78 



Acarology 



Chandler, W. L. and D. S. Ruhe. 1940. Pneumonyssus caninum n. sp., a 



mite from the frontal sinus of the dog. J. Parasitol. 26(1) : 59-70. 

 Doetschman, Willis H. 1944. A new species of endoparasitic mite of the 



family Halarachnidae (Acarina). Trans. Amer. Micro. Soc. 63:68- 



72. 

 Newell, Irwin M. 1947. Studies on the morphology and systematics of the 



family Halarachnidae Oudemans 1906 (Acari, Parasitoidea). Bull. 



Bingham. Oceanogr. Coll. 10(4) :235-266. 

 Vitzthum, H. G. 1931. Pneumonyssus simicola Banks. Z. Parasitenk. 4: 



48-74. 



Entonyssidae Ewing, 1923 



Figure 59 



Diagnosis: Entonyssids are parasitic in the lungs of snakes. They are 

 oval in shape and may reach 1 mm. in length. The tritosternum is rudi- 

 mentary in the female and according to Radford 1937 is absent in both 

 males and females of E. bedfordi Radford, 1937. The dorsal plate is 



Figure 59 Entonyssus glasmacheri 

 Vitzthum, 1935. Dorsal and ventral 

 views of female. (After Vitzthum 

 1935) 



undivided and usually reaches the posterior margin. If the plate is 

 restricted to the propodosoma there will be two strong setae on its 

 posterior margin. All legs are provided with pretarsi, caruncles, and 

 claws. The chelicerae lack well-developed teeth. The forked seta on 

 the palpal tarsus bears two tines. 



The following key to the subfamilies is taken from Turk 1947, who 

 considers them to be of familial rank. 



Key to the Entonyssidae 



Chelae with movable digit falciform and fixed digit harpoon-like 

 with retrograde tooth or with both digits falciform generally with- 

 out setae Entonyssinae 



Chelae of female with weakly sclerotized, long movable digit that 

 is strongly recurved laterally and lacks teeth and setae; fixed digit 

 reduced Pneumophionyssinae 



