300 Transactions of the Society. 



flexible, serrated liairs riiinul the margin of the uotogaster, and two 

 rows of about three similar hairs nearer the median line. Ventral 

 plate small. Genital and anal apertures large, the former almost 

 square, the latter diamond-shaped. 



Nymph. 



The usual a})])earance of the creature is an irregular lump of 

 small pieces of lichen, white powder, and debris, from which springs 

 a forest of long serrated hairs, standing out on every side far 

 beyond the body. 



Colour pale-fawn or mouse-colour. Texture rough and leathery. 

 Shape almost oblong. 



Cephalothorax distinctly divided into rostrum and hinder part; 

 the latter nearly as wide as the abdomen. Kostral hairs long, ser- 

 rated, curving inward, and usually crossing. Pseudo-stigmatic 

 organs and interlamellar hairs as in adult. Legs short, fourth 

 pair hardly reaching hind margin, thick. Femora of two front 

 pairs considerably enlarged ; wliorls of serrated hairs as in adult. 



Abdomen not much arched, nearly parallel-sided. Anterior 

 margin slightly rounded, posterior rounded and depressed ; some- 

 times with a slight median indentation. 'J'he out-bne rough from 

 the texture and shrivelling of the skins and the foreign mattter 

 adhering to them. The cast notogastral skins are carried flat 

 and concentrically on the back, but shrivelled, and so hidden by 

 debris that they can often only be noticed from the long serrated 

 hairs which border them. The larval skin shows indications of 

 transverse corrugations. Each skin is bordered by a close row 

 of very long serrated hairs, directed outward and backward, but 

 curving strongly upward and inward at their distal ends. Those 

 on the outer skin are usually far the longest. 



I found the species first at Hopwas "Wood, Warwickshire; since 

 then I have taken it more abundantly at Ambleside, Westmorland, 

 and Keswick, Cumberland ; Mr. E. Bostock has sent me specimens 

 from Stone, Staffordshire, and Colwyn Bay, North Wales. It is 

 usually amongst lichen on walls or rather dry places. 



KoTASPis JuxcTA sp. Hov., plate YII. fig. 3. 



Average length about •22 mm. 



„ breadth „ IS „ 



„ lengthof legs, 1st pair, about '12 „ 



„ ,, 2nd and 3rd pairs, about 11 ,, 



„ ,, 4th pair, about "15 „ 



A minute species, remarkable for the form of the lamellse, which 

 meet in the middle of the cephalothorax, and for their long, closely- 

 approximated cusps. 



