SARCOPTES MINOR 



33 



mm. broad. Female, 0-4 0-5 mm. long, 0*3 0-39 mm. broad. In the 

 domestic pig and wild boar ; occasionally also in man. The settlement, 

 however, is usually of short duration. 



(7) Sarcoptes scabiei, var. canis. Male, O'i9 0^23 mm. long, 0*14 

 o'i/ mm. broad. Female, 0^29 0-38 mm. long, 0-23 o'28 mm. broad. 

 In the house-dog, and also, not unusually, in human beings. 



(8 and 9) Sarcoptes scabiei, var. vulpis, and Sarcoptes scabiei, var. leonis, 

 of the fox and lion ; have likewise been observed on man. 



Sarcoptes minor, Fiirstenberg, 1861. 



Anus situated on the back, legs short, pedunculated ambulacra 

 broad ; living on cats (S. minor, var. cati) and rabbits (S. minor, 

 var. cuniculi). In cats this mite usually lives in the cervical 



FIG. 245. Sarcoptes minor, var. cati. On the left, female (lying on its abdomen).; 

 on the right, male (lying on its back). (After Railliet.) 



+ * 



region, and thence spreads to the ears and head ; it usually causes 

 the death of the infected animals ; it is easily transferable from 

 cat to cat, is difficult to transmit to rabbits, but once settled on 

 them can easily infect other rabbits. On the other hand, the 

 transmission of the itch-mite of the rabbit to the cat does not 

 succeed. In man Sarcoptes minor induces an eruption that dis- 

 appears after about a fortnight. 



The itch mites of domestic animals, which belong to the genera 

 Psoroptes ( = Dermatodectes = Dermato copies} and Chorioptes (Symbiotes = Derma- 

 tophagus}, as a rule do not infest and live on man, even when artificially 

 transmitted. It is, however, possible for this to occur. Thus Moniez 

 (Traitt de paras., 1896, p. 559) mentions that a species of Chorioptes 

 probably Ch. bovis had been found on man, as had also Demodex fotticu- 

 lorum. This author also includes Dermatophagoides scheremetewskyi, Bogdanoff 

 (Bull. soc. imp. d. natural., Moscow, 1864, xxxvii., p. 341), which has 



