. Bulletin of entomological research. Entomology. 180 ROBERT NEWSTEAD. Larva. Anal lobes with a pair of slightly lanceolate spines; setae longer than those of the anal ring. Dorsal spines minute, similar in shape to those on the anal lobes. British East Africa : Kabete, on coffee, November 1918. " Coffee bush infected in the lab. has been killed by this scale " (F. W. Dry, for T. J. Anderson). Typical examples of %. perniciosus, N. & W., have from 5-6 pairs of lanceolate cerarian spines on the distal segments of the abdomen, with 2-3 obtusely triangular pores scattered near them;
. Bulletin of entomological research. Entomology. 180 ROBERT NEWSTEAD. Larva. Anal lobes with a pair of slightly lanceolate spines; setae longer than those of the anal ring. Dorsal spines minute, similar in shape to those on the anal lobes. British East Africa : Kabete, on coffee, November 1918. " Coffee bush infected in the lab. has been killed by this scale " (F. W. Dry, for T. J. Anderson). Typical examples of %. perniciosus, N. & W., have from 5-6 pairs of lanceolate cerarian spines on the distal segments of the abdomen, with 2-3 obtusely triangular pores scattered near them; and the body spines, though smaller than the cerarian spines, are relatively much larger, and also much more frequent than are those in the variety from coffee at Kabete. Moreover P. perniciosus is much larger, measuring from 3-4 , var. P. filamentosus. Fig. 4. Pseudococcus perniciosus, N. & W., var., $ ; a, b, dorsal and ventral aspect of the anal lobes ; c, lateral abdominal cerarii; dd, gland-pores ; e, hair of anal ring. Pseudococcus filamentosus, Ckll., $;/, gland-pores; gg, lateral abdominal cerarii. Brain * has sunk P. perniciosus as a synonym of P. filamentosus, Ckll., without giving reasons for so doing ; this action has led me to re-examine examples of the latter (part of the type lot kindly presented to me by Professor T. D. A. Cockerell in 1892) and I find that it differs to a marked degree from P. perniciosus in having very few gland-pores (fig. 4,/), relatively shorter anal lobe setae and small groups of obtusely triangular pores round the cerarian spines (fig. 4, g, g). Some of the tubular ducts of the dorsum are also much shorter and many of them are accompanied by 2-3 obtusely triangular pores. Clearly therefore P. perniciosus is specifically distinct from P. filamentosus, and the former name must be retained. * Brain, C. K. Trans. R. Soc. S. Africa, v, pt. 2, p. 99 (1915).. Please note that these images are extracted from scanned page im
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