104 INSECTS NOXIOUS TO AGRICULTURE. 
Suspivision I[V.—MONOPHLEBID. 
Adult females active or stationary ; naked, or covered with 
mealy, cottony, or waxy secretion ; segmented ; antennze of ten 
or eleven joints; anterior pair of feet similar to the rest ; 
anogenital ring without hairs ; anal tubercles inconspicuous. 
Males with facetted eyes and no ocelli. 
Strictly speaking, the wings of the males of this group 
should, according to its name, present only a single nervure. 
This, however, is not the case, or, rather, it should be said that 
the nervure is precisely similar to that of all other Coccids, 
branching once, so that it cannot form a distinctive character. 
Possibly the name of Monophlebus was originally given by Leach 
to an abnormal or imperfect specimen. 
Genus: ICERYA, Signoret. 
Adult females having antenne of eleven joints ; covered 
with thin mealy secretion or with cotton ; stationary ; with or 
without ovisac. Rostrum and mentum present. Segmentation 
imconspicuous. 
Adult males without tassels on the abdomen ; antenne with 
two dilations on each joint. 
Two species only of this genus are at present known, the 
one described below and another, J. sacchari, infesting sugar- 
canes in Mauritius. The male of the latter is unknown.  Pos- 
sibly researches in Australia might result in the discovery of 
others. 
65. Icrrya Purcnast, Maskell. 
IN. Z. Trans., Vol. X19, 1878, sp: 2215 Voli AVL, Uses: 
p: 140; Vol. XVII; 1884, p. 30> Wolk 3 1386. 
p. 40. 
The “ Cottony-cushion Scale.” 
(Plate XIX.) 
Adult female dark reddish-brown, covered with a thin 
powdery secretion of yellowish meal, and with slender glassy 
filaments ; stationary at gestation, and gradually raising itself on 
its head, lifting the posterior extremity until nearly perpendicular, 
filling the space beneath it with thick white cotton, which 
gradually extends for some distance behind it in an elongated, 
