rKRKF.STRIAL ACARI OF THE TYNE PROVINCE 71 



3. Base of the process rhomboid, apex shortly plumose longispinosus. 

 No rhomboid base, apex not plumose ... ... longuliis. 



4. Femur iv (^) spurred ... 5 



Spurs only on the second leg ((^) ... ... ... 6 



5. Patella iv ((J) spurred ... ... ... ... siiperbus. 



Patella iv (^) not spurred .. ... ... ... gladiator. 



6. All the dorsal setae simple curved acute ... ... 7 



Humeral setae, at least, clavate ... ... ... 8 



7. Basal branches of epistome apically bifurcate ... pisentii. 



,, ,, simple ... . . ... glaber. 



8. All the dorsal setse clavate ... ... ... ... tridentinus. 



Setse of the middle of dorsum simple or ... ... 9 



9. Tarsus iv with about 8 clavate plumose setae ... plitmipes. 



,, without clavate setse ... ... ... marginatiis. 



113. Macrocheles gladiator, sp. nov. 67. 



Length 1,080 /x. Pale yellow-brown. Epistome similar 

 to that oi pliunipes, as is also the dorsal chaetotaxy 

 (nearly all the set^e clavate and minutely plumose) ; 

 otherwise very different from that species as the 

 ventro-anal scutum of the $ is very large and semi- 

 circular, while the male has on femur iv a large 

 curved acute spur with a blunt branch at its base. 



Ninebanks, in manure. 



114. Macrocheles superlms, sp. nov. 1800 //,. 



Body parallel-sided behind the shoulders then much 

 narrowed. In this posterior region the dorsal 

 scutum leaves a wide margin. Setae few, all 

 clavate. Ventral shield reticulate, sternal not 

 reticulate. Femur iv and patella iv each with an 

 acute spur. No plumose setas on tarsus iv. 



Lancashire (Grange — Bagnall). Yorkshire (East 

 Riding, W. Falconer). 



115. Macrocheles marginatus, Herm. 66, 67, 68. 



A large and common species, conspicuous by the 

 contrast of the dark dorsal shield with the very 

 white body-margin which surrounds it. 



