The Aphididae of Nebraska 37 



Specimens in collection of the University of Nebraska (no. 52) 

 and of the U. S. National Museum (no. 52). 



42. Aphis apocyni Koch. 



Koch, Die Pflan., p. 97, figs. 131, 132 (1854). 



Thomas, Ins. 111., 8th Rep., p. 94 (1879). 

 Pupa: Yellowish green to light olive green. Head brownish. Antennae 

 about two thirds as long as the body, pale, with dusky tips. Eyes dark 

 red. Legs pale, with dusky tarsi. Wing-pads and thorax pale. Honey 

 tubes longer than tarsi. 



Wwgcd viviparous female: Head and thorax black. Eyes dark red. 

 Antennae shorter than body, pale, darker toward the tips. Beak reaching 

 middle coxae. Prothorax blackish, with lateral tubercles. Wings hyaline ; 

 insertions, subcostal, stigma and the slender oblique veins yellowish ; dis- 

 coidals uncommonly straight. Legs yellowish, with dusky joints and tarsi; 

 sometimes the hind pair are darker. Abdomen yellowish green, with 

 darker marginal spots and transverse band on the segments behind the 

 honey tubes. Honey tubes but little longer than tarsi, dusky black. Tail 

 about half as long as honey tubes, blackish, upcurved, rather acute. Be- 

 neath the sternum and coxae are dusky black; abdomen pale yellowish, 

 green; anal plates dusky black. Length of body 2.10 mm., to tip of wings 

 3.60 mm. 



On dogbane (Apocynum cannabinum), generally along the 

 upper branches and flower stalks. Elmwood, June 9, and Ash- 

 land, June 11, 1890. 



Oestlund is evidently wrong in considering this the same as 

 A. asclepiadis Fitch. My specimens differ much from the typical 

 A. asclepiadis, though I have found that species on this same 

 plant, but only when in close proximity to Asclepias, upon which 

 it was also very numerous. The only thing in which my speci- 

 mens differ from Koch's description is in being generally of a 

 lighter color. 



Specimens in the collection of the U. S. National Museum 

 (no. 53). 



43. Aphis artemisicola n. sp. 



Apterous form: Body reddish wine-colored. Antennae shorter than 

 body, black, with three first joints paler. Eyes black. Head, thorax and 

 abdomen reddish wine colored, the latter with marginal row of black dots. 

 Legs reddish, with dusky to black joints and tarsi. Honey tubes black, 

 0.35 mm. long. Tail acute, hairy, black, about one half the honey tubes 

 in length. 



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