178 RECOKDS OF THE AUSTKAI.IAN MUSEUM. 



1876 reported the matter to Parliament. In a "Bulletin of the 

 Royal Gardens, Kew/'^'' I read as follows : "It appears not im- 

 probable that the disease is identical with one which has been 

 noted in the Malaj^an Archipelago, and in the Mauritius,^'"' in the 

 Society Islands according to Professoi' Livei'sidge, and in Bahia." 



Tarsoxemus ananas, Tri/oll. 



Tarsononus ananas, Tiyon, Queensl. Agric. Journ., iii., pt. 6, 

 1898, pp. 462-464, pi. Ixxi., f. 1, 2, 5, 6. 



Tarsdui'imof anam', Banks, Proc. U. States Nat. Mus., xxviii., 

 1904, p. 77. 



Hast I'hdit. — Pine apples f A>ia)ta.'<a sy. y. 

 Hah. — 8. (^)ueeiisland. 



Faimli/ TYROGLYPHID^. 



This is anotlier small family of mites, yet notwithstanding, one 

 of great economic importance, seeing that it embraces species 

 notorious by reason of their infesting foods — cheese, cereals, 

 tubers, bulbs ; some are also found attached to living mammals 

 and insects during what is termed the hypopial stage. For 

 species in this stage three genera were proposed on the supposition 

 that they were adult Acarids. These were Hi/ixiinis, Duges, 

 Hoiiuipiis, Koch, and TricJiti(lacti/li(s, Duf. Megnin" made 

 lengthy observations on the zoological position and economy of 

 Acarids described under these generic names, and showed that 

 they were all earlier stages of cei'tain Tyroglyphid?e. The two 

 latter names were therefore di'opped, whilst the first was retained 

 and is still used as a name to distinguish these Acarids at a 

 certain stage of their development — the "nymphe cuirassee, 

 adventive, heteromorphe." 



Tyroglyphid mites are very small, pale-coloured, very soft, and 

 have usually prominent chelate mandibles and moderately long 

 legs, the tarsi terminating with one claw ; the body is about 

 twice as long as broad. The adults are certainly blind, but in 

 some hypopial foi'ms there are organs which have never been 

 satisfactorih^ defined and which may possibly be eyes. The 

 division between the cephalothorax and abdomen is invariablj- 



1-5 Michael— Bull. Roy. Gardens Kew, 1890, p. 86. 



1" Liversidge — Journ. Roy. Hort. Soc, New Ser.,ii., 189u, pp. cxxxi.-cxxxii. ; 



loc. cit., iii., 1891, pp. 14-17. 

 " Megnin— Comp. Rend., Ixxvii., 1878, pp. 129-132, and pp. 492-3. 



