376 Acarology 



are thicker (legs iii are even much longer). Both sexes have a bell- 

 shaped caruncle on a short, unsegmented stalk. The male has adanal 

 copulatory suckers. 



Genus: 



Psoralges Trouessart, 1896 



Type. Psoralges libertiis Trouessart, 1 896 



Discussion: These mites were found in the fur of Tamandua sp., a 

 mammal. The larvae and nymphs live in colonies in subcutaneous 

 bladders, causing a kind of itch; the adults live free among the hairs 

 of the host. No figure is known. 



Listrophoridae Canestrini, 1892 



Figure 305 



Figure 30y Chirodiscoides caviae 

 Hirst. Venter of male. (After Hirst 

 1922) 



Genera 

 1. 



Diagnosis: The dorsal shields 

 vary in number and shape. Parts 

 of the skin are smooth, wrinkled, 

 have transverse striations, or are 

 scaly. A pair of vertical setae is 

 present. The maxillae, parts of the 

 legs, or the entire leg or sternal 

 formation are transformed into 

 clasping organs that enclose a 

 single hair of the mammalian 

 host. The body is oblong (except 

 Myocoptes) and often strongly 

 compressed laterally, and has 

 vertical setae. There are genital 

 suckers (some exceptions) and 

 the males have adanal copulatory 

 suckers that may be very incon- 

 spicuous or even lacking. 



Listrophoriis Pagenstecher, 1861 



Type. Listrophoriis leuchcirti Pagenstecher, 1861 



Alabidocarpiis Ewing, 1929 



Type. Lcihidocarpiis niegcdonyx Trouessart, 1895 



