104 INSECTS NOXIOUS TO AGRICULTURE. 



SUBDIVISION IV. MONQPHLEBID^E. 



Adult females active or stationary ; naked, or covered with 

 mealy, cottony, or waxy secretion ; segmented ; antennae 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 antennae of eleven joints ; covered 

 with thin mealy secretion or with cotton ; stationary ; with or 

 without ovisac. Rostrum and mentum present. Segmentation 

 inconspicuous. 



Adult males without tassels on the abdomen ; antennae with 

 two dilations on each joint. 



Two species only of this genus are at present known, the 

 one described below and another, /. 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. ICERYA PURCHASI, Mask ell. 



N. Z. Trans., Vol. XI., 1878, p. 221 ; Vol. XVI., 1883, 

 p. 140; Vol. XVII., 1884, p. 30; Vol. XIX., 1886, 

 p. 45. 



TJie " 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 011 

 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, 



