The Aphididae of Nebraska 83 



tennae very long, slightly olive at the tips. Frontal tubercles very large 

 and slightly gibbous. Eyes red. Head, thorax and abdomen consolidated 

 and without perceptible separation. Honey tubes cylindrical, greenish 

 and black at tips. Legs long, hirsute; genua olive; tarsi black; tail green. 

 Size of body 2.02 by 1.01 mm. 



Winged viviparous female: Bright green. Antennae dark olive, the two 

 basal joints green. Eyes red. Thoracic lobes and scutum olive. Abdo- 

 men carinated, with four dark spots within the folds. Honey tubes fine 

 and black. Legs green, hardly so long as those of the larva. Tarsi black, 

 the gibbous character of the basal joints of antennae less marked. Wings 

 with pale brown subcostal and stigma. Some specimens show disjointed 

 transverse bars on the abdomen. Size of body 1.52 by 0.62 mm. Honey 

 tubes about 0.50 mm. long. Antennae in both forms much longer than the 

 body. (After Buckton.) 



On wild mint (Mentha canadensis). Weeping Water, October 

 11, 1888. 



108. Siphonophora muralis Buckton. 



Buckton, Mon. Brit. Aph., I, p. 157, pi. XXVI (1876). 



Apterous viviparous female: Body ovate, hairy. Color a rich chestnut 

 brown. Antennae longer than body, black, with pale base; III longest, 

 longer than IV, V and VI together, very thickly covered with sensoria, 

 hairy. Eyes reddish brown. Beak reaching hind coxae. Legs very long, 

 yellowish, with distal ends of femora, the tibial tips and tarsi black. 

 Honey tubes tapering, black, 0.55 mm. long. Tail slender, acute, about 

 three fourths the honey tubes, yellow. 



Pupa: Similar, but with antennae, tail, honey tubes and legs shorter, and 

 body generally smaller. 



Winged viviparous female: Smaller and more linear than the apterous 

 female. Antennae blacker and III with more sensoria. Head and thorax 

 dark brown. Legs with a greater proportion of black than in the apter- 

 ous form. Wings large, with yellowish insertions and yellowish brown 

 subcostal and stigma ; oblique veins slender, light brown. Honey tubes 

 and tail as in apterous form. The general color is like that of the apter- 

 ous form, but of a darker brown, generally. Length of body 2.75 mm., to 

 tip of wings 4.25 mm. 



Winged male: Smaller than the winged female. Wings more delicate. 

 Head and thorax but little darker than the abdomen, otherwise as in that 

 form. Length of body about 1.75 mm., to tip of wings 3.75 mm. 



On wild lettuce (Lactnca sp.) throughout the season for the 

 last three years ; very common. Ashland, Lincoln, Weeping 

 Water. Wabash, Fremont. The difference in size between the 



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