26 PROCEEDINGS OF THE NATIONAL MUSEUM vol.71 



been studied and illustrated. The figures should be adequate for the 

 recognition of this stage, and no description is attempted. 



Larva (embryonic). — As mounted, nearly uniformly elliptical or 

 slightly narrowed behind, length about 393;a, width about 232ji;.; an- 

 tennae normally 6-segmented, the apical longest, the third next, 

 total length about 153/x; legs not unusual, claw long, with distinct 

 denticle near apex, both pairs of digitules well developed, attaining 

 about the same distance beyond the tip of the claw, all slightly 

 knobbed at apices, those of tarsus actually longer and about tt^ice 

 as stout as those of claw; spiracles not unusual, with a single quin- 

 quelocular pore adjacent to each, anterior with three such pores 

 leading to spiracular spines, posterior without additional pores; 

 marginal setae slender spinelike, blunt at apices; spiracular spines 

 stout, the anterior two adjacent, the posterior two well separated 

 and about half the length of the anterior, dimensions about as fol- 

 lows, but variable, anterior 7/x, posterior 4;^; with an occasional tiny 

 dorsal seta in the posterior abdominal region; ventrally, at least in 

 the abdominal region, with a submarginal row of tiny setae and a 

 submedian row of much larger setae on each side; with the 

 posterior submedian seta conspicuously larger, about 152/*; 8-shaped 

 pores present, relatively small, in longitudinal rows, at least in the 

 abdominal region, one submarginal row ventrally. 



Cotype.—Cst. No. 40370, U.S.N.M. 



This species and the other Australian species available for com- 

 parison, including convexus Froggatt, eucalypti Maskell, frenchii 

 Froggatt, and melaleucae Fuller, appear to form a legitimate group 

 within the genus, characterized chiefly by the relatively minute size 

 of the individual cribriform plates. It is not at present certain 

 that any other species may properly be associated with these. This 

 species differs from the related eucalypti of Maskell most obviously 

 through lack of the mid-dorsal bands of larger 8-shaped pores pres- 

 ent and forming a distinct cross dorsally in eucalypti^ and through 

 possession of a larger number of the much reduced cribriform plates, 

 normally seven to each longitudinal row, in comparison with a nor- 

 mal of four to each row in eucalypti. In addition, the marginal 

 setae are distinctly stouter and bluntly rounded at tips in acaeiae. 



LECANIODIASPIS ATHEROSPERMAE (Maskell) 



Plate 17, figs. 1-S ; Plate IS, figs. 1-13 ; Plate 29, fig. 1 



i?e/erences.— Fernald, Cat. Cocc. World, 1903, p. 54. — Froggatt 

 Agr. Gaz. N. S. Wales, vol. 26, 1925, p. 761. 



The Maskell collection contains two slides of " adult female, 1895," 

 one of which is well prepared, but unstained. Several additional 



