Q2 [M.irch, 



Antenna; dark brown, faintlj ringed with white, flattened in the S C'^e respective 

 diameters being about -05 and '07 mill.), whitish underneath. Maxillary and labial 

 palpi well developed, whitish. Legs blackish, more or less ringed with whitish. 



In colour and size, this somewhat resembles T. argentimaculella, 

 the most obvious points of difference being as follows : — The wings 

 are acutely pointed in vincuJella, but bluntly in argentimaculella, this 

 being most striking in the hind-wings, as it is rather hidden in the 

 fore-wings by the dense cilia. The markings in vinculella are broader 

 and not so silvery, and the minute apical silvery spots of argentimacu- 

 leUa are absent ; the markings also differ in shape in the two species. 



It may also be noted that the larva of ai'gentimaculella, which 

 feeds, like the present species, on lichens, makes no case. 



The following description of the very peculiar larva was taken 

 from a full-grown specimen, October 17th, 189i : — 



Length, 32 mill, when at rest, 3'8 mill, when stretched out in crawling. Breadth 

 of head, 0'4 mill., prothorax, 0"6 mill., mesothorax, 0'65 mill., metathorax, 07 mill. 

 Segments 7 — 11 are considerably broader, segment 8 being about 1 mill.; the last 

 segment is the same breadth as the head. These measurements are taken when the 

 larva is 3-2 mill, long, and would not be correct for the middle segments when it was 

 stretched out. It is rather cylindrical than flattened in shape ; the spiracular skin- 

 fold is much developed. 



The legs are very long, about 0-8 mill., but the claspers, though well furnished 

 ■with booklets, are very short and small. The anal flap is furnished with a fringe of 

 small dark bristles, and the bristles on the body generally are large, especially the 

 one which springs from a tubercle in the front of the spiracular region of the pro- 

 thorax, which is about 1 mill, in length, and, with its tubercle, capable of considerable 

 independent motion. The antennal processes are two or three-jointed, and rather 

 long, and bear a few bristles at the tip. 



The head and first few segments are rather polished, the posterior segments 

 duller, as is usual in ease-bearing larvse. The head, prothoracic plate, and leg plates 

 are somewhat dark brown, the general ground-colour pale yellowisli, and the larva 

 being rather transparent, the food is visible through the skin, which gives an 

 appearance of a greenish-grey dorsal stripe. The anterior margins of the first few 

 segments are whitish ; bristles tinged with the ground-colour ; spiracles incon- 

 spicuous. 



The pupa is 3'2 mill, in length, rather soft, straw-colour, except the abdomen, 

 which inclines to orange ; eyes nearly black. Skin rugose, segments not well defined. 

 Antennfe slightly longer than the body ; wing-cases almost as long as the body ; these 

 parts are considerably raised, and do not appear to be very closely attached, the last 

 five segments, and perhaps more, being certainly free. The maxillreare short, and lie 

 above and between the two sickle-shaped labial palpi. The maxillary palpi lie 

 nearly at right angles to the maxillae, just under the eyes, and end beneath the 

 antenna}. The three pairs of legs end at i\, |, and the end of the pupa. There 

 are a few small bris'tles about, the niouth, and also on the abdomen, but very incon- 

 spicuous. There is a considerable constriction between the head and prothorax. The 

 end of the abdomen is blunt, willi no hooks or bristles. 



