1808.] 



97 



Bisetata — obtusely oval iu outline, not quite cylindrical, but rather 

 depressed ; irregularly covered with fine shallow reticulation ; colour 

 salmon-pink, with large spots of deeper tint. 



Immutata—a long cylindrical shape, flat at one end, more conical 

 at the other, strongly ribbed, with transverse reticulation ; colour pale 

 buff, speckled with strawberry-pink. 



Imitaria — somewhat pear-shaped, but flattened at the smaller end ; 

 strongly ribbed, and irregularly reticulated between ; colour glistening 

 white, with small blotches of delicate pink. 



The larva of liolosericata belongs to the shorter type of Acidalia, 

 and is perhaps the plainest in dress of all this very plain family. "When 

 full-grown, the length is a little over half-an-inch, in figure tapering 

 considerably towards the head, which is small and notched, tucked 

 under when at rest, thrown forward when in motion ; skin most wonder- 

 fully wrinkled and warted, the warts being on the wrinkles, and so 

 arranged that they form on the back a double ridge on each segment, 

 which contracts to a single median ridge at each fold, and another more 

 prominent ridge at the spiracles ; the segmental divisions very decidedly 

 cleft ; bristles short and clubbed : the larva feels very stiflT and firm ; 

 when disturbed it curls in the front segments in the same plane with 

 the rest of the body, and not on one side, a^ the longer Acidalia do. 

 In colour it varies little throughout its growth, being generally a veiy 

 muddy reddish-brown, but just after moulting almost black, the mark- 

 ings few and indistinct: the hinder^ segments are somewhat paler than 

 the rest of the body, the segmental folds are darker : there is a paler 

 dorsal line edged with black threads, which show most distinctly on 

 the hind segments ; and the dorsal ridges are paler than the ground. 



When full-fed the larvae retired into some sandy soil to undergo 

 their pupation. 



Interjeetaria. — This is also one of the short, stiff larvae, in figure 

 much like holosericata. "When full-grown, length about half-an-inch ; 

 tapering towards head, which is small, notched, and moveable : skin 

 very rugose, and ridged with warts not quite so prominent as those of 

 Jiolosericata ; bristles slightly clubbed. Colour a brownish-grey, hinder 

 segments paler ; a pale dorsal line with dark edges interrupted at the 

 four middle folds by a whitish dot, behind which comes a black X, the 

 arms of which reach beyond the dorsal ridges of warts ; the spiracular 

 ridge is paler than the ground, below it some oblique blackish dashes. 

 Pupa in a cocoon just below the surface of the fine soil. 



