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SOAR : WATER MITES OF EPPING FOREST. 
for members of any other. They are found in fresh water only ; 
for, although there are some marine mites which superficially 
appear to be closely related to this group, they are quite distinct 
and are known under the family name of Halicaridse. 
The water-mites are easily divided into groups. Some 
have the eyes close together : others have the eyes wide apart. 
Some are simply crawlers : others are powerful swimmers. 
Then there are hard skins and soft skins. It is easy, therefore, 
to split these little creatures into genera, with such marked 
characters in their external structure. 
Altogether, we have represented in the Forest twenty 
genera, including 52 species—about one-fifth of the whole 
recorded for the Britannic area. 
SUB-ORDER—HYDRACARINA. 
Family 1— LIMNOCHARIDAE. 
Genus 1— LIMNOCHARES, LATR. 
L. aquatica, Latr. 
A bright scarlet crawling mite, with eyes on a small 
chitinous plate on the median line of the dorsal surface. 
Not common in the Forest. Snaresbrook, 1899. 
Family 2 — EYLAIDJE. 
Genus 2 — EYLAIS, LATR. 
E. georgei, Soar. 
A bright red mite, soft skinned. Eyes close together 
on a small chitinous plate. A strong powerful swimmer, 
but without swimming hairs on the fourth pair of legs. 
Wake Ponds, 1899. 
E. rimosa, Pier. 
Much like E. georgei, except in the eyeplate. Wake 
Ponds, 1902. 
Family 3 —H YDRY PH A N TI DM . 
Sub-Fam.—HYDRYPH ANTING. 
Genus 3 —H YDR YPHA NTES, KOCH. 
H. ruber, de Geer. 
Common ; found in several places in the Forest. 
H. dispar, Schaub. 
Not so common as ruber. It was found at Loughton and 
Chingford, 1900-06. 
