THE COCCTDAE OF SOUTH AFRICA — II. 127 



Body of adult 9 (mounted) small, about - 75 to 1 mm. long, broad pear-shaped, 

 hyaline, except the mouth-parts and tip of the pygidium, which are yellow. Antennal 

 tubercle small, narrow, comparatively longer than usual, with one long spine, which 

 is almost straight and about twice the length of the tubercle. Parastigmatic glands 

 absent. The pygidium (fig. 94) is pointed ; it has one well developed pair of lobes 

 and two other pairs which are rudimentary. L x large, normally about as long as 

 broad, median space short, parallel-sided, but the lobes appearing to converge owing 

 to the outer margins curving slightly outward. There is always a deep outer notch 

 at almost half their length and occasionally an obscure inner one. L 2 and L 3 rudi- 

 mentary, sometimes represented by a small conical, hyaline, projection from the 

 broad base; but most commonly this is apparently absent or lost to view in the 

 process of mounting. 



Circumgenitai glands few in number, in 4 groups : 



0—4 0—4 usually 1—2 1—2 



0—3 0—3 „ 1—2 1—2 

 Formula : P x , L 1; 2P 2 , L 2 , 1-3P 3 , L 3 , 1-3P 4 . 



Habitat : This scale is now recorded from all four Provinces of the Union. It 

 was first described from specimens on pear, but is more commonly a privet scale. 

 It is known to infest Acacia horrida, Acer, alder, almond, apple, apricot, ash, Berberis, 

 Ceratonia, Cotoneaster, Crataegus, fig, Gleditschia, grape vine, hibiscus, ilex, lilac, 

 pear, persimmon, plum, poplar, privet, quince, Rhus, pepper, and willow. 



Collection No. : B.191. 



81. Aspidiotus (Diaspidiotus) ehretiae, sp. nov. (Plate vi, fig. 98). 



Scale of adult § about 2 mm. in diameter, almost circular, greyish buff to brownish 

 grey in colour, but often obscured by fragments of bark from the host-plant. The 

 margins are depressed and the central portion raised, almost conical, with the highest 

 portion occupied by the covered exuviae. The portion of the scale covering the 

 second exuviae is smoother than the remainder of the secreted scale and the pale 

 brown exuviae are slightly visible. In the centre is a small greyish or slate-coloured 

 area, with a central white dot surrounded by a distinct shining ring of opaque white. 

 This ring is particularly prominent in the young and male scales. Ventral scale 

 white, extremely delicate, remaining attached to the host-plant. 



Male puparium about 1 mm. long, and 0"6 mm. broad, of similar colour to that 

 of the the 9 scale. 



Adult $ (from dry material) resinous brown, chitinous ; when mature (mounted) 

 large, 1"7 mm. long and T4 mm. broad, becoming highly chitinised from the anterior 

 end backwards. Old females, after the eggs are laid, are entirely chitinous, of a deep 

 yellow-brown colour. In young specimens the body is hyaline, except the mouth- 

 parts, chitin bands of the pygidium, and the lobes and median part of the pygidium 

 immediately, behind them. Antennal tubercle with one moderately long spine. 

 Pygidium with a basal row of transverse chitinous bands and two lateral ones, one 

 on each side. Abdominal segments not prominently produced but broadly rounded ; 

 margin with a few hairs. Anus small, set well back from the lobes. The pygidium 

 (fig. 98) is pointed. There are two pairs of lobes ; but in specimens which have not 



