36 



STUDIES ON ACAEI. 



<J . Body abont 4| times as long as width of cephalothorax. 

 Abdomen only slightly longer than cephalothorax 4- capitulum. Spines 

 on capitulum seemingly more slender than in male of var. tmisculi. 

 Male sexual orifice placed above the second pair of legs. 



Author's measurements : — 



Host : Several female examples and a single mala collected by the author from 

 specimens of the Bank Vole (Evotomi/s glareolus hritannicus), trapped at Teignmouth and 

 near Exeter, Devonshire, September 1918, 



11. DEMODEX CUNICULI, PEeiffer, 1903. 



Acarus folUculorum cuniculi, Pfeiffer, Berlin tieriirztl. Woclienscbr. 1903, pp. 155 

 & 156. 



(Plate XII. fig. 51.) 



(J . Body about foiir times as long as the width of the cephalo- 

 thorax. Abdomen a little longer than cephalothorax-fcapitulum. 

 Capitulum about as wide as, or only slightly wider than long; spines 

 on its dorsal surface smaller than in male of I), musculi. Male 

 sexual opening rather far back, being situated between the second 

 pair of tiny tubercles on the dorsal surface above the (ventral) 

 transverse groove between the second and tliird legs. Penis fairly 

 long and slender. 



Author's measurements : — 



Host: Two adult males from tame rabbits {Oryctolagiis mnicxilug). 

 KoTE. — Possibly only a variety of D. arvicol ce. 



