152 RECORDS OF THE AUSIKALIAN MUSEUM. 



species also exist. These Acarids have an oval or elliptical body 

 with a few usually long hairs arranged in rows ; the body is 

 divided into two parts — cephalothorax and abdomen, and these 

 are separated from each other by a transverse furrow ; the 

 cephalothorax has on each side one or two simple eyes. The 

 palpi are short and terminate with a claw, the latter being 

 thumb-like and bearing one or more appendages known as "fingers." 

 The mandibles have their basal joints united in a plate ; the 

 apical joint is long and flexible, and admirably adapted for 

 piercing vegetable tissues, it is known as the stylet. Legs 

 moderately slender, furnished with scattered hairs, and armed 

 with one or two claws. In some species of the genus Tetranychu!< 

 the claw is divided into four pieces ; the body is elliptical, being 

 one and a half times as long as broad ; the first pair of legs is 

 longer than the body. 



Geitus : Brvobia, Koch, = Petrobia, Miirray. 



BrYOBIA PRiETIOSA, Koch. 



Bryohia prcetiofia et yloriosa, Koch, Uebersicht des Ai'achniden- 

 systems, 1837. 



,, speciosa, Koch, loc. cit., 1838, p. 61. 



,, nobilis, Koch, loc. cit., 1838, p. 61. 



Pefrobia sjjeciosa, Murray, Econ. Ent., London (no d.), p. 118. 



Bryohia speciosa, Crawf., Rep. on the Fusicladiums, Arc, Adelaide, 

 1886, p 49, pi. iv., f. 20, a, b, c, d, p. 



ribis, Thomas, Mt. Thur. Bot. Ver., vi., 1894, p. 10. 

 ,, speciona, Tyron, Ins. and Fungus Pests, Brisbane, 1<^89,. 



p. 9?. 

 ,. pirt'fiosa, Oudm., Tigds. Voor Ent., xliii., 1900, p. 138 



Host Flcmfs. — Peach trees, almonds, Arum maculatum. 

 Hab. — South Australia (introduced) : Europe. 



Bryobia, sp 



Bryobin, sp., Tryon, Ins. and Fungus Pests, Brisbane, 1889, p 92 



Host Flants. — Peach trees and grape vines. 

 Hab. — Queensland. 



