Mites Injurious to Domestic Animals, 61 



FAMILY ANALGESIDAE (Feather Mites}. 



The mites of this family are closely allied both to the Sarcoptidae 

 and Tyroglyphidae, being somewhat intermediate between these 



FIG. 46. (See pp. 79-86.) 



A. Capitulum of Demodex folliculorum, from above, (a) Labial 

 sheath of chelicera. (b) Chelicera (upper finger), (c) Spinule 

 on palp, (d) Epistome. (e) Palp. B. Capitulum of Demodex 

 folliculorum, from below, (a) Labial sheath of chelicera. (b) 

 Chelicera (lower finger), (c) Palp, (d) Membranous Capitulum. 

 (e) Supposed opening of respiratory system. (f) Mouth. 

 (After Hirst, Studies on Acari, no. 1.) 



FJG. 47. (See pp. 79-86.) 

 Dorsal spinule on capitulum (palp) of Demodex spp. A. of 



D. folliculorum. B. of D. canis. C. of D. equi. D. of D. cati. 



E. and F. Spinule of D. bovis, showing variation in form. G. of 

 D. muscardini. H. of D. ratti. I. of D. arvicolae, var. musculi. 



(After Hirst, Studies on Acari, no. 1.) 



two groups. In some forms there is a lateral vesicle on each side 

 of the abdomen, as in the Tyroglyphidae. They are found chiefly 



