Signoret, 1869a
Appearance in life
Scale cover of adult female elongate and narrow, covered with more or less crumbly, pure white wax, with apical exuviae. Scale cover of immature male similar to that of female but smaller.
Morphology
Adult female pupillarial; body elongate, membranous except for small sclerotized patches on the pygidial dorsum; free abdominal segments only slightly lobed laterally. Pygidium with 1-4 pairs of small marginal lobes, median lobes separated by a good space; pygidial plates present or absent, slender and spiniform or sometimes fimbriate. Dorsal ducts, if present, confined to pygidium, quite small, each orifice with a sclerotized rim; abdominal disc pores present in five perivulvar groups, supplementary submarginal groups often present on segments just anterior to pygidium; anus situated near the centre or in the basal half of the pygidium. Preygidium never with plates, if duct tubercles present then they form submarginal groups on the posterior segments of the prepygidium; stigmatic disc pores loosely clustered by anterior spiracles only, often with small ducts crowded laterally to them, in some species some or all of these ducts opening in tubercular processes; antennae each with 2-6 setae.
Second instar female similar in shape to adult female. Pygidium with two pairs of short, broad lobes, rounded or flat apically, sometimes with a single notch on either side of each lobe. Short, broad, fimbriate plates present, two between median lobes and two between median and second lobes on either side. Pygidial macroducts not reduced in size, present marginally and dorsally. Duct tubercles present on thorax and abdomen. Exuviae enlarged and quite thickly sclerotized.