66 Mites Injurious to Domestic Animals. 



FIG. 53. 



(a) Penis of Demodex cati. (b) Early larva of D. bovis. (c) Tip of 

 penis of D. bovis, very greatly enlarged, (d) End of same as it 

 appears when protruding from sexual orifice, (e) Penis of D. bovis, 

 showing its entire length. (After Hirst, Studies on Acari, no. 1.) 



FIG. 54. 



Anterior end of Dermanyssus (p. 87), showing chelicerae in situ. 

 (After Hirst, Journ. Zool. Res., 1916.) 



