226 Acarology 



Pseudocheylinae Tragardh, 1950 

 Genera: 



1. Pseudocheylus Berlese, 1888 



a. Pseudocheylus s. str. (= Rhagina Womersley, 1935) 

 Type. Pseudocheylus biscalatus Berlese, 1888 



b. Anoplocheylus Berlese, 1910 



Ty^Q. Pseudocheylus {Anoplocheylus) europaeus Bqv\q?,q, 1910 



2. Neocheylus Tragardh, 1906 



Type. Neocheylus natalensis Tragardh, 1906 



3. Stigmocheylus Berlese, 1910 



Type. Stigmocheylus brevisetus Berlese, 1910 



4. Tarsocheylus Berlese, 1904 



Type. Tarsocheylus paradoxus Berlese, 1904 



Heterocheylinae Tragardh, 1950 

 Genus: 



Heterocheylus Lombardini, 1926 



Type. Heterocheylus fusiformis Lombardini, 1926 



Discussion: This is a small family consisting of only a few described 

 species. A single species has been described from the United States, 

 Pseudocheylus americanus (Ewing) , which was taken under the bark of 

 a hard maple tree at Urbana, Illinois. Another species, Pseudocheylus 

 biscalatus Berlese, was collected under the bark of trees in Paraguay 

 and Brazil in South America. Neocheylus natalensis Tragardh is from 

 damp moss, Natal, South Africa. Pseudocheylus protea (Womersley) 

 is from moss, Australia. The other genera are represented by species 

 from soil, moss, humus, and rotten debris in Italy. The family as a 

 whole appears to be predaceous, with the exception of Heterocheylus 

 which is an ectoparasite of arthropods. 



Reference: 



Tragardh, I. 1950. Description of a new species of Heterocheylus Lom- 

 bardini from Africa, with notes on the classification of the Pseudo- 

 cheyletidae. Ent. Tidskrift 71, hft. 2:104-110. 



Anystidae Oudemans, 1902 



Figure 170 



Diagnosis: Of red or reddish color, the anystids are medium-sized 

 mites from 0.55 to 1.35 mm. long. They have a soft integument and 



