Hydrachnellae 



279 



Eylaidae Leach, 1815 



Figures 197, 198 



Diagnosis: These mites have a weak skin which usually lacks scle- 

 rotic shields. The maxillary organ has a large mouth disk surrounded 

 by a fringe. The chelicerae are separated from one another, are large 

 basally, tall dorso-ventrally, and 

 have a small claw. The palpi are 

 usually long and richly haired. 

 The coxal plates are arranged in 

 four groups of two each and the 

 tarsal claws are simple. Placed in 

 capsules the eyes are connected 

 with one another by a sclerotized 

 bridge and lie dorso-medianly 



Figure 197 Eylais desecta Koenike. 

 Eve plates of female. (After Marshall 

 1927) 



Figure 198 Piersigia koenikei Viets. 

 Dorsum. (After Viets 1936) 



forming "spectacles," or if the eyes are lateral they are on the margin 

 of a many-segmented plate. 



Genus and subgenera: 



Eylainae Claus, 1880 



Eylais Latreille, 1796 



a. Eylais s. str. 



Type. Hydrachna extendens Miiller, 1776 



b. Capeulais Thor, 1 902 



Type. Capeulais crassipalpis Thor, 1902 



c. Meteylais Szalay, 1934 



Type. Eylais hamata Koenike, 1897 



d. Pareylais Szalay, 1934 



Type. Eylais setosa Koenike, 1897 



e. Proteylais Szalay, 1933 



Type. Eylais degenerata Koenike, 1897 



