ICERYA JEGYPTUCUM. 



249 



conical, truncate tube, of which one side is irregular, 

 being constricted near the base ; viewed in front the 

 tube is translucent. Thoracic segments occupying 

 nearly one-half the length of the body, strongly 

 defined by incisions, those of the abdomen less so, but 

 all distinctly marked. In the first stage of adultness 

 the whole smooth surface has a pellicle of white waxen 

 matter closely adherent, but easily detached, and often 

 more or less rubbed off ; eventually, as the ovisac is 

 developed, exudation of waxen and cottony matter 

 obscures the segmentation. At first there is a narrow, 

 well-defined marginal rim all round the body; after- 

 wards there is a flattened area exterior to this ; from 



a 6 



FIG. 7. Icerya xgyptiacum, Doug., $ : a, dorsal ; b, profile, x 5. 



just below it, on each side of the abdomen, is a pro- 

 jecting fringe of seven to eight distinct, contiguous, 

 stout, sinuate, tapering, waxen, snow-white, opaque, 

 fragile processes, 3-5 mm. long, much curved round 

 at the pointed ends, all, as a rule, tending downwards. 

 In one specimen, sheltered within a curved leaf, a 

 similar, but thicker, straighter, obtuse, upturned or 

 horizontal appendage also proceeds from the sides of 

 each of the thoracic segments, and two from the head, 

 the latter close together, the others wide apart. . . . 

 Close under the processes at the end of the abdomen, 

 and reaching backwards as far as their extremities, is 

 the white, broad, plump, posteriorly rounded, cottony 

 ovisac ; it then curves under the abdomen and com- 



