506 BRITISH ORIBATIDiE. 



writers, but I have found a few specimens of a species 

 wliicli agrees with Berlese's figure of bis iV^. Jiorridus, 

 excejjt that mine has only a single small hair on each 

 apophysis. I believe this species not to be Hermann's 

 N. horridushnt Koch's N. hiverrucatus which, I think is 

 distinct ; I have figured it under that name. Whether 

 the species with the two hairs is a variety of the same 

 I am not able to say. 



Colour brown, of median depth ; the creature, how- 

 ever, usually covers itself up with dirt to such an 

 extent that the colour cannot be seen, nor, indeed, can 

 the texture or markings ; and. if reagents be used to 

 remove the dirt they may modify the colour. 



Texture rough and dull; the whole creature is 

 thickly strewn with irregular, short, villous processes 

 of the cuticle, which are easily rubbed off, but when in 

 slut give a rough and grannlar effect. 



Cephalothorax partly hidden beneath the progaster ; 

 the part which shows from the dorsal aspect is consid- 

 erably narrower than the abdomen. Rostrum small, 

 conical, slightly truncated ; genB3 very distinct ; rostral 

 bairs diverging and almost straight. Behind the 

 rostrum the cephalothorax suddenly widens and rises, 

 forming a strong transverse edge slightly bowed for- 

 ward ; after a short distance it narrows again, being 

 deeply excavated for the insertion of the first pair of 

 legs. From immediately behind the before-named 

 transverse edge spring two large chitinous apophyses, 

 bulbous at their proximal and more cylindrical at 

 their distal ends, which, reach nearly to the tip of the 

 rostrum. Each of these apophyses bears a large thick 

 hair, closely set with short villous processes ; these 

 hairs are straight at first but curve inward at their 

 distal ends and generally cross. Pseudo-stigmata very 

 projecting, close to or partly under the progaster. 

 Pseudo-stigmatic organs very short with thin peduncles, 

 which, project but little from the pseudo-stigmata, and 

 small, almost globular heads, rough at the ends. There 

 are two curved longitudinal ridges springing from 



