DESCRIPTIONS OF GENERA AND SPECIES. 265 



second legs are pectinated, and tlie first pair of tibiae 

 have each a spike instead of a hair on the inner side. 



The Nymph and Larva. The older nymphs re- 

 semble the females, but the palmate hairs are smaller 

 and narrower in proportion. The bursa is, of course, 

 absent ; the skin is even more wrinkled, and the colour 

 is lighter. The younger nymphs and the larvae have 

 the hairs scarcely palmate at all, only pectinated ; their 

 disposition is rather more like those of the male, but 

 the pair of long hairs are absent. 



The Egg is a long ellipse about *1 mm. long, and 

 about "05 mm. broad. 



Habitat. The creature is usually found in the dust 

 of the walls and the saw-dust of cellars. I have also 

 found it in stables in the fodder. I have found it in 

 Warwickshire and Cornwall ; it has been recorded in 

 France, Italy, Germany, etc., and is not uncommon; 

 where found at all it is usually abundant. 



G-LYCYPHAGUS PLATYGASTER,* Michael. PL XIV, and 

 PL XVII, figs. 14 



Glyciphagus platygaster, 1886. Michael, " On some Undescribed 

 Acari of the Genus Glyciphagus found 

 in Moles' Nests," in ' J. Linn. Soc.,' vol. 

 xix, p. 275, pi. xxxiv, and pi. xxxv, 

 figs. 1-5. 



1898. Berlese, * A. M. S. Crypt.,' p. 106. 



1S99. Kramer, Thierreich,' Lief.7, p. 145. 



Female. Male. 

 Average length about . . -76 mm. '54 mm. 



breadth about 



length of legs, first pair, about 

 second pair, about 



,, third pair, about 



,, fourth pair, about 



66 

 35 

 32 



38 

 46 



44 

 32 

 25 



28 

 41 



A very remarkable and conspicuous species. 



Colour when just emerged pure white, afterwards 

 cream-white to parchment colour, becoming almost 

 pink near the lateral and anterior edges. The male 



* riXa'ri/f, broad ; ya<rr/p, the abdomen. 



