302 ARACHNOIDEA, 



CASE almost the entire body in patches or spots. The smell was re- 

 pellant, and the patient suffered from an incessant and extreme 

 itching. Itch mites were found in the crust, but never in the 

 substance of the skin. Two attendants who applied dressings to 

 the patient were attacked, and their symptoms were at first those 

 of the common itch. One was speedily cured by sulphur baths. 

 The other was still under treatment, six weeks after the entrance 

 of the original patient, and symptoms of lichen and prurigo were 

 showing themselves in addition to the regular furrows of the itch. 



Sarcoptes vulpis {Ftcrst). 



Obtained from an infected fox in the island of Rugen ; has 

 slight differences of the same nature as in the preceding species. 



Sarcoptes capr^e {Furst.). 



Differs slightly from S. scabiei in the same way as the preceding. 



Sarcoptes squamiferus {Furst.), (S. suis, Gerl., and S. canis, Ctrl.). 



Found on the sow and the dog, still very like the S. scabiei, 

 and with the same number and disposition of hairs and spines, &c. 



Sarcoptes cati {Hering and Gerlach), (S. cuniculi, Gerl., and S. minor, 

 Ftcrst.), — 6. Magnified sketch of male. 



On the cat and the rabbit. The species is a good deal smaller 

 than the Sarcoptes scabiei. The thorns or spines on the back 

 begin to alter ; on the, thorax they are absent, or turned into 

 hairs, and there are now only twelve thorns on the back of the 

 .abdomen. 



Both in the cat and the rabbit this parasite takes the head as 

 its point of attack, and more particularly the base of the nose, 

 the lips, the ears, and the eyes. Even when the animal is 

 inoculated elsewhere by putting the mites upon other parts of the 

 body, and after they have actually taken possession and begun to 



