Cœlostoma zælandicum. a, adult female, dorsal aspect; b, adult female, ventral aspect; c, waxy tests of females of second stage on twig of Muhlenbeckia; d, female of second stage, dorsal aspect; e, female of second stage, ventral aspect, with anal tuft of cotton and seta; f, larva, with yellow mealy secretion; g, eggs, in cottony mass; k, antenna of female, second stage; l, foot of female, second stage; m, antenna of adult female; n, spiracle and trachea of female; p, anal extremity and "honeydew" organ of larva and female of second stage.
N.B.—The foot of the adult female is shown in Plate I., Fig. 6.
A. D. WILLIS, WANGANUI, N. Z.
W.M.M., delt. ad. nat
PLATE XX.
Plate XXI.
Fig.
1. Cœlostoma zælandicum. a, male insect; b, abdomen of male; c, foot of male; d, hairs and marks, abdomen of male; e, antenna of male; f, circular marks, abdomen of male; k, abdominal spike and penis of male; m, haltere of male.
2. Cœlostoma wairoense. a, male insect; b, head of male, upper side, with facetted eyes; c, foot of male; d, circular marks, abdomen of male.