22 SCIENCE BULLETIN, No. 19. 



Gall elongate, cylindrical, tapering to the apex, dull reddish brown, of a 

 somewhat .similar form to that of C. amplior, springing singly frona the 

 branchlets, sessile, the basal bracts very fine, with long spiny ones above, 

 forming a calyx from which the true galls emerge : these seem to be formed 

 of six parallel ribs coalesced together into the tubular gall, tapering to the 

 apex, in which the apical orifice opens into the central cylindrical tube, 

 which encloses the female. In fresh specimens the gall appears to be clothed 

 with a grey mossy covering on the outer surface. Length variable, from one 

 to one-quarter inch, diameter one-quarter of an inch. The adult female 

 resembles that of C. amplioy, but the gall is ap])arently a verv distinct struc- 

 ture, though constructed in the same plan. 



358. Cylindrococctis casuarinae. Cat. Coccidte, p. 84. 



CylindrococcKS gracilis, Fuller. 

 Journal. West Australian Bureau Agriculture, vol. iv, p. 1346, 1897. 

 Trans. Ent. Soc. London, p. 451, pi. x, fig. 24, 1899. 



Specimens obtained upon twigs of Gasuarina humilis, near Perth, West 

 Australia. In his first reference he says : " A species which niav perhapt 

 be regarded as a variety of C. sfiniferous.'' In the second, Fuller says thas 

 " the galls are much more slender and the imbricate bracts do not project 

 so much. Length, one to one and a quarter inches, diameter one-fifth of 

 an inch." 



359. GylindrocoGcus gracilis. Cat. Coccidte, p. 84. 



Cylindrococcus spiniferuf!, Maskell (Fig. 15). 

 Trans. New Zealand Institute, vol. xxiv, p. 43, pi. x, figs. 1-7, 1891. 

 Froggatt, Agri'. Gazette N.S.W., vol. ix, p. 498, 1898. 



This is the commonest gall upon the different species of Casuarinas growing 

 in the coastal districts of New South Wales, Victoria, and South Australia. 

 The type was taken on C. qaadrivrdvis. 



Gall very variable in size and shape, often covering the branchlets with 

 their cone-shaped structures ; others on the tips of the slender branchlets 

 very fine and elongate. One specimen that I have springs directly from the 

 apex of a young seed cone. 



General form rugose, oval at base, tapering to the tip, composed of a 

 number of stout, thickset, reddish brown, leaf -like bracts ; the basal portion 

 consisting of six or more often stout angulated bracts, which sometimes 



