110 ASPIDIOTUS ALIENUS. 



PL II, fig. 3. Pygidium of adult female. X 250. 

 PL XII, fig. 6. Margin of pygidium of adult female. 

 X 600. 



ASPIDIOTUS ALIENUS (Newstead). 

 (Figs. 13, 14.) 



Aspidiotus alienus, Newst., Ent. Mo. Mag., S.S., vol. 

 xii, p. 81, 1901. 



Female puparium, subcircular, or irregular ovate 4 , 

 flat, convex; colour pale purple brown, margins paler. 

 Larval exuviae shining black, secretionary covering 

 dull brown, forming a central point, and concentric 

 ring above the rest. Underside brighter purple brow 1 1 , 

 gradually darkening towards apex, which is usually 

 mealy. Ventral scale rather stout, and generally 

 remains attached to the food-plant. 



Greatest diameter 2 2*25 mm. 

 ? adult pyriform. Rudimentary antennas tubcr- 

 culate, with a basal, curved, spiny hair. Parastigmatic 

 glands absent. Pygidium (figs. 13, 14) rather pointed ; 

 lobes in three pairs, of which the median pair are 

 sometimes slightly the longest, the third, broadest, 

 have the margins sloping upwards. Beyond the last 

 lobe the margin is produced into three to four (usually 

 three) equidistant, angular processes, with the margin 

 between them finely crenulated. The plates between 

 the lobes broadly bifurcate ; there is also a large T 

 divided plate at the base of the first angular process, 

 and a single short spine-like one at the base of each of 

 the other angular processes. There are two exceed- 

 ingly fine spines between the third lobe and the plate 

 succeeding it, and a much larger one in the centre of 

 the margin. Circumgenital glands in four groups. 

 Anterior laterals from eight to nine, posterior laterals 

 seven to nine. Club-shaped thickenings of the body- 



