294 



Acarology 



Oxinae Viets, 1926 

 Genera and subgenera: 



1. Oxus Kramer, 1877 



a. Oxus s. str. 



Type. Oxus ohlongus Kramer, 1879 



b. Pseudoxusi:\\ox, 1901 



Type. Pseudoxus integer Thor, 1901 



2. Frontipoda Koenike, 1891 



Type. Hydrachna musculus Mliller, 1776 



3. Gnaphiscus Koenike, 1898 



a. Gnaphiscus s. str. 



Type. Gnaphiscus setosus Koenike, 1898 



b. Gnaphoxus Thor, 1913 



Type. Gnaphiscus (Gnaphoxus) ekmani Thor, 1913 



Atractideidae Thor, 1902 



Figures 222, 223 



Diagnosis: In the atractideids the ventral shield is entire while the 

 dorsal shield is divided into several plates by sutures. In general the palpi 

 are small; the palpal femur and tibia frequently have spines or cones on 



Figure 222 Atractides sierrensis Mar- 

 shall. Venter of male. (After Marshall 

 1943) 



Figure 223 Atractides sierrensis Mar- 

 shall. Dorsum of male. (After Mar- 

 shall 1943) 



the inner margin. Coxal plates i lack a median suture and are united; 

 a suture separating coxal plates ii and in is more or less lacking and 

 coxal plates iv posteriorly and outwardly are not well separated from 

 the ventral shield. The legs have no swimming hairs and the tarsal 



