1873.] 247 



When full-grown, the larva is nearly three-quarters of an inch in length ; though 

 convex hoth above and below, yet its shape appears a little flattened ; the broadest 

 segment is the ninth, from which those in front taper very slightly towards the 

 head, which is the smallest segment, and is indented on the crown ; the last four 

 segments are also very little tapered until near the anal tip ; all along the sides, the 

 inflated spiracular ridge is interrupted at each segmental division, and there are four 

 sub-dividing wrinkles at unequal distances on the back, and twelve at equal 

 distances on the belly, of each segment. The ground colour, according to the in- 

 dividual, is either brownish grey or reddish or ochreous brown : the head, dark in the 

 centre, is brown, and freckled with darker at the sides ; the sub-dorsal line begins a 

 little below the crown of each lobe, and continues very distinct to the end of the fifth 

 segment, the dorsal line beginning on the second segment, and continuing distinct for 

 the same distance, both being pale ashy or ochreous in colour ; from thence to the tenth 

 segment both dorsal and sub-dorsal lines generally become so suffused in their course 

 as to be but partially visible, and, in some instances, hardly to be traced through the 

 brown bands which cross each of those segments, namely, a narrow band in front, 

 and a broad one ou the hinder part, leaving between them but a small space of the 

 ground colour ; on the last four segments, however, the lines are more distinct. At 

 the end of the fifth segment on either side is a conspicuous round bkck spot near the 

 sub-dorsal region, followed in some instances by another, a trifle smaller, on the end 

 of the sixth. In segments five to nine, inclusive, the back of each bears the following 

 detads, composed chiefly of brown freckles, moi'e or less confluent, viz. : on the 

 dorsal region in front of each, two simple leaf-like shapes of darkish brown, pointing 

 backwards, united at their base but diverging near their tips, which end at the 

 anterior pair of tubercidar black dots ; on the hinder part of each of these segments 

 are equally wide dorsal shapes of brown, merged together at their base, but soon 

 separating into Vs with double side strokes, the outer stroke of each pair being 

 longer than the inner, and reaching to the side, the central space between the inner 

 strokes mostly filled up with the same brown colour until near the anterior pair of 

 dots, where it fades away ; the posterior pair of black dots just within the outer 

 strokes, and not far from the segmental division. Instances occur where these outer 

 oblique dark strokes are margined a little way on their course by pale ashy or 

 ochreous. The ninth segment is paler than the others, and the tenth paler still ; and 

 on the back of the three hinder segments, the markings are very simple rudiments of 

 the preceding detads. The sides are throughout clouded and streaked with darkish 

 brown, and on the thoracic portion a strong dark brown line borders the pale sub- 

 dorsal below ; the spiracles are of the ground colour, ringed with darker brown. The 

 belly of each segment is darkish grey-brown at the sides, with a paler ashy-tinted pear- 

 shape in the middle, outlined with dark brown, and on the narrowest part of tliis 

 pear-like outline, is placed on each side a conspicuous blackish spot ; a whitish ashy 

 stripe runs down the centre, widening at the end of each segment, and inteiTuptedly 

 outhncd with blackish, most strongly at its widest part. 



The most noticeable variety among the lai-vce I had, was of a pale grey groUnd 

 colour, in which the dorsal line could be distinctly ti'aced throughout, though but 

 little paler than the ground, and (as in many other species of Acidalia) was strongly 

 bordered at the beginning of each segment with a short black mark (and this again, 

 in one instance, with a white mark), these black marks, becoming more and more de- 



