A SYNOPSIS OF AUSTKALIAN ACAKINA — KAIM'.OW. 101 



Genni) PsoKOPTES, CTfiri: 

 PsoROPTKS EQUi, Iln-iuji. 



Psoroptes eqiii, Hering, N. Acta. Ac. Leup., x\iii., lf^3iS, p. 5^5, 



p]. xliii., f. 1, 2. 

 Sarcoptes equi, Heriiig, loc. cif. 



Dermatodectes equi, Gerl., Kratz., 1857, p. 90, pi. iv. 

 Psm-optes longirostris, vav. equi, Megn., Paras., 1880, p. 191, pi. 



xiii. 

 Psoroptes equi, Caiiest., Prcsp. Acarof., \i., 1894, p. 761. 

 Psoroptes comniuitis var. equi, Neum., Parasites and Parasitic 



Diseases of Domesticated Animals, 1892, pp. 126-129, f. 73-79. 

 Dermatocoptes eqxd, Fiirstenb., Kratz., 1861, p. 220, pis. 12-15 



Hosts. — Horse, ass. 



Hob. — Cosmopolitan ; Australia (introduced). 



Genus Chorioptes, Gerv. 



? CnoRioPTES ovis, Raill. 



? Chorioptes ovis, Raill., Zool,, 2nd ed., 1893, p. 675. 

 Chorioptes symhiotes, var. ovis, Raill., loc. cit. 



Host. — Sheep. This species is, I believe, C. ovis of Railliet. 

 The form occurring in Australia was introduced on sheep from 

 America. The species included in this genus are restricted in 

 their attacks to certain parts of the animal, as the feet, the ears 

 or neck. In this State the feet ai-e attacked, and give rise to 

 what is known as " foot mange." Cases of this trouble are, how- 

 ever, few and far between. 



Hah. — Europe?, America?, Australia (introduced). 



Family ERIOPHYID^. 



The family, although including only a few genera is rather 

 extensive in point of species. Only one form has, so far, been 

 recorded from Australia — Eryophes pyri, Scheuten, and this 

 is parasitic on the pear. All the species are of strictly 

 phytophagus habits, and many of them cause galls to 

 form on the leaves of their food plants. The early history 

 of the study of these animals is interesting. Some indi- 

 viduals in the old school of botanists regarded Eriophyd galls 

 as Crytogams, and described them as such under the generic 

 names Erinium, etc. These gall mites are an exti'aordinary 



