ANNULOSA. 



61 



Sub-ord. 3. Acarida. 



Fam. a. Dermatophilidse. Demodex. 



Fam. 6. Sarcoptidse. Sarcoptes (Itch-mite). 



Fam. c. Acaridse. Acarus. 



Fain. d. Gamasidse. Gamasus. 



Fam. e. Ixodidse. Ixodes (Tick). 



Fam. /. Trombididse. Tetranyclms. 



Fam. g. Hydracbnidse. Limnochares,If'i/drachna(Wa.ter- 



mites). 



Fam. h. Oribatidse. Oribates. 

 Fam. i. Bdellidse. Bdella. 



(Leuckart, Ban und Entwiclcelungsgeschichte der Pentastomen, Leipzig, 

 1860 ; Doyere, Memoire sur les Tardigrades, Ann. des sciences nat., 1840 ; 

 Nicolet, Histoire iiaturelle des Acariens, Archives du Mus., 1855 ; Clapa- 

 rede, Studien iiber die Acariden, Leipzig, 1868 ; Pagenstecher, Beitrage 

 zur Anatomic der Milben, Leipzig, 1860-61.) 



. I, > 



Fig. 56. Acarina. A, Tegeocranus elongatus, enlarged 65 times. B, Ixodts ricinus, one of 

 the Ticks, greatly enlarged, c, Mouth-organs of a Tick (Ixodes albipictus), enlarged ; I, La- 

 bium ; m, Mandibles ; mp, Maxillary palpi. (After Michael, Packard, and Cuvier.) 



ORDER III. ADELARTHROSOMATA. 

 Sub-ord. 1. Pbalangidea. 

 Fam. a. Phalangiidse. PJialangium (Harvest-men),0^i7z'o. 



