. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. ooO''^^. THE WOOLLY WHITE-FLY. 67 Unless molested or crowded each female deposits her eg^s in a com- plete circle (PI. IV, fio;. 2), she beino^ always on the inside (fi<r. 19, c). This arrangement she effects by using her mouth j)arts as a j)ivot upon which to rotate her bod3\ Since often as many as 3 or 4 rows of eggs are present in one circle, it is evident that the female dc^scribes several circles while ovipositing before seeking a new place. Although as few as 27 eggs have been counted in a single circle
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. ooO''^^. THE WOOLLY WHITE-FLY. 67 Unless molested or crowded each female deposits her eg^s in a com- plete circle (PI. IV, fio;. 2), she beino^ always on the inside (fi<r. 19, c). This arrangement she effects by using her mouth j)arts as a j)ivot upon which to rotate her bod3\ Since often as many as 3 or 4 rows of eggs are present in one circle, it is evident that the female dc^scribes several circles while ovipositing before seeking a new place. Although as few as 27 eggs have been counted in a single circle and as many as 130 in a circle of 4 rows, it is probable that the larger number does not indicate the maximum egg-laying capacity, which, in the case of A. citri, has been found to be 222. The eggs are whitish when dej)osited but soon turn to a dark-brown or blackish color and become partially covered by waxen secretions rubbed from the bodies of the adults. They are curved, the concave side being upward (fig. 19, a, h), and in hatching the membranes rupture along the median distal half of the upper surface and do not spring back into place after the larva has escaped. The larva after hatching crawls about before settling. It is yellowish, elliptical, with <i^ ^ ^c? 9 pairs of marginal spines and 4 pairs of short, stout, dorsal s{)ines. Soon after ceasing to crawl, it develops a short, incons])icuous, marginal wax fringe similar to that of the r J. • ,x f A 7, V /fi ^^'^' ^^-"The woolly white-fly {Aleyrodes howardi): a, nrst instar or nUOVfera (tig. Egg, showing attachment to leaf; b, eggshell, viewed 20). In the second instar from above; c,female depositing eggs in a circle, c, Much ,1 • I 1 • ii I . enlarged; a, 6. highly magnified. (Original.) the margmal bristles are lost except one anterior and two posterior pairs, and the legs become unfit for locomotion as is the case with other aleyrodids. During this instar there develop 6 white abdominal cross-bands
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