Deeembei-, '08] JOURNAL OF KCOXOMIC ENTOMOLOGY 367 



4 if G-jointed) is the large sensorium which commouly occurs upon joint 



5 in the aphididti^ ; length of cornicle .11 mm., stout, tapering, largest at base. 



Apterous Viviparous Female — Plate 9, fig. 2. 



Specimens from clover. Ft. Collins, June 23, 1908. 



General color pale yellowish or greenish yellow, with a slight tinge of pink 

 or light orange, especially in the region of the cornicles; upon the dorsum a 

 sprinkling or mottling of dark green or rusty brown specks irregularly dis- 

 tributed, and in some the faint dusky specks at the bases of the abdominal 

 hairs also show; in some of the older individuals, the dark markings form 

 a transverse dash upon the segments posterior to the cornicles, and joints 

 1 and 2 of the antennae and the dorsum of the head are often blackish. The 

 lai'ge yellow to pale orange blotches surrounding the cornicles are not as 

 sharply outlined as in the larvae and pupae; cauda and cornicles entirely con- 

 colorous with body, not marketl with black; distal half of antenna more or less 

 blackish; distal ends of all tibiae, the tarsi and tip of beak black; eyes ap- 

 pearing black but really very dark red; length of body 1.70 to 2.20 mm.; 

 length of antenna .90 to 1.10 mm.; cornicles .11 to .14 mm.; joints 3 and 7 

 of antenna sub-equal, either being a trifle longer than the otlier. 



Pupa. 



Specimens taken with the preceding apterous females. 



The pupae in all stages are decidedly pink in color and the deeper color mark- 

 ings that are usually deep green in case of the apterous females are usually 

 reddish here, but may be dusky, the darkest color coming next to the well 

 defined yellowish or pale orange blotches surrounding the cornicles. The 

 body generally is quite strongly tinged with pink; the dusky specks so con- 

 spicuous upon the larvae are entirely absent, as are all the heavier dark 

 markings of the adult forms. 



Alate Viviparous Female— Plate 9, figs. 3 and 6. 



Specimens from Delta, Colorado. Sent by Mr. Weldon May 23, 1908. 



Head, thorax, antennae, tarsi, distal ends of femora and tibiae, sternum of 

 mesothorax, anal plates and coxae deep shining black; the middle portion of 

 . the dorsum of segments 3, 4 and 5 and transverse bands on segments 6, 7, 

 and 8, small spots and dashes upon joints 1 and 2 and the lateral margins 

 of joints 2 to 7 also black or blackish; abdomen light olive to yellowish 

 green ; cornicles short, cylindrical or somewhat tapering, dark green to black 

 in color and with moderate flange; cauda of moderate length, green at the 

 base, black about the margins, upturned; lateral tubercles of prothorax 

 moderate in size; strong tubercles upon lateral margins of abdominal seg- 

 ments 3 to 7, helping to make the margins of the segments prominent and 

 well defined; length of body 1.75 mm.; width .75 mm.; length of antenna 

 1.12 mm.; joints: III, .30; IV, .19; V, .16; VI, .10; VII, .30 mm.; length of 

 wing 2.50 to 3 mm. ; hind tibiae, .90 mm. ; cauda, .11 mm. ; cornicles, .11 mm. ; 

 third joint of antenna strongly tuberculate on inferior surface with about 

 24 circular and oval sensoria; joint 4 with about 6 sensoria in middle por- 

 tion; joints 3 to 7 quite strongly transversely wrinkled; wing venation 

 normal; 2nd fork about equally distant from 1st fork and the margin of 

 the wing. 



