426 Ala rgarodincB. 



secreting, after gestation, a mass of white woolly matter in which the eggs are 

 loosely embedded. Antenna {figs. 7, 8) ten-jointed, the tenth small and very 

 indistinctly divided from the ninth ; first and second joints stout, cylindrical ; 

 third with the basal half cylindrical, the apical half smaller and rounded ; the 

 remaining joints narrowed basally and expanded distally. All the joints have 

 a transverse, slightly constricted median zone, and there is a whorl of set« on 

 the apical half of each. Rostral apparatus completely concealed within a deep 

 fold, in the living insect, but conspicuous after maceration ; consisting of well- 

 developed tentorium and rostrum, but with no I'ostral filaments. Limbs 

 {fig- 4) strongly developed ; the tibia long, slightly constricted at a point a 

 little before the end, and with a dense terminal tuft of stout set^e the majority 

 of which are knobbed (seey?^. 5) ; tarsus strongly bowed ; claw {fig. 6) stout, 

 with three strong teeth on the apical half of the inner edge ; digitules repre- 

 sented by fine simple setje. Thoracic spiracles {fig. 9) trulliform (ladle-shaped), 

 the hollow of the bowl lined with polygonal glandular cells, the anchoring 

 piece (which represents the handle of the ladle) terminating in a series of hook- 

 like processes. Abdominal spiracles (yf^j-. 10, 11) six on each side, one pair 

 on each of the first six abdominal segments, opening on the venter just within 

 the margin ; visible, on the living insect, as a series of small punctures filled 

 with white secretion. The abdominal spiracles {fig. 10) are slightly smaller 

 than those of the thorax, and are poculiform (of the shape of a goblet), the base 

 of the hollow lined with glandular cells. Derm with numerous conspicuous 

 saucer-shaped compound pores {see figs. 10, 11, 12), each with a thickened rim 

 and a I'osette of either five or six translucent cells surrounding the central 

 aperture ; there is also a ring of minute circular cells between the rim and the 

 median cluster. A few, much smaller, simple pores, are scattered sparsely 

 around each stigmatic orifice. Each segment is encircled by a transverse series 

 of set£e, which are longer and stouter on the venter, more particularly so on the 

 abdominal segments. Anal orifice {fig. 13) minute, demarked by a semi- 

 circular chitinous band, and surrounded by irregularly concentric dermal folds, 

 on the outermost of which are six short seta3 (three on each side). Length 7 to 

 8 mm. Breadth 2-5 mm. 



Young larva {fig. 17) elongate, tapering in front ; bright yellow, eyes black. 

 Antenna {fig. 18) seven-jointed, the two terminal joints largest; the seventh 

 with four or five long hairs on its truncate extremity. Posterior extremity 

 with a fringe of short hairs and a pair of longer caudal set^e. Length vt, mm. 



A later larva (probably that of a male) was found within a small mass of 

 woolly secretion, in a crevice of the bark. It is of a very pale yellow colour ; 

 the antenna eight-jointed, all the joints — except the second — short and broad. 

 No trace of rostral apparatus. Legs with a small group of knobbed hairs at the 

 end of the tibia. Length 275 mm. 



Nymph occupying cavities constructed in the soft inner bark of the tree (see 

 fig. 14), from a quarter to half an inch from the surface. The cavities are lined 

 with a thin deposit of greyish wax. Insect {fig. 15) long-ovate, narrower 

 behind, unsegmented ; yellow, the skin smooth and polished ; limbs and 

 antennfe absent ; rostral apparatus present, complete with functional set£e ; 

 eight pairs of spiracles, of which two are thoracic and the remaining six 

 abdominal ; anal orifice small, horseshoe-shaped {fig. 16). Derm with 

 compound pores (similar to those of the adult), restricted to an area extending 

 inwards from the margin as far as the spiracleS; irregularly scattered on the 



