370 



MR. STANLEY HIRST ON 



width of cephalothorax 29 /j, of abdomen 30 /j, length of 

 capitulum 18 /.i, its width 17 p : . The short wide form measures 

 as follows: — Total length 103 fi, length of cephalothorax + 

 capitulum 56 Atr©f abdomen 47 n, greatest width of cephalothorax 

 35 /i, of abdomen 36 ju, length of capitulum 15 p, its width 15 /i. 



Host. Water-rat {Arvicola amphibius) ; two male specimens 

 collected by the author from freshly-killed examples of this 

 mammal (July 1919). 



Text-figure 13. 



Highley del 



Demode.v taljpce. 



A. Dorsal view of female. B. Ventral view of male. 0. Penis greatly enlarged. 



Note. — The sexual orifice of the male is really dorsal in position and 

 the penis situated in the median line. 



Demodex TALPiE, sp. n. (Text-fig. 13.) 



5 . Body about four times as long as the width of the cephalo- 

 thorax. Cephalothorax usually rather narrow in front, becoming 

 a little wider posteriorly. There is a well-defined longitudinal 



