A. C. OUDEMANS, NOTES ON ACAKI. 63 



{ Behind the genital aperture a sucker-plate ... 4 



( Behind the genital aperture two claspers .... 5 



1 All the legs equal in armature and in hairs of tarsi 

 4. I Cerophagus Oudms. 



Legs IV armed otherwise .... Trichotarsns Can. 

 Under the claspers no sucker . . Lahidophorus Kram. 

 5. \ Under each clasper a ])edunculated sucker 



Dermacariis Haller 



1 Ventral side without any suckers at all Acotiiledon Oudms. 

 Behind the genital aperture a sucker plate ... 7 

 ÌTwo eyes. . . - Histiogaster Beri. 

 No eyes 8 



All the legs slender; legs III and IV shorter and slen- 

 \ derer than I and II and usually turned forward 

 8. Anoetus Duj. 



f AU the legs equal in length, short and thick ; legs III 



and IV usually directed backward 9 



1 Epimera I absent ; sternum free . . Aleurolnns Can. 

 I Epimera I short, joined to the sternum . . . . 10 



Without vertical hairs Tip'oghjplim Latr. 



With vertical hairs Hypopus Dugès. 



I. Tyroglyphinae, adults. 



I Ambulacra normal, sessile 2 



1. 



( Ambulacra of legs I and II on long peduncles C LenUinguleae 



Mandibles normal, chelate . . . . A Tyroghjpheae 

 Mandibles saw-or knife-like. B Anoeteae 



10. 



2. 



A Tyroglypheae. 



I Female without copulation tube 2 



I Female with projecting copulation tube . . . . 19 



