October, '08] JOURNAL OF ECONOMIC ENTOMOLOGY 309 



Adult Apterous Females — Plate 5, fig. 12. 



When fully mature these females appear deep shining black, but under a 

 hand lens the margins of the abdomen, the thorax and the basal portions of 

 the antennae are more or less yellowish or amber brown in color. The legs 

 are dusky yellow with distal ends of tibiae and tarsi black; cornicles black; 

 Cauda dusky brown to blackish, hardly distinguishable; cornicles straight, en- 

 larged slightly towards the base, and with distinct flange at tip. The general 

 shape of the body is very broad for the length, especially in the older indi- 

 viduals. These females are not black until after the final molt. During the 

 nymph stages they vary from very pale to rather dark yellowish brown. 



Newly Born, Viviparous Females — Plate 5, fig. 13. 



When first born the young lice are very pale, almost a lemon-yellow in 

 color, becoming darker as they gi-ow; eyes dark red; antennae, cornicles and 

 feet a little dusky. When ready to molt they measure about .70 mm. Cor- 

 nicles short, stout and with a wide flange; beak extending to a point half 

 way between hind coxae and tip of abdomen. Length of antenna, .35 to .50 

 mm.; joints one and two, short, cylindrical, joint one being much the thicker, 

 joint three about as long as one and two together; joint four short, but little 

 longer than two, and with a sensorium at distal end; joint five a trifle longer 

 than four, stout, and with a cluster of sensoria at the distal end; joint six is 

 long spindle-shaped and is about equal to three and four together; division 

 between three and four sometimes wanting. 



After first molt the lice become darker, a good salmon color, and measure 

 from 1 to 1.40 mm. in length; antennse 7-jointed and about two-thirds the 

 length of the body, distal half ])lackish, cornicles equaling tarsi in length, 

 broad at base and with wide flange. 



Winged Viviparous Female — Plate 5, fig. 14; and Plate 6, fig. 7. 



General color of body deep shining black; bases of femora, tibiae, cauda and 

 usually the eighth abdominal segment in front of it, yellowish. No lateral 

 tubercles upon prothorax or abdomen, middle ocellus rather prominent, an- 

 tennae upon slight tubercles. Length of body about 1.75 mm.; antenna, 1.80 

 mm.; cornicles, .23 mm.; the cornicles are a little stouter at base and have a 

 moderate flange; length of wing, 3 mm.; stigma yellowish; venation normal; 

 joints of antenna about as follows: three, .46 mm.; four, .31 mm.; five, .21 

 mm.; six, .11 mm.; seven, .55 mm.; cauda very small, hardly longer than 

 broad at base; joints three and four of antenna strongly tuberculate with 

 many sensoria, and joint 5 with 2 to 6 similar sensoria (Plate G, fig. 7). 

 (Continued in next number.) 



EXPLANATIONS OF PLATES 



Plate 5: Figs. 1 to 8, Aphis pomi; 1, stem-mother, first instar; 2, adult stem- 

 mother; 3, apterous viviparous female of the second generation; 4, young, 

 first instar, second generation; 5, winged viviparous female of second genera- 

 tion; 6, pupa of third generation; 7, adult male; 8, adult oviparous female. 

 Schizoneura kinigera — 9 and 10, apterous and alate viviparous females; 11, 

 the small over-winter form. Aphis persicw-niger — 12 and 14, adult apterous 

 and alate viviparous females; 13, young viviparous female, first instar; 15, 

 Chrysopa sp. and eggs; 16, Chrysopa cocoon. The enlargement in each case 

 is marked beneath the figure. This plate is from Bull. 133, Colo. Exp. Sta., 

 by Gillette and Taylor, M. A. Palmer, artist. 



