1000 



ox SOME NEW OR LIITLE-KNOWN ACAJU. 



Text-fisfui-e 24. 



a. lAstropnoroides eethiopicus, jren. & sp. u., <J. Ventral view. 



b. Listrophorus bothce, sp. \\., (J . Dorsal view. 



c. Ventral view of anterior extremity of 'Listrophorus hot/i(V, $ . 



d. Ventral view of posterior extremity of JJstrophorns hatha, <J . 



cJ . Leru/th (including capitulum but not long posterior hairs) 

 380 jn. Greatest width 93 /a. 



$ . Lemjtli (incliuling capitulum) 430-440 n. 



IfosL: Gerbillo, at liothaville, Orange hVeo State (6'. A. If, 

 Jkdford). 



Capauinia tiupilis Michael. 



The presence of a system of traclieal tubes in sarcoptid mites of 

 the genus Otodectes, namely in Oiodecies cynotis XAWcati and var, 

 faronis, has already been pointed out by the author (Journ. 

 Quekett Micr. Club, vol. xiv. 1921, pp. 229 & 230, text-lig. 1). 

 Tracheal tubes also occur in Ca^Jcirinia tripilis, and aie very 

 similar in appearance to those present in Otodecles cynotis. 

 A parently Otodecles and Caparinia are the only members of the 

 family Saicoptid;e possessing a respiratory system of tracheal 

 tubes ; but further investigations on this subject are necessary. 



