TERRESTRIAL ACARI OF 'I'HE 'I'VNK PROVINCE 3I 



STIGM/EUS, Koch. 1842. 



Legs short, tarsal claws 3. Cuticle not areolate. 

 Type : kermesinus, Koch. 



49. Stigmaeus elongatus, Berl. 67. 



Under stones, West Allendale, rare. 



BRYOBIA, Koch, 1842. 



Dorsum flat or concave with raised margin, pro- 

 duced in front into a 4-lobed hood. Peritreme 

 present. 



Type : pretiosa, Koch. 



50. Bryobia pretiosa, Koch. 66, 67, 68. 



Bryobia prateiisis^ Geo. 

 General and abundant, in all sorts of situations, but 

 more particularly in moss and under stones. 



TETRANYCHUS, Dufour, 1832. 



Legs rather long and slender. Palp of 4 articles. 



Ambulacrum 4-clawed. 

 Type : telarius, L. 



51. Tetranychus telarius, L. 67. 



The "red spider"; a garden pest, living gregariously 

 in a web on the leaves of plants, but probably 

 blamed for damage done by other creatures. 



52. Tetranychus pilosus^ Can. 



Dorsum with very long setae. 

 Scotland (W. Evans). 



E. — Sub-family Cheyletinae. 



Mandibles internal styliform. Legs of five articles only. 

 Palpi working horizontally. Eyes none or very inconspicuous. 



1. Legs i abnormal (with coiled claw) short ... ATyobia. 



2. ,, normal Cheyletus 



MYOBIA, Heyden, 1828. 

 Legs of the first pair short, thick with spiral claw. 



Cuticle hyaline. Parasitic on mammals. 

 Type : muscnli, Schrank 



