162 Acarology 



Lociistacanis trachealis Ewing lives in the principal tracheae and 

 air sacs of grasshoppers, all stages being found in this habitat. The 

 mites probably obtain nourishment by piercing the walls of the tra- 

 cheae and air sacs and sucking the blood of the host. The body of the 

 female, when gravid, extends to several times its former size. The eggs 

 are laid in the tracheae; the female sometimes contains six to eight 

 fully developed eggs and many more in different stages of development. 



Rejerences: 



Ewing, H. E. 1924. New tarsonemid mites (Order Acarina, family Tar- 

 sonemidae). Proc. Ent. Soc. Wash. 26(3) : 66-69. 



Rovelli, G., and B. Grassi. 1888. Di un singolare acaride, Podcipolipiis 

 reconditus, nobis. Bol. Soc. Ent. Ital. 20:59-63, PI. XV. 



Volkonsky, M. 1940. Podcipolipiis diander, n. sp., acarien heterostygmate 

 parasite du criquet migrateur {Locusta migrator ia L.) Archiv. Inst. 

 Pasteur Algerie 18(3) :321-340. 



Wehrle, L. P., and P. S. Welch. 1925. The occurrence of mites in the tra- 

 cheal system of certain orthoptera. Ann. Ent. Soc. Amer. 28(1) :35- 

 44. 



Scutacaridae Oudemans, 1916 



Figure 108 



Diagnosis: The dorsal plates of the female 

 are divided into tergites, the anterior plate cov- 

 ering the gnathosoma like a roof. These mites 

 are usually round and flat. Female leg iv is 

 elongated and may or may not have claws 

 which end in strong setae. 



Figure 108 Sciitacarus inediocritarsus Vitzthum. 

 Venter of female. (After Vitzthum 1925) 



Genera: 



1. Scutcicarus Gros, 1845 (= Disparipes Michael, 1884) 



Type. Acariis acarorum Goeze, 1780 {— Scutcicarus femoris Gros, 

 1845 = Disparipes bombi Michael, 1884) 



2. Acarapis Hirst, 1921 



Type. Tarsonemus woodi Rennie, 1921 



