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GAMASUS IGNOTUS N.SP. IN LINCOLNSHIRE. 
C. F, GEORGE, M.R.CS. 
Amone the Acari the Gamasea are perhaps more often met 
with than any other species of mite. They are parasitic in 
one or other stage of their existence, and are then frequently 
found in great numbers and in very curious places. They 
are, however, often found free and very active, especially 
Gamasus ignotus 0n.sp., dorsal view Gamasus igaotus n.sp. 
x 36. Length of body 1:12 mm. ventral view. 450. 
in moss and under damp leaves, stones, etc. Though they 
shun the light they have no visible eyes. Their front legs 
are commonly the longest and thinnest, and are used as 
feelers. The body is encased in plates of chitin of ditferent 
shapes and sizes, with thinner skin between them, and these 
chitinous plates assist us in the determination of species. There 
are usually two dorsal shields (anterior and posterior), divided 
by a line or by a more or less narrow portion of soft skin 
passing transversely between them. Sometimes, however, 
there is but one dorsal shield, generally oval in shape, but 
1913 Mats Ie 
