62 A. r. oudemans, notes on acari. 



I Mandibles chelate 9 



1 Mandililcs saw-like XVII Lmobiiìuu' 



8 ' 



i Mandibles and maxillae (including palps) difFormed to 



sucking apparatus XYI Cytodytinae 



. Legs T and II with ambulacral caruncle, occasionally 



9. with weak claw 10 



Legs I and II without ambulacrum XV. Lamino cojytinae 



I Ambulacral caruncle of normal dimensions, or smaller 11 



10. I Ambulacral caruncle enormous, with radiating spikes 



XIV Heteropsorinae 



Ambulacral caruncles flat, circular, almost sessile. 12 



Ambulacral caruncles bell-shaped, on short peduncles; 



mandibles short; d" without posterior dorsal shield, 



11., without genital suckers . . XI. Epidermocoptinae 



Ambulacral caruncles bell -shaped, on long peduncles; 



mandibles elongate ; d* with posterior dorsal shield and 



\ with genital suckers XII. Psoroptinae 



; Larvae and nymphae with ambulacral caruncles on all 



\ the legs 13 



12. ■ 



Larvae and nymphae with ambulacral caruncles only on 



legs 1 and II XIII. Psoralginae 



Abdomen of 9 not deeply cleft . . IX Avenzoariinae 



Abdomen of 2 deeply cleft ... X. Proctophyllodinae 



( 



13. 



I Tyroglyphinae, hypopi. 



Enclosed in hypopial case, never free, rudimentary 



1. I 'xlycypliagus Hering 



Free, well developed 2 



Abdomen without sharp edges 3 



2. I Abdomen with sharp edged margins which can be 

 sufflexed veutralward 6 



