20 BRITISH TYROGLYPHID7H. 



In 1886 two papers appeared * relative to three very 

 remarkable species of Glycyphayns, viz. G. platygaster 

 and G. dispar, which were previously unknown, and 

 G. Crameri, of which only the hypopial nymph was 

 previously known. These three species were all in- 

 habitants of moles' nests; without, apparently, being 

 parasitic upon the mole ; except that G. Crameri in the 

 hypopial stage utilises the mole as a means of con- 

 veyance, in the same way as other Hypopi do other 

 creatures. The principal contents of these papers will 

 be found incorporated with this book under the heads 

 of the respective species. 



In January, 1889, was published a paper (read in 

 May, 1888) t in which for the first time the rudimen- 

 tary hypopial stages of the ordinary species of Glycy- 

 phagus, such as G. spmipes and G. domesticus, were 

 recorded as the result of somewhat lengthy investiga- 

 tions into the life-histories. The subject is interesting, 

 these being the only rudimentary hypopial stages 

 known. 



In 1893 the last of my papers on any of the Tyro- 

 glyphidae appeared. J This paper instituted the genus 

 Lentungula, now the sole genus of a sub-family. The 

 few creatures composing it are the only known marine 

 or brackish-water species of the Tyroglyphidae, and 

 are quite exceptional in the formation of the ambulacra 

 of the anterior legs. 



Dr, G. Haller, in 1880, published his only paper 

 which need be noticed here, although others from 

 his pen will be found in the bibliography, and although 



* " On some Undescribed Acavi of the genus Glyciphagus found in 

 Moles' Nests," in 'Journ. Linn. Soc., Zoo!.,' vol. xix, pp. 269284. 

 "Upon the Life-history of an Acarus, one stage whereof is known us 

 Labidophorus talpse, Kramer," 'J. R. Micr. Soc./ ser. 2, vol. vi, 

 pp. 377390. 



f " Researches into the Life-histories of Glyciphagus domesticus and 

 G. spinipes," in 'Journ. Linn. Soc., Zoo!.,' vol. xx, pp. 285 298. 



" On a New Genus and Species of Acari found in Cornwall," in 

 'P. Zool. Soc. London,' March, 1893, pp. 262-267. 



" Zur Kenntniss der Tyroglypheii und Verwandten," * Z. wiss. 

 Zool.,' Bd. xxxiv, pp. 255. 



