Moiiophlebincc. 45 1 



extremity and with several similar set;e on the inner side. Limbs varying in 

 size and proportions (seeyf»^. 4, 6), the principal difference beinj^ in the thick- 

 ness of the femora ; but they have all one common character, namely, the 

 presence of one long and several shorter seta; on the inner edge of the femur, in 

 addition to the usual sets on the trochanter. The claw is, normally, acutely 

 falcate {fig. 7) ; but, in one individual, the claws on all the limbs were short and 

 blunt {fig. 5). The anal ring (seefi'g. 8) is characterised by a conspicuous circle 

 of crowded polygonal cells, and the anal orifice is masked by a dense cluster of 

 longish stout seta;. The ceriferous tracts are recognisable by the more crowded 

 condition of the spines. They are not so sharply defined as might be expected 

 from the arrangement of the waxy processes. The spines on the ceriferous 

 tracts (fig: 9) are somewhat abruptly acute at the apex and swollen towards the 

 base. Exceptional forms are slightly expanded towards the apex (fig: 10), 

 while others {fig. 11) have the basal expansion terminating above in a more or 

 less distinct shoulder. The spines on the intermediate areas taper evenly 

 from the base to an acute apex {fig: 12). Small quadrilocular pores outline the 

 ceriferous tracts (see fig. 9) and are scattered amongst the spines of both the 

 tracts and the intermediate areas, extending also on to the venter. Larger 

 quadrilocular pores {fig. 14) are crowded upon the area surrounding the 

 abdominal concavity. These pores, seen in profile, show a delicate membranous 

 outward extension ( /ig. 1 5). The pores associated with the anal tract arc of a 

 more complex character, having two concentric beaded rings surrounding a 

 central oval, trilocular or quadrilocular aperture {fig: 16). The outer beaded 

 ring is often obscured by a thickening of the chitinous wall of the pore. Pores 

 with oval or obscurely triangular apertures, encircled by a single beaded ring 

 (fig: 17) occur on the area immediately surrounding the genital orifice. As they 

 recede from the genital tract these pores acquire definite trilocular or quadri- 

 locular apertures, while still retaining the beaded ring (fig: 18). Wherever the 

 derm is thicker or more densely chitinised translucent dermal cells can 

 be observed, in close association with the spines and pores. There is a 

 marked differentiation, on the venter, between the derm of the thorax and 

 abdominal regions. The derm on the central area of the abdomen — corre- 

 sponding with the marsupioid concavity — is very thin and but sparsely clothed 

 with small set^e and pores (see fig. 2). Some of the setae, on this area, are in 

 small groups of from two to five, each group arising from an irregular, slightly 

 prominent plate (figs. 19, 20). More rarely there are irregular tubercles bear- 

 ing from eight to ten seta? {fig: 21). The genital orifice occupies an approxi- 

 mately central position in this area. There are five small, translucent oval 

 cicatrices towards the posterior extremity. The derm of the thorax, on the 

 other hand, and of the margins of the abdomen, is thicker and more densely 

 clothed with pores, spines, and sette. The area immediately surrounding 

 the mouth-parts is densely clothed with long, stout setic, with simple abruptly 

 expanded bases, amongst which area few rather larger seta; arising from collared 

 sockets (see fig. 13). I have been unable to determine the number of abdominal 

 spiracles, though I have observed their occurrence in the species. As noted 

 above, the size of fully adult examples varies to an unusual extent, the over-all 

 dimensions ranging from g'5 X 75 to 22 x 14 mm. 



Young larva with dorsal spines similar to those of adult. Antenna five- 

 jointed, the fourth joint very short, the fifth broadest. Anal ring with a double 

 row of elongate cells. Length averaging ri2 mm. 



