24 PROCEEDINGS OF THE NATIONAL MUSEUM tol. 71 



disk pores adjacent to spiracles apparently normally trilocular; no 

 other pore or duct types observed; anal region, so far as can be 

 determined, quite undeveloped, no definite ring, no lobes, no stout 

 setae, and so on, probably as in casuannae. 



Cotype.—C?it. No. 40369, U.S.N.M. 



The material on which this redescription has been based is so very 

 scant that the description must be regarded as tentative only. There 

 are even some apparent discrepancies between the "tail" and the 

 spiracles as sketched from the Maskell slide and from a cotype speci- 

 men received through Cockerell, and drawings from both are there- 

 fore presented. Aside from the difference in habit, as described by 

 Maskell, this species and the genotype are distinguished very readily 

 by the shape of the " tail," as was noted when casuarinae was rechar- 

 acterized (reference cited under genus). 



Genu^ LECANIODIASPIS Targioni-Tozetti 



With five species out of a total of about 33 described, Maskell's 

 contribution to this genus is of some importance, particularly as 

 the species were derived from widely separated localities — Australia, 

 Southwestern United States, and South Africa. The described 

 members of the genus are at present so poorly organized that little 

 more than suggestions can be offered as to the actual relation of 

 Maskell's species to the other species of Lecaniodiaspis. 



LECANIODIASPIS ACACIAE (Maskell) 

 Plate 15, figs. 1-13 ; Plate 16, figs. 1-28 ; Plate 28, fig. 6 



References. — Fernald, Cat. Cocc. World, 1903, p. 54. — Froggatt, 

 Agr. Gaz. N. S. Wales, vol. 26, 1915, p. 760. 



The Maskell collection contains four slides of this species, one of 

 " adult female, 1892," two of " 2nd stage females, 1892," and one 

 of " larva, 1892." Unfortunately, all of these mounts are poor and 

 the specimens considered to be second stage females are in reality late 

 larvae. Besides, there is a quantity of unmounted material under 

 No. 233 from which supplementary mounts have been obtained, and 

 additional mounted specimens from material received from Australia 

 through other sources have also been examined. 



Adult female. — See Maskell and Froggatt references for descrip- 

 tions of test and of external appearance of insect; body of female, 

 as mounted, more or less distinctly broader than long, probably due 

 to permanent distortion at oviposition, length about 2.5 mm., width 

 about 2.6 mm.; derm entirely membranous except for •appendages 

 and anal structure; antennae present, about half developed, more 

 or less distinctly 3 to 5 segmented, length about 80/i, width about 



