368 JOL'RXAL OF ECONOMIC ENTOMOLOGY [Vol. 1 



Apterous Oviparous Female— Plate 9, fig. 4. 



Specimens taken by Mr. Geo. P. Welclon at Delta, Colo., October 26, 1908, 

 ou leaves of apple trees. 



The general color varies from a dull green to bright pink or even dark 

 salmon, with the numerous minute dusky spots characteristic of this species. 

 The dorsal surface is more or less mottled in many of the specimens due to 

 the ova which show through. The head is noticeably dusky brown in color; 

 anal plates and a transverse dash on the eighth abdominal segment, the tarsi, 

 distal ends of the tibiae, eyes, and distal half of the antennae black or black- 

 ish; antenna 6 or 7-jointed; cornicles slightly dusky; color beneath about 

 the same as above except that it is a little lighter; length of body 1.35 mm.; 

 antenna, .51 mm.; joints: III, .10; IV, .07; A^ .08; VI, .07; VII, .12 mm.; 

 no sensoria on antenna except the usual ones at the distal ends of joints 5 

 and 6 (or 4 and 5 in those that are 6-jointed). When there are but 6 joints, 

 joints 3 and 4 are united. 



Winged Male. 



Specimens from red clover, Ft. Collins, November 2, 1906. 



The general color is light yellowish brown; head, thorax, cornicles, an- 

 tennae, distal end of beak, coxae, tarsi, distal ends of femora and tibiae, eyes, 

 mesothorax below and a large spot on either side of the mesopleurum black; 

 style, anal plates, a row of spots on the lateral margins of abdomen, about 

 six transverse dashes on the abdominal segments above, dusky brown to 

 black ; length of body about 1.70 mm. ; length of wing 2.20 mm. ; length of an- 

 tennae 1.40 mm.; joints of antennae as follows: I and II, .11 mm.; Ill, .41 

 mm.; IV, .26 mm.; V, .21 mm.; VI, .12 mm and VII, .29 mm; style .10 mm.; 

 cornicles .07 mm. The cornicles are cylindrical in form and are about twice 

 as long as broad; joints three, four and five of the antennae strongly tubercu- 

 late, with numerous circular sensoria; on joint III about 30 to 40; IV, 15 

 to 18 ; V, 8 to 10 : Plate 9, fig. 7. 



EXPLANATION OF PLATE 



Plate 9. — Aphis haJceri; 1, stem-mother; 2, apterous viviparous female; 3, 

 alate female; 4, oviparous female; 5, the 5-jointed antenna of the stem- 

 mother; 6, antenna of alate viviparous female; 7, antenna of male. Fig- 

 ures 1, 2, 3 and 4 are enlarged 30 diameters; figures 5, 6 and 7, 80 diameters; 

 M. A. Palmer, artist. 



Figures 3 and 5 were used in Bulletin 133 of the Colo. Exp. Sta. 



Errata: On i>late 6, figure 4, for alate read apterous. 



