The Aphididae of Nebraska 35 



green. Generally very pulverulent. Eyes brown. Honey tubes shorter 

 than tail, black. Tail green. Legs pale, with black tarsi. 



Pupa: Elongate, nearly linear, green, very pulverulent; head and thorax 

 darker. Eyes red. Antennae two thirds as long as the body, whitish. 

 Legs and wing-pads whitish. Tarsi dusky. Abdomen with sides nearly 

 parallel and drawn out to a gradual point behind; a median line of dark 

 green, a transverse row of impressed dots at base, and a similar row 7 on 

 each lateral margin, also a row of very small tubercles on the sides. 

 Honey tubes hardly as long as the tarsi, dusky. Tail short and conical, 

 pale. Beneath pale green, mesosternum darker; abdomen with a row of 

 marginal dots, corresponding to those above. Length of body 2.40 mm. 



Winged viviparous female: Head and thoracic lobes very dark green, 

 rest paler green, more or less pulverulent. Head pointed in front. Pro- 

 thorax with very small lateral tubercles. Antennae on very small frontal 

 tubercles; about two thirds as long as the body, pale; VII longest; III 

 with a few sensoria. Eyes red. Legs pale, with femoral tips and tarsi 

 dusky, rather slender and the hind pair rather long. Beak very short, not 

 reaching middle coxae, in many specimens hardly reaching beyond the 

 front coxae. Wings hyaline, with slender brownish veins and long, pointed, 

 grayish stigma; cubital subobsolete at immediate base; second branch aris- 

 ing much nearer the apex of the wing than to the base of the first branch. 

 Abdomen marked as in pupa, but more oval in outline, drawn out into a 

 conspicuous, hairy, concolorous tail, which is at least as long as the honey 

 tubes ; these latter as in pupa. Length of body 2.42 mm., to tip of wings 

 3.70 mm. 



On under side of leaves of cultivated plums, on the same trees 

 with Myzus cerasi and Plwrodon liuiinili. Ashland, June, 1890; 

 Weeping Water, June, 1889. 



Genus Aphis 

 40. Aphis albipes Oestlund. 



Oestlund, Syn. Aphid. Minn., p. 52 (1887). 



Apterous viviparous female: Reddish brown, paler beneath. The young 

 are greenish. The thorax a transverse dash on each side of the anterior 

 of abdomen, a similar one at base of honey tubes, a short longitudinal dash 

 between and in front of the honey tubes on the dorsum, and some of the 

 apical segments white and pulverulent. Antennae about half the length 

 of the body ; white, except tips of IV and V, and all of VI, which are 

 blackish ; VII longest. Beak reaching beyond middle coxae. Eyes red. 

 Honey tubes about two thirds as long as the tarsi, dusky to black. Legs 

 white with dusky tarsi. Tail short, conical, whitish. 



Winged vh-iparous female: Antennae not as long as the body, black; 



II 9 



