SCALE INSECTS ('• COCCIDiE ') OF AUSTRALIA. 25 



Genus LIII. Olliffia, Fuller. 



Trans. Ent. Soc, London, p. 442, 1899. 

 Cockerell, Science, vol. iv. No. 88, p. 299, 1896. 



" The adult female is stationary, with somewhat conspicuous anal tubei- 

 cules, apparently like those of an Eriococcus, but it differs in having a chiti- 

 nosed prolongation of the dorsal arc of the anal opening between them; 

 antennae seven-jointed, atrophied; legs atrophied or absent " (Fuller). 



Olliffia eucalypti, Fuller. 

 Trans. Ent. Soc, London, p. 442, pi. xx, fig. 10, 1899. 

 The elongate adult female hidden beneath bark scales and covered with 

 fumagine. Abdomen with two blunt spined tubercules, between which 

 is the anal ring, surrounded \\ath six stout hairs ; dorsal arc produced into a 

 chitinous conical point; rostrum large; mentum three- jointed; epidermis 

 with compound spinnerets ; length, 0-04 inch. 



Found on Eucalyptus sp., at Perth, West Australia. 

 362. Olliffia eucalypti. Cat. Coccidse, p. 85. 



SUB-FAMILY VI. —Tachardinae. 



The coccids comprised in this division are the lac-producing insects of 

 commerce, of which Tachardia {Coccus) lad is the type. The females secrete 

 a quantity of wax-like secretion, commonly known as lac, enveloping the 

 naked fleshy coccids in a more or less regularly formed structure. The male 

 test is small and shaped like a lady's slipper. The female coccid is furnished 

 with an anal ring with numerous bristles; she is an irregularly rounded 

 fleshy creature, with a pair of tubular appendages on the dorsal surface, 

 once known as lac tubes, but now considered to be breathing tubes. 



This is a group small in number of species, but well represented in Australia 

 by several fine species. 



