THE COCCIDAE OF SOUTH AFKICA— III. 197 By Chas. K. Brain, M.Sc, M.A., Division of Entomology, Pretoria, South Africa. (Plates XII-XVI.) CONTENTS Genus Cryptaspidiotus Chrysomphalus Pseudaonidia Parlatorea Aonidia Gymnaspis Howardia Fiorinia Diaspis Subgenus Aulacaspis „ Epidiaspis Chionaspis Series . Key to Subgenera . Genus Chionaspis . PAGE. 197 198 205 212 214 218 219 221 222 225 228 229 229 230 Genus Cryptaspidiotus, Lindinger. Like Aspidiotus, except that the adult $ remains enclosed in the skin of the 2nd stage, with the exception of the pygidium, which extends through the hind part of the enclosing skin, beyond the posterior margin of the 2nd stage female (fig. 114). 97. Cryptaspidiotus austro-africanus, Lindg. (Plate xii, fig. 114). A. austro-africanus Lindinger, Jahrb. Hamb. Wiss. Anst., xxvii, p. 505, 1910, and xxvii (3), p. 41, 1911. The $ of this species makes conical depressions in the stems of its host-plant. The body of the insect is thus below the general surface and is covered by the scale, which is generally level with, or slightly below, the surrounding plant tissue. Female scale flat, + circular, whitish grey or yellowish, with + central exuviae which are darker yellow. Scale about 1 mm. in diameter. Adult $ enclosed in the 2nd stage skin,"pear-shaped, almost colourless, with rounded yellowish pygidium. Pygidia of 2nd stage and adult as illustrated in natural position (fig. 114). Circumgenital glands 0. Second stage $ : P ls L 1; 2P, 2 , L 2 , 2P 3 , L 3 , 3-5P 4 . Adult : P 15 L 15 P 2 , L 2 , L,.
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