286 British Oribatidcz : Notes on New and Critical Species. 
interlamellar hairs. Pseudostigmatic organs like those of 
splendms in form and position, but more slender. 
The creature is of a very pale straw colour and very 
active. Some specimens show vague traces of the usual 
lamellae curving inwards from the pseudostigmatic. If 
present at all they are linear and indistinct. 
From ground moss. West Allendale ; also sent to me by 
Mr. Bagnall from two or three localities in Durham. 
D. lanceolatum Mich., var. now lunare. (Plate A, fig. 5). 
This form differs from the type solely in having the 
lamellae continuous, joined together immediately behind 
the. lamellar setae as by a translamella. This variety is 
known to Oudemans (New List of Dutch Acari. 1900). He 
mentions another form in which the lamellae extend beyond 
the lamellar setae and then curve inwards : this I have never 
seen. 
Yar. lunare occurs, though not frequently, both among 
the hills and on the coast (Northumberland and Durham). 
D. formosum sp. n. (Plate B, fig. 5). 
Length about 320 
Cephalothorax rather broad. The lamellae are dark 
ridges with their bases (adjacent to the pseudostigmata) 
parallel ; they then turn abruptly inwards, just in front of 
the pseudostigmata, and finally are again parallel for a third 
of their whole length. Their edges are somewhat irregularly 
sinuous. There is a slight fold of the integument, bowed 
forwards, immediately in front of their anterior ends, and a 
similar fold at the base of the rostrum curved in the same 
sense but pointed in the middle. Between the lamellae, in a 
line with the pseudostigmata, is a pair of elevations similar 
in character to the lamellae and of very irregular form 
bearing the interlamellar sets. The pseudo-stigmatic organs 
are slender, strongly curved forwards and inwards, with 
short fusiform heads tipped with a short seta. 
Fore margin of dorsum straight in the middle, chitinized 
and brown, forming a rim which is shortly decurrent on the 
dorsum on the inner side of the humeral hair (which is rather 
longer and more conspicuous than usual). Two series of 
dorsal hairs. 
Claws monodactyle. 
In moss, Muggleswick Common, Durham (R. S. Bagnall). 
D. TRICARINATUM Paoli. 
D. FALLAX Paoli. 
Both of these species occurred pretty freely in moss and 
humus sent to me by Mr. Bagnall from Holywell Dene, near 
Whitley Bay. The former is not infrequent in the upper 
parts of the Tyne basin in both counties. 
Naturalist, 
