182 liECORDS OF TMK AUSTHALIAN MUSEUM. 



eyen nor stigmata ; the legs are usually short and stout, and 

 arranged in two distinct groujDs ; the limbs have five joints, are 

 provided with a few rather long hairs, systematically arranged, 

 and eacli terminates with a rather large concave sucker, known 

 as the aiiihidacrum ; sometimes only one tarsal c\elw is present, 

 and sometimes two. The mandibles are usually chelate, and 

 finely toothed at the tip. The upper surface of the body is pro- 

 vided with a series of stiff bristles, and these present helpful 

 specific characters. In dealing with the preceding family refer- 

 ence was made to the method of coition of the Tyi'oglyphida? and 

 Analgesidfe, so that the matter need not be referred to again 

 liere. The development and life history of this famih' is not 

 well understood, but some species, at any rate, are known to pass 

 througli a hypopial stage. The egg is described as being large, 

 elongate, slightly curved ; the newly liatched larva has usually 

 six legs, but some forms occur in which only four are apparent. 

 Although the nymph has the general form of the adult mite, it 

 lacks tlie genital organs. 



(tcuhh Freyana, Haller. 



Sub-Genus Eufreyaxa, Cawst. d' Kraiii. 



Freyana (E.) tarandus, Troaea. <(■ Xcu))i. 



Frei/cma I E. ) tarandus, Troues. ct Neum., Bull. Sci. France 

 Belgique, 1888, xxix., p. 333, pi. xxii., f. 1 and 2. 



Hosts. — Ibis ntdanocepJiala, Lath., /. strietipenuis, J. Gd., /. 

 itiolucca, Cuv., and Tlwristicus vielannpis, Gm. 



Rab. — India ; Moluccas, Australia, and Patagonia. 



Sub-Genus Michaelia, Troues. 

 Freyana (M.) caput-medus.e, Troues. 



Freyana ( M. ) (-aput-medusa, Troues., Bull. Soc. Angers, xvi., 



1886, p. 100. 

 Michaelia caput-meduseB, Troues. it Neum., Bull. Sci. France 



Belgique, xix., 1888, p. 374. 



Hosts. — Sula bassana, Linn., and other species of the same 

 genus. 



Hab. — Australia, New Zealand, Europe, N. America. 



