TERRESTRIAL ACARI OF THE TYNE PROVINCE 



47 



13a, Trachyuropoda excavata, VVasm. 



With Lasius spp. Notts and South of England 

 (Donisthorpe). 



14. Trachyuropoda trogtiloides, C. & F. 



T. lamellosa, Halbert. 



Ireland, with Lasius flavus and L. niger. 



15. Trachyuropoda wasmannmna, Berl. 



See Donisthorpe's British Ants for this and other 

 myrmecophiles. 



16. l^-achyuropoda bostockii, Mich. 



The largest of the red Uropods. Usually with 

 Lasius umbratus. 



Lancashire (Ainsdale-R. S. Bagnall). 



URODINYCHUS, Berl., 1903. 

 Type : carinaius, Berl. 



1. Dorsum obovate ; smooth and unpunctured 

 Dorsum wide, elliptical or oval 



2. Dorsum not pitted ... 

 Dorsum pitted 



3. Bay-coloured, shining, uniformly convex 

 Gray and dull, with longitudinal ridges 



4. Dorsum studded with scaly hairs ... 

 Dorsum without scaly hairs 



5. Dorsum rosy pink ... 

 Dorsum usually brown 



6. Four stout setas in a transverse row on dorsum 



behind 

 No such setse preseut 



7. Dorsal pitting spare and coarse 



, cainpomolendi^ius. 



4 



kranicrii. 



miimsaihis. 



janetii. 



5 



roseiis. 



6 



thorianns. 



7 

 ovalis. 

 ., fine and dense ... ... ... punctatissimus. 



17. Urodlnychus kramerii, Can. 66, 67. 



In barn and stable refuse chiefly, often in countless 

 myriads, like small reddish brown seeds. 



Lancashire. I have no other record, but no doubt 

 it is similarly abundant elsewhere. 



