A SYXOPSIS OF AUSTRALIAN ACARINA — RAIXBOW. 153 



Ohs. — Tryon considers tins furni distinct from Koch's species 

 as determined by Crawford, and although he describes it, refrains 

 from giving it a specific name. 



Genus Tetranychus, Diif. 



Tetranychus telarius, Linn. 



Tetranychus telarius, Linn., Syst. Nat., x., 1758, p. 616. 



Acarns telaritis, Linn., loc. cit., p. 616. 



Teiranychus telarius (Linn.), Oliff., N. S. Wales Agric. Gaz., ii., 

 1891, p. 778. 



Tetranychus telarius (Linn.), French, Journ. Agi'ic. Vict., iv., 

 1906, p. 125. 



Host Plants. — Pear, plum, cherry, roses. 



Ohs. — This pest has been frequently referred to for many ye;irs 

 past in our puljlic press. Doubtless several species have been con- 

 fused. 



Hah. — Albuiy, Cootamundra, Temora; Australia (introduced), 

 widely distributed; Cosmopolitan. 



Tetranychus telarius, var. cinxabarinus, Boisd. 



Tetranychus telarius, var. cinnaharinus, Boisd., Ent. Hort., 1868. 

 p. 88. 



Hah. — Australia (introduced). 



Ohs. — This form is peculiar to plants in conservatories. It was 

 originally recorded as parasitic on Dracwna australis. Boisduval 

 states that when it hatches from the egg "it is then green or 

 yellowish-green ; later it is variegated with black and green ; 

 after its last change of skin, it becomes a beautiful aurora red in 



colour It carpets the underside of the Dracsena with 



threads of silk on which it walks like a spider. It does a great deal 

 of harm to the leaves that it sucks, stopping their vegetation and 

 causing them to become diseased. It is not difficult to destroy 

 them ; to do so it is sufficient to place them in a cold house 

 during two or three days." 



Hah. — Australia (introduced). 



French — Journ. Agric. Vict., iv., 1906, p. 125. 



