40 Thomas Albert Williams 



Pupa: Similar to apterous form, but with shorter and darker antennae, 

 honey tubes and tail, and legs with dusky tibiae. Wing-pads dusky. 



Winged viviparous female: General color dark green (lighter in immature 

 individuals). Head brownish black, pointed in front. Antennae black, 

 with paler bases, on inconspicuous tubercles, about two thirds the body in 

 length ; III rather longer than VII ; VI, VII and part of V annulated ; 

 III, IV and V with a few circular sensoria. Eyes black. Neck and pro- 

 thorax green. The latter without lateral tubercles. Thorax with a broad 

 central black band, sides yellowish green. Wings with rather pointed apex, 

 yellowish insertions and very prominent black veins. Stigma dirty white. 

 Stigmal vein only slightly curved. The marginal cell but little broader 

 than the stigma. Second branch of cubitus generally much nearer the first 

 branch than the apex of the wing. Legs yellowish green, with tips of 

 tibiae dusky; tarsi dusky to black. Abdomen green with dark green mar- 

 ginal dots and two or three brownish green bands behind the honey tubes. 

 Honey tubes reaching to base of tail, otherwise as in apterous form. Tail 

 as in apterous form, or sometimes slightly dusky. Length of body about 

 1.50 mm., to tip of wings 3 mm. 



On both sides of the leaves of Chrysanthemum in the green- 

 house of the botanical department of the State University, De- 

 cember 30, 1890. Brookings, S. D., 1894-95. 



Cotypes in the collection of the LIniversity of Nebraska (nos. 

 55, 56). 

 47. Aphis cnici n. sp. 



Apterous viviparous female: General color reddish brown. Antennae 

 but little more than half the body in length, dusky, with pale base. Legs 

 with base of femora yellowish, rest dusky to black. Honey tubes twice 

 the tarsi in length, black. Tail short, acute, black. 



Pupa: Color, size, honey tubes, legs, antennae and tail as in apterous 

 form. Head rather smaller. Wing-pads dusky to black. Insect as large 

 as the winged form. 



Winged viviparous female: General color reddish brown. Head small 

 in comparison to the size of the insect, very dark reddish brown to black. 

 Antennae black, pale at base, reaching to or slightly beyond the base -of 

 the honey tubes, on inconspicuous frontal tubercles; III and VII subequal ; 

 III and IV with sensoria. Neck and prothorax greenish brown, the latter 

 with lateral tubercles, a blackish line on its front margin and a brown dot 

 on either side of its center. Beak very long, reaching beyond the third 

 pair of coxae, two last joints blackish, last very acute. Thorax with lobes, 

 ventral surface and a spot in front and just below the base of each wing, 

 black; membrane yellowish brown. Wing insertions, costal,.. subcostal and 

 stigma yellowish ; oblique veins very slender, pale brown ; the discoidals 



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