456 MonophlebincF. 



inner side ; tarsus (excluding claw) approximately half as long as tibia. Claw 

 {fig. 18) long, slender and sharply pointed, falcate; with two simple hair-like 

 digitules. Derm of dorsum closely covered with short stout spines, their 

 extremities bluntly rounded {figs. 19, 20) ; except on the ceriferous tracts where 

 there are crowded clusters of more elongate, somewhat flask-shaped, sharply 

 acuminate spines {figs. 21, 22). Anal aperture opening on to an area which is 

 devoid of spines, but crowded with circular pores {fig. 23) which vary in size, 

 but are all of the same structure — saucer- shaped, with a central circular orifice 

 (see fig. 24). Surrounding the anal area are some irregular cicatrices or 

 folds bearing, on their margins, stout acuminate spines similar to those on the 

 ceriferous tracts. Large circular or broadly ovoid pores are scattered over the 

 derm, sparsely on the dorsum but thickly on the venter. These pores have 

 elongate, bilocular (occasionally trilocular) orifices {fig. 26). The ceriferous 

 tracts are encircled by a row of smaller pores with quadrilocular orifices (see 

 fig. 28). There are six abdominal spiracles {fig. 25) on each side, opening on 

 the dorsum at some little distance within the margin ; the sixth pair situated 

 close behind the anal aperture (see fi^. 2-;^. Venter closely covered with 

 longish stout setce ; a few similar isolated setae, amongst the spines, on the 

 dorsum. Length (exclusive of processes) 675 to 7-5 mm. Breadth across 

 middle 475 mm. 



No males, in any stage, have been observed. 



Paucity of material makes the determination of the sequence of the earlier 

 stages difficult. No ova or early larva? have been found. In the earliest stage 

 observed, the dorsum is closely covered with curling white or yellow {fig. 4) 

 waxy filaments. In this stage the antennas {fig. 14) are five-jointed, the third 

 elongate, the fifth fusiform and clavate, with longish slender setae. Limbs 

 comparatively slender ; the tarsus more than half as long as the tibia. The 

 dorsum is rather closely covered with acuminate spines similar in structure to 

 those found on the ceriferous tracts in the later stages. These spines are 

 collected into irregular clusters circumscribed by a row of quadrilocular pores, 

 and intermingled with longish setae. There are two very simple abdominal 

 spiracles on each side, near the posterior extremity of the body. Length 

 (exclusive of waxy appendages) 2 to 2'25 mm. 



What I believe to be the next stage has been identified from the exuviae only 

 {fig. 9), in which the dorsum is closely covered with stouter and more compact 

 yellowish or white processes. 



Immediately after the next moult the insect appears as at figs. 2 and 3. It 

 is then of a dark purple-brown colour above ; pale orange beneath. The 

 dorsum is minutely punctured and the segments indicated by well-defined 

 transverse furrows. There is a close marginal fringe of white (or pinkish 

 orange) flattish truncate waxy processes ; a double medio-dorsal series (six 

 pairs) of short truncate cylindrical processes ; and a dorso-lateral series (eight 

 on each side) of similar, but slightly larger, processes. Three similar, but con- 

 siderably larger, processes are placed on each side of the thorax, between the 

 dorso-lateral and marginal series. All of these processes increase in length 

 during the subsequent growth of the insect. Antennae {fig. 13) six-jointed. 

 In this stage the dermal spines have become differentiated into compact clusters 

 of acuminate spines on the ceriferous tracts, with bluntly rounded spines com- 

 pletely covering the intermediate areas. Length of body 3 mm. 



The succeeding stage {fig. 5) is characterised by dorsal, dorso-lateral, dorso- 



