TERRESTRIAL ACARI OF THE TYNE PROVINCE 



387 



1. Mandibles styliform, integument usually roughened... 2 

 Mandibles normal, integument smooth ... ... 3 



2. Interlamellar seta? flattened horizontal ... ... Pdops 



Interlamellar seta? normal erect ... ... ... Peloptulus 



3. Pteromorpha? fully developed ... ... ... ... 4 



Pteromorpha? imperfect or vestigial (or 0, exceptionally) Oribatula 



4. Translamella laminate ... ... ... ... ... Sphcrrozetes 



Translamella a mere linear fold ... ... ... 5 



Translamella ... ... ... ... ... ... 8 



5. Pteromorpha? strap-shaped ... ... ... ... Limnozetcs 



Pteromorpha? otherwise ... ... ... ... 6 



6. Dorsum setate ... ... ... ... ... ... MdanozitiS 



Dorsum hairless ... ... ... ... ... ... 7 



7. Lamellar cusps prolonged ... .. ... ... Ceratozetes 



Lamellar cusps simply angular ... ... ... Euzetes 



S. Lamella large broad horizontal ... ... ... Achipteria 



Lamella? small erect, or ... ... ... ... 9 



9. Pteromorpha? projecting beyond the front of dorsum. Oribates 



Pteromorpha? normal ... ... ... ... ... 10 



10. Claws tridactyle... ... ... ... ... ... Chamobates 



Claws monodactyle ... ... ... ... ... 11 



11. Sensillus porrect, horizontal or nearly so ... ... Minunthozetes 



Sensillus not porrect, upright ... ... ... ... 12 



12. Femora i with blades ... ... ... ... ... Mycobates 



Femora i without blades ... ... ... ... Zetomimus 



PELOPS, Koch. 



1. Apex of sensillus blunt ... ... ... 2 



Apex of sensillus acute ... .. ... 4 



2. Pteromorpha? black, similar to dorsum ... major 

 Pteromorphse brown ... ... ... 3 



3. Dorsal seta? blunt, slightly clavate ... acromius 

 Dorsal seta? acute ... ... ... ... pcrarniatus 



4. Posterior dorsal seta? thicker than the rest, fuligineus 

 Dorsal seta? all similar ... ... ... 5 



5. Two smooth spaces on the dorsum ... approximatus 

 One smooth space only ... ... ... farinosits 



27. Pelops acromius, Herm. 66bc, 67ac. 



General, according to Michael — which presumably is 



true for the south of England. I find it distinctly 



local. 

 Oxford, Lancashire, Scotland, Ireland. 



