610 BRITISH ORIBATID^. 



corners nearly right angles ; it is somewhat raised at 

 all the margins, a little depressed in the centre, and 

 being considerably thicker than the cephalothorax 

 its progaster rises almost perpendicularly from the 

 cephalothorax. Each lateral margin bears four large, 

 irregular- shaped lumps, or exaggerated papillsD ; each 

 bearing a short, stout, recurved hair, which usually 

 looks thicker than it is from the dirt sticking to it ; a 

 similar papilla, but still larger, forms each posterior 

 angle, and between these are two somewhat smaller 

 papillae, nearer to the ventral surface, and seated upon 

 a depressed margin or ridge. There are six short 

 thick hairs along the progaster, and two longitudinal 

 rows of three papillse, each on the notogaster, each 

 papilla bears a thick curved hair. 



Distribution. — The species is generally distributed ; 

 it is found in moss, at the roots, and amongst fallen 

 vegetable matter. It is remarkably sluggish and 

 awkward in its movements, both in the nymphal and 

 adult stages. It has been recorded in Switzerland, 

 Germany, and possibly in Italy. 



NOTHRUS BIVERRUOATUS,*Zbc/i. PI. XLYII A,figS. 6 — 10. 



Notlirus hiverrucatus, Koch. Heft 29, fig. 15. 



— angulatus, — Heft 29, fig. 14. 



— Iwrridus ?, Nic. P. 456. 



— — ?, Berlese. Fasc. xvii. 



Average length about 1*0 mm. 



Average breadth about '48 mm. 



Average length of legs (first and fourth pairs) about 

 '60 mm. 



Average length of legs (second and third pairs) 

 about '40 mm. 



This species may be distinguished from N. Iwrridus 

 by its larger size, the shape of its hind margin, and its 



* Bis, twice; verruca, a wart. 



