95 



Female larva — Second Stage(F\g. 8). — Stouter, more rounded and more convex than 

 first stage. Color red, brownish in cen- 

 ter, legs, antennaj and hairs dark brown, 

 nearly black. Antennje almost pre- 

 cisely like those of second stage of I. 

 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 siibcylindrical; 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 ai>al end, instead 

 of being louger than the enti re 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—r/i(r<Z Stage (Figs. 9 

 and 10 g and 7i ). — In this stage the insect 

 closely resembh s /. purchasi. It is red- 

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

 -, ^ \ cbaracters, 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. Antennie nine-jointed; joints 4 to 

 8 subequal 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 white, 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 iu tufts, as with the larvte of Cero- 

 plastes, and at a certain stage of growth after the 

 second molt will be noticed a median row of five 

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

 row of one to each lateral segment of abdomen. 

 In molting the skin splits down the back of tbe 

 head and thorax and the adult slowly crawls 



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

 enlarged ; d, autenna of same — still more enlarged 

 (original). 



e 



Fig. 9.—Icerya rosce: e, larva, third 

 stage— greatly enlarged ; /, antenna 

 of same— stil 1 more enlarged (original). 



