TERRESTRIAL ACARI OF THE TYNE PROVINCE 33 



1. Body black, wholly or partly ; legs more or less red 2 

 Body fuscous or whitish, legs pink ... ... ... 3 



2. Excretory aperture dorsal ... ... ... ... Penthaletts. 



,, terminal behind ... ... Halolydacits. 



,, ventral ... ... ... ... Chromotydceiis. 



3. Pedes i more than twice length of dorsum... ... JAnopodes. 



,, scarcely longer than dorsum ... ... 4 



4. Femur iv much swollen ... ... ... ,. Eupodes. 



,, not crassate ... ... ... ... Tydicjcs. 



PENTHALEUS, Koch, 1842. 



Body black, legs red. Excretory aperture dorsal. 

 Type : hcematopvs, Koch. 



I. Dorsum with long hairs ... ... ... longipilis. 



Hairs of dorsum short ... ... ... hiEviatopiis. 



58. Penthaleus haematopus, Koch. 66, 67, 68. 



Plentiful everywhere in ground moss. 



59. Penthaleus longipilis, Can. 66, 67, 68. 



Exceedingly like hcematopus, but seems lighter 

 coloured on account of the long hairs. Nearly as 

 frequent in West Allendale, but I have not met 

 with it so freely elsewhere. 



HALOTYD/EUS. Berl., 1891. 



Black marked with red, legs red. Excretory 

 aperture marginal behind. 



Type : hydrod/'oimis, B. & Tr. 



60. Halotydaeus hydrodromus, B. & Tr. 67, 68. 



General; on stones and sea-weed. 



LINOPODES, Koch, 1842. 



Legs long and slender, especially the first pair which 

 much exceed the length of the body, and are not 

 gressorial but tactile. Femur iv very slightly 

 enlarged. ,> 



Type : motaforms, L, 



c 



