95 



Female i^arv a— Second Stage (Fig. 8).— Stouter, more rounded and more convexthan 

 first stage.* Color red, brownish in cen- 

 ter, legs, antennae and hairs dark brown, 

 nearly black. Antennae almost pre- 

 cisely like those of second stage of /. 

 purchasi ; they are relatively much 

 shorter than in the newly-hatched 

 larva ; joint 1 short and stout, as broad 

 as long; joint 2 as long as 1 but not 

 quite so wide ; 3 as wide as 2 and twice 

 as long ; 1, 2, and 3 subcylindrical; 4 

 and 5 short, rounded, each shorter than 

 2; joint 6 large, as long as 2 and 3 to- 

 gether, irregularly ovate in shape with 

 a slight concavity on the outside; 

 hairs much shorter than in first stage. 

 The long bristles around the margin of 

 the body are proportionately shorter, 

 those of the thorax quite as long and 

 stout as those of the abdomen, the ab- 

 dominal ones having also lost some- 

 thing of the pronounced upward arch. 

 The ones toward the anal end, instead 

 of being longer than the entire body, as 

 in the first stage, are about one-third 

 the length of the body. The hairs on 

 the back are still sparse, but the secre- 

 tory pores are scattered. The legs are 

 proportionately shorter. 



Female Larva — Third Stage (Figs. 9 

 and 10 g and h). — In this stage the insect 

 closely resembles /. pui'chasi. It is red- 

 der in color and not so hairy, but the antennae are identical, and it possesses the other 



characters, except that the secretory pores are 

 sparser and it does not bear the cylindrical lipped 

 pores from which extrude the glassy filaments 

 which become so prominent in this stage of /. 

 purchasi. The shape is broadly elliptical, moder- 

 ately convex. Antennae nine-jointed; joints 4 to 

 8 8ub(!qual in length and nearly as broad as long; 

 2 and 3 broader and considerably longer ; 9 as long 

 as 7 and 8, together but not broader. The lateral 

 hairs are as in the previous stage, but relatively 

 shorter, and many other lateral hairs have grown 

 out to an equal length. The w'hite, waxy secre- 

 tion is dense and completely covers the body, the 

 black hairs projecting through it and forming a 

 fringe around the body. The secretion first makes 

 its appearance in tufts, as w^ith the larvie of Cero- 

 plastes, and at a certain stage of growth after the 

 second molt wnll be noticed a median row of five 

 or six tufts, a subdorsal row of four, and a lateral 



Fig. 9.-lcerya rosce: e, larva, third ^«^ '^^ «"^ *« ^''^^^ ^'^*^^^^ segment of abdomen, 

 stage-greatly enlarged; /, antenna I^ molting the skin splits down the back of the 

 ofsame— still more enlarged (original), head and thorax and the adult slowly crawls 



Fig. 8. — Icerya rosce: c, larva, second stage — greatly 

 enlarged ; d, antenna of same— still more enlarged 

 (original). 



