SUGAR MITES. 283 



CASE Section II. 



XIV. 



Body short and more granular, with short hairs, either very- 

 plumose, or converted into flat pinnae, with transparent membrane. 



No. 21. Glyciphagus plumiger {Ftim. &^ Rob.^, (Acarus plumiger, Koch).—2\, 

 Magnified sketch of ditto, copied from M. Fumouze & Robin's figure. 



Body pale reddish-white, and flat. The larvae hexapod. 

 Nymphs octopod, but not sexed ; in other respects as in the larvae. 

 For the special details, we must refer the reader to Messrs. 

 Fumouze and Robin's beautiful memoir on this and the next 

 species in '-Robin's Journal of Anatomy and Physiology, 1868." 



Glyciphagfus plumiger. Smaller than the cheese mite. 

 Reduced from Fumouze and Robia's figure. 



Found in the soil and moist dust of the walls of cellars, especially 

 in the mouldy parts, also in stables, granaries, and the chaff and 

 dust of fodder. They are easily distinguished from the other Acarids 

 with which they live, by their slower motion, more circular form, 

 by the transparent aureole surrounding their body, caused by 

 their projecting lateral hairs, and by their smaller size. The 

 young Tyroglyphi, Glyciphagus cursor, the Sciri, the Cheyletes, the 

 Gamasi and Uropodes, which are of the same size as them, may 

 be recognised by their more rapid movements, their narrower and 

 more oval body, and by the absence of the aureole just spoken of. 



