New British Orihatidee. By A. D. Michael. 389 



sparsely-serrated, colourless spines, the hindermost of which is cen- 

 tral. There are three pairs of similar spines on the notogaster. 

 Bound the margin of each nymphal skin are about twenty brown, 

 chitinous, more or less conical papilla ; these gradually enlarge in 

 size from anterior to posterior ; each carries an excessively long 

 slender spine of clear chitin, sparsely serrated ; the anterior are 

 mostly doubly-curved, and stiff, or nearly so, and are of similar 

 form on the two sides of the abdomen ; those nearer the posterior 

 extremity are more flexible. Many of the spines are longer than 

 the whole length of the body, and as they stand out radially, and 

 border each cast skin, they give the creatare a most extraordinary 

 appearance. Some of the spines which project over the cephalo- 

 thorax cross and form a series of bilateral figures, all different. 



The larva, plate VII, fig. 1. 



This is almost colourless, slightly grey ; its appearance in other 

 respects may be gathered from the above description of the cast 

 skin. 



NoTASPis SERBATA sp. nov., figs. 2, 2a. 



A species chiefly characterized by the extreme length and serra- 

 tion of the hairs on the notogaster, and by being thickly covered 

 with short processes of the cuticle, which looks like a confervoid 

 growth, and it is often strewn with small particles of lichen, &c. 



Colour dull darkish-brown. Texture entirely without polish ; 

 coarsely pitted with circular or sub-circular areolations. Shape 

 pyriform, posterior margin very round. 



Eostrum narrow, rounded ; rostral hairs curved and pectinated. 

 Cephalo thorax long, constricted at the juncture with the abdomen. 

 No lamellae, nor trans-lamellse ; lamellar hairs curved inward and 

 serrated. Pseudo - stigmata near together, strongly projecting. 

 Pseudo-stigmatic organs medium length with fine peduncles and 

 short pyriform, almost globular, heads. Interlamellar hairs long, 

 flexible, pectinated. Legs moderately long. Tarsi almost elliptical, 

 but with long peduncles bearing the claws. Tactile hairs short. 

 A whorl of curved, pectinated hairs on each of the three central 

 joints of each leg, except the tibiae of the hind pairs. 



Abdomen oval, narrow anteriorly, broad posteriorly, where the 

 notogastral plate is bent down so as to form some part of the 

 ventral surface. There is a somewhat irregular row of very long. 



