*26 SCIENCE BULLETIN, No. 19. 



Genus LIV. Tachardia, Hlanchard. 



Zooligie M dicale, vol. 1, p. 3, 1886. 

 Signoret, 187(5. Maskell, 1897. 



The typical form of this genus is the hie insect Coccus lacca, described by 

 Kerr in 1782. In 1874, Signoret formed the genn^'Carteria for the lac-forming 

 coccids, and was followed by Maskell and other writers ; but finding afterwards 

 that the name had been previously used for a group of crustaceans, he dis- 

 carded it, and reverted to Blanchard's later name. The adult females are 

 enclosed in a more or less regular shaped mass of waxy resinous secretion, 

 sometimes bubble-shaped, pointed, rounded and ribbed, or simply an irregular 

 mass. The test of the male coccid, on the other hand, is usually in all the 

 species shaped like a slipper, and formed of a similar waxy resin. The 

 female coccid is an irregular wrinkled reddish rounded creature, with a pair 

 of lac tubes standing out on either side of the ventral surface, which Green 

 considers are air tubes, the tip of the abdomen useially forming a kind of peg. 



Some twenty-four sj^ecies have been described, six of which are peculiar 

 to Australia : the others from the southern parts of North America, Mexico^ 

 West Indies, Brazil, Africa, a.nd India. 



Tachardia acaace, Maskell. 

 Tra»s. Xciv Zealand Institute, vol. xxiv, p. .56, 1891. 

 Targioni, Cant. I'elude Gotn. laques, p. 121, 1893. 



This species was obtained by the collectors on the Elder Exploring Expedi- 

 tion in Central Australia upon an undeternrined species of Acacia : " The 

 female coccids," Maskell says, " excreting a quant ty of light red or pinkish 

 resinous matter, aggregated in masses or in detached irregular pieces." The 

 female of the usual globular form, but the extremity much less hairy and the 

 tubes much shorter than in T. m el ale Hcae, with the tip of the abdomen divided, 

 bearing two spines. 



607. Tacliaidia acacia. Cat. Coccidae, ]). 12-3. 



Tac/iardia aiu/idata, Froggatt (Fig. 16). 

 Pro. Linnein Society, S.S.W., vol. xxxvi, p. 154, 1911. 

 This remarkable species has onlv been found in two localities down 

 the south coast of New South Wales, at Eden and Milton. In both 

 cases upon quince trees, in neglected orchards. The waxy secretion of 



