The Coccidae of Ceylon Volume 3-4

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 Excerpt: ...becoming brownish with age, the whole scale turning brown after death. Eyes back, conspicuous during life. Anal operculum dark brown. After gestation, a mass of white cotton-like matter is secreted from the ventral area and pushed out from the margin. The insect then rests on a cottony cushion (fig. 3) which projects on all sides, and is eventually recurved over the margin. Ovisac profuse, highly convex, white, cottony, with an inconspicuous median furrow. Derm cells (fig. 15) large, approximate, irregularly oval or circular; usually conspicuous in preparations from fresh material, but often very indistinct and difficult to demonstrate in old, dried material. Antennae (fig. 13) eight-jointed, third joint longest. Usual formula: 3, 2. (4, 5), (1, 8), 6, 7; but in some examples the fourth is markedly shorter than the fifth. Legs well developed, tarsus about two-thirds length of tibia; foot (fig. 14) with four digitules, the tarsals stout and dilated at extremity. Margin (fig. 12) closely set with stout ha1rs, which are strongly dilated and dentate at extremity. Stigmatic cleft with three stout spines, of which the median is much the longest, curved and projecting beyond the margin. Valves of anal operculum (figs. 6-11) variable in form and relative proportions of base and outer edge, but the base is usually the shorter. This variation is noticeable even in individuals from the same communities, and is particularly marked in some examples from myrtle, of which no two individuals were identical in this particular. Figs. 10 and 11 represent the extremes of this series. Anogenital ring with eight hairs. Length of insect averaging 3 to 350 mm., but exceptionally large examples have reached 5 mm. Ovisac measuring 45o to 7 mm. in length. Some examples from myrtle, w...