June. 1903] Coleman: Coccid.e of the Conifer.*:. G9 



middle, gradually flattening out posteriorly; color of larval skin lemon yellow, first 

 and second skins light brown with translucent edges ; ventral scale formed by a turn- 

 ing in of the lateral edges of the 2d scale, sometimes completely 'enclosing the insect. 



Adult Female (Plate VI, Fig. 16). — The color of the female is transparent, 

 yellowish-white, abdominal segments yellowish ; length about I mm., width .4 mm.; 

 elongate oval, head flattened anteriorly, thorax cylindrical, with flattened and very 

 conspicuous marginal lobes. Abdominal margin flattened, and with the following 

 characters (Plate VI, Fig. 16, a'). There are no groups of spinnerets, but a large 

 spinning gland opens into each incision and there are several near each lateral margin 

 of the caudal segment, as there are also several on the lateral margin of each body 

 segment ; the median lobes are well developed, rounded, with a slight lateral notch, 

 the second pair are double, about equally developed, of about the same shape as the 

 median, but smaller, the third pair are also double, but the outer ones are smaller 

 than the inner ones, of the same shape and appearance as the second pair, but smaller; 

 the first pair of plates are situated near the inner margins of the median lobes, are 

 rather conspicuous, and have about five points, the second pair are between the median 

 lobes and the first incision, are somewhat less conspicuous than the first and have 

 about four points, the third pair are between the second pair of lobes and the second 

 incisions, are of about the same size as the second pair, and also have four points ; 

 there are five deep incisions on either lateral margin, situated as follows : Between 

 first and second pairs of lobes, between second and third pairs of lobes, a double one 

 just laterad of the third pair of lobes and a single one a considerable distance above 

 these. The spines are inconspicuous except the median pairs ; they are situated as 

 follows : on both dorsal and ventral margins, between median lobes, laterad of 

 median lobes, laterad of each of the second pair of lobes, laterad of each of the third 

 pair of lobes. 



After impregnation the body of the female becomes much swollen and of a dark 

 brown color. It also becomes much elongated and the lateral lobes of each segment 

 are almost obliterated as the young develop (Plate VI, Fig. 17). 



77/1? Yoiiug Larva (Plate VII, Fig. 18). — The young larvae, which are de- 

 veloped in the body of the female, are at birth about .4 mm. in length, about .2 mm. 

 in width, of truncate-oval form and milk-white color. Antennae (Plate VII, Fig. 18, «) 

 .08 mm. long, 6-segmented, formula, 6, 5 (3, l) (4, 2) ; several long hairs on the 

 sixth segment, a few shorter ones on each of the outer segments. The legs (Plate 

 VII, Fig. 18, i^) are rather short and stout, femur very stout, tibia and tarsus slender, 

 claw long and slightly curved, with a pair of knobbed hairs dorsally and a pair of 

 digitules ventrally. 



Female Larva, First Moult. — After the first moult the larva takes the form of the 

 adult female and begins the construction of its scale, to the anterior part of which the 

 larval skin is attached. The scale when complete, is of the same general appearance 

 and color as that of the adult and about one third as long. 



Female Lan<a, Second Moult. — At the second moult the larva does not change 

 in form, but is considerably larger. It begins a new scale, which when completed, 

 serves as its permanent home as described for the adult female. 



Scale of the Male (Plate VII, Fig. 19). — The scale of the male consists of the 

 first larval skin and one scale, which is of the same light brown color as that of the 

 female. Length about 2 mm. (larval skin .4 mm.), width about .8 mm.; straight, 



