The Aphididae of Nebraska 55 



Antennae pale, black tipped. Legs pale, joints and tarsi black. Honey 

 tubes and tail black, the latter one half the former. Outline broadly ovate. 

 Winged viviparous female: General color black, the abdomen sometimes 

 paler. Antennae nearly as long as the body ; black, minutely annulate ; 

 III longest, with many irregularly arranged sensoria. Head and thorax 

 shining black. Prothorax with a lateral tubercle. Front legs yellow, 

 joints and tarsi black; middle legs darker and hind pair black except the 

 base of femora and upper middle portion of tibiae. Wings with slender 

 veins. Stigma elongate and very acute, dusky. Honey tubes black, 0.30 

 mm. long. Tail half as long as honey tubes, black, rather acute, hairy. 

 Length of body about 2 mm., to tip of wings 4 mm. 



On dock (Rume.v sp.), generally along the upper branches and 

 flower stalks. Buckton describes both apterous male and apterous 

 oviparous female. 



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

 85) and of the U. S. National Museum (no. 113). 



67. Aphis salicicola (Thomas). 



Thomas, Bull. 111. St. Lab. Nat. Hist., 2, p. 8 (1878). Siphonophora 

 salicicola. 



Thomas, Ins. 111., 8th Rep., pp. 63 and 192 (1879). Siphonophora 

 salicicola. 



Monell, Bull. U. S. Geol. Sur. Ter., V, 1, p. 24 (1879). Aphis salicicola. 



Oestlund, Syn. Aph. Minn., p. 63 (1887). Aphis salicicola. 

 Winged viviparous female: Head and thorax shining black; prothorax 

 with lateral tubercles ; head somewhat pointed in front. Antennae on 

 inconspicuous frontal tubercles; not quite as long as the body, black; 

 III longest, with numerous small, round sensoria. Eyes black. Wings 

 hyaline, with slender brown oblique veins ; subcostal and stigma dusky, the 

 latter rather long; cubital obsolete at base, with second branch very much 

 nearer the apex of wing than to the first branch. Legs rather long, nearly 

 all black. Abdomen dark green, with irregular dorsal markings. Honey 

 tubes imbricated, black, 0.28 mm. long. Tail curved upward, dusky, hairy, 

 at least one third as long as the honey tubes. Length of body 1.65 mm., 

 to tip of wings 3.40 mm. 



On willow (Salix discolor). Lincoln, War Bonnet Canyon. 

 No notes were made from the Lincoln specimens and there were 

 only very young apterous forms in the War Bonnet specimens, 

 so I can give no description of that form. Although this aphid 

 has a few of the characters of Siphonophora, it plainly belongs in 

 Aphis as now understood. 



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