TERRESTRIAL ACARI OF THE TYNE TROVINCE 35 



One at least I have found to possess fully 

 developed external genitalia, but it is so exceed- 

 ingly fragile that I have never been able to make 

 a satisfactory mount. 



. West Allendale : adults rare. 



64a. Rhagidia muscicola, sp. nov. 314 /x. 67. 



Pure white. Carapace as broad as long (iio/x.) 

 Posterior setae 6, straight, two long (65;u,), two a 

 little shorter (40/A), and two lateral, very short. 

 Subscapular bristle solitary. Legs of first pair 

 with the middle joints thickened. 



In moss from a pinewood at 800 feet, West 

 Allendale. 



65. Rhagidia haiophila. Lab. 68. 



Budle Bay, pretty frequent. Light orange yellow. 



Ireland, Lancashire. 



TYD/tUS, Koch, 1892. 



Body oval, legs short. Fixed finger of mandibles 

 straight : usually on plants. 



Type : foliorunt, Schrank. 



1. Dorsum finely granulate ... ... ... ... granosus. 



Dorsum quite smooth ... ... ... ... 2 



2. Colour red ; posterior setae 6 short ... ... roseiis. 



Yellowish ; posterior setse 4, the middle pair long folionim 



66. Tydaeus foliorum, Schr. 67. 



On trees, shrubs, and herbage generally ; also very 

 commonly in hay refuse. Usually pale yellow. 



Distribution quite general though records are wanting. 



67. Tydaeus roseus, sp. n. 190 /x. 67. 



Oval, but almost truncate behind; widest (120 /x) 

 just behind the transverse furrow. The anterior 

 part of the dorsum is not indented laterally. The 

 transverse furrow is curved backwards in the 

 middle, and has the usual scapular bristle near 



