30 PROCEEDINGS OF THE NATIONAL MUSEUM tol. 71 



The obvious differences between this insect and its nearest relative 

 among the Maskell species, Z. acaciae, have been pointed out under 

 the discussion of that species. 



LECANIODIASPIS MIMOSAE (Maskell) 



Plate 22, figs. 1-17 ; Plate 23, figs. 1-13 ; Plate 29, figs. 3, 4 



Beference.~FeYna.\d, Cat. Cocc. World, 1903, p. 55.— Brain, Bull. 

 Ent. Res., vol. 10, 1920, p. 116. 



The Maskell collection contains three slides of this species, one 

 of " adult female, 1896," one of " male pupa, 1896," and one of "larva, 

 1896," none of which are at all good. There is a small quantity of 

 unmounted material under No. 533. Supplementary slides have been 

 prepared from this, and the following redescription is based chiefly 

 on these, with reference to additional South African specimens from 

 other sources. 



Adult female. — See Maskell and Brain references for description 

 of test and of external appearance of the female ; body, as mounted, 

 short elliptical, length about 3.2 mm., width about 2.7 mm.; derm 

 membranous throughout; antennae fairly well developed, normally 

 9-segmented, the terminal three with stouter, curved, sensory setae; 

 legs present as tiny stubs or perhaps entirely wanting sometimes; 

 spiracles set well in from margin, the disk pore bands corre- 

 spondingly elongate; beak short conical, 1-segmented; marginal 

 setae rather slender, about 18/a long, few in number; anterior spi- 

 racular spines present, relatively elongate, and slender, approxi- 

 mately equal in length, about 62/i, long, the ends often clavate, but 

 variable; pore band from posterior spiracle split and diverging, but 

 the spines apparently normally lacking, from the few specimens 

 examined; with a few small, slender scattered dorsal setae perhaps 

 10 IX long, with similar small scattered ventral setae, more numerous 

 and larger in the genital region, the long pairs before the anal com- 

 plex poorly developed, only about 36/x, long; with numerous small 

 8-shaped pores distributed nearly uniformly over the dorsal surface, 

 becoming larger and more crowded at the margin, but not forming 

 a distinctly set-off marginal band, also continued onto the ventral 

 surface, but again as small pores, as far towards the middle line as 

 the spiracles; tubular ducts numerous dorsally, slender and quite 

 elongate, somewhat more abundant towards margin; multilocular 

 disk pores in seven rows or bands across the ventral surface of the 

 abdomen, the posterior bands containing numerous pores, the anterior 

 very attenuated, obscure, including relatively few, scattered pores, 

 these all normally with 10 loculi; spiracular disk pores normally 

 quinquelocular, forming a single band from anterior spiracle to 

 margin, but a branched or diverging double band from the pos- 



