NOTASPIS SERRATA. 369 



Abdomen not much arched, nearly parallel-sided. 

 Progaster slightly rounded, and raised above the 

 cephalothorax. Posterior margin rounded and de- 

 pressed, sometimes with a tendency to a median inden- 

 tation. The whole outline of the abdomen is, or 

 appears, rough and irregular, from the texture and 

 shrivelling of the skins, and the foreign matter which 

 adheres to them. The cast notogastral skins are car- 

 ried on the back, flat and concentrically, but shrivelled 

 and so hidden by debris, &c., that they often are only 

 noticed in consequence of the serrated hairs which 

 border them. The central (larval) skin shows an indi- 

 cation of fine, transverse, irregular corrugations. Each 

 skin is bordered by a closely-set row of long serrated 

 hairs, which stand outward and backward from their 

 respective insertions, and curve strongly upward and 

 inward at their distal ends ; those on the outer skin 

 are usually far the longest. If the specimen be well 

 preserved and has not been disturbed, these hairs 

 stand in concentric rings, the outer ring projecting far 

 beyond the body; if, however, the nymph has been 

 rubbed or wetted, the hairs get into confusion, and 

 appear to be a mere tangled bunch, without arrange- 

 ment; those on the larval skin are usually chiefly 

 rubbed off. 



Distribution.— I have found the species in Hopwas 

 Wood (Warwickshire), and more abundantly at Amble- 

 side (Westmoreland) and Keswick (Cumberland). Mr. 

 Bostock has found it at Stone (Staffordshire) and 

 Colwyn (North Wales). It is usually among lichen on 

 walls, in rather dry places. It is not common. 



VOL. II. 24 



