THE GENUS DEMODEX. 19 



Host. Distribution. 



8. D. muscardini Hirst . . Dormouse (Mnscardiiius England. 



avellanaritcs). 



9. /). erminea, sp. n. ... Stoat (Alustela erminfci). „ 



10. D. ai'vicolce Zschokke . . Field Vole ( Microtus 



\_Arvicola^ iigreslis). Europe. 



Z). arvicolft var. musculi House Mouse {Mas mus- — 



Oudemans. cuius). 



£>. arvicoJce var. ajmdemi Field Mouse (Ajjodemus England. 

 Hirsr. ii/hatints). 



D. arvicohe var. glareolt, liankYoh.(livotomi/s(/lareo- „ 



var. nov. lus britannicns). 



11. I). canicuU FitiiSer . . . R;ib!)it {Oryctolajus cuni- „ and China. 



cuius). 



12. D. ratll Halm Brown Rat {Ratlus nor- Europe. 



vegiciis). 



13. D. soricinus Hirst . . . Black Hat (Rnltus rattus) England. 



and Brown Hat {Rattus 

 norvfficus). Shrew {Sorex 

 araiieus castaneus). 



The following three fornis of Bemodex have not been seen by the author: — 



14. D. caprcK Eailliet .... Goat {Capra Jiirctis). Europe, 



10. />. f«-f t Prietsch .... Sainbar Deer (C«rvM« sp.). Loc. ? 

 16. D. phi/llostomatis Jjey dig . 'Bat(Phi/llostomahastatum). Surinam. 



Demode-v is also known to occur in the Barbary Ape, in the Fox and Siberian Marmot, 

 but the forms concerned apparently have not been described. 



Order ACAEI. 

 Suborder V E R M I F O 11 M I A P R O S T I G M A T A. 



Family DEMODICID^. 



Genus DEMODEX, Owen, 1843. 



1. DEMODEX FOLLICULORUM, G. Simon, 1843. 

 (Plate 1. figs. 1-3 J and Plate III. figs. 12, 14, 15.) 



Acarus follicuhrum, G. Simon, Arch. Anat. Physiol. Med. 1843, p. 218. 



Demodex f., Owen, Lect. Invert. Anim. 1843, p. 252. 



Macrogaster platypus, Miesclier, Ber. Ges. Basel, 1843, vol. v. p. 191. 



Siinonea follioulorum, Gervais, Ins. Apt. 1844, vol. iii. p. 282. 



Entozoonf., Wilson, E., Phil. Trans. Roy, Soc. 1844, p, 305. 



Steatozoonf., lb., On Diseases of the Skin, 1847. 



D. hominis, Leydig, Arch. Naturg. 1859, Jahrg. i. vol. xxv. p. 235. 



c2 



