56 A, e. ou DKM A> s, NOTKS ON ACARI. 



with claw {Hypopus^ Anoetns, Saproglyphus), or only with 

 caruncle (Photia). The hypopi use larger animals as vehicle. 

 Generally living free (a few under elytra of beetles, or para- 

 sitic on birds and mammals). 



II Listrophorinae. 



Acaridae with generally elongate body (except, e. g. Myo- 

 (optes); soft parts of skin wrinkled; with anterior dorsal shield 

 and sometimes also with posterior dorsal one ; always (?) with 

 a pair of vertical hairs; mandibles chelate; maxillar trophi, 

 or one or more pairs of legs difformed to hold a hair ; palpi 

 with 4 free joints ; legs, if not difformed, 5-jointed, submar- 

 ginal; ambulacral caruncle, if present, almost sessile. Hypopi ? 

 Living on mammals. 



Ill Acarinae. 



Acaridae with semiglobular or sphaeroidal body; skin soft 

 and Avrinkled; always with anterior dorsal shield; no other 

 shields ; always with a pair of vertical hairs ; mandibles 

 chelate; maxillae with immovable palpi; legs 5-jointed, 

 always very short; legs I and II submarginal; legs III and 

 IV often submedial; ambulacral caruncle, if present, pedun- 

 culate, small. No hypopi. Living subcutaneous and borrowing 

 cuniculi on birds and mammals. 



IV Dermoglyphinae. 



Acaridae with short or elongate body; soft parts of skin 

 wrinkled ; with anterior dor.sal and generally with other 

 shields ; with a pair of vertical hairs ; mandibles chelate ; 

 maxillae with 2-jointed palpi; legs I and II marginal; legs 

 III and IV often submarginal, or even submedial ; legs gener- 



