrum long, mentum conspic- 

 uous, dimerous. Antennae atrophied, short, tapering ; apex truncate, 

 with a few short hairs ; apparently 3-jointed. Legs absent. Spira- 

 cles large. Epidermis with many multiocular pores. Within the 

 abdomen when cleared with liquor potassx. there is discernible a 

 peculiar sub-cordate chitinous organ, which is densely covered with 

 tubular processes ; the apex of the organ is directed towards the 

 cephalic region, is truncate, and a small circular opening into the 

 organ can be seen ; on each side of this ojjening there is a prominent 

 tube-like process. On either side of this organ are somewhat similar 

 but smaller and circular organs. Behind the central organ a groove 

 extends to the base of the points. A distinct group of pores extends 

 from the base of each antennae to the i)osterior spiracle. 



