The Aphididae of Nebraska 53 



honey tubes. Legs with yellowish brown femora and tibiae and black 

 joints and tarsi. Honey tubes about three times the tarsi, brown to black, 

 about 0.30 mm. long. Tail hardly half as long as the honey tubes, acute, 

 from yellowish green to black. Length of body about 1.50 mm., to tip of 

 wings 3 mm. 



On upper branches, leaves and seedpods of evening primrose 

 (Oenothera biennis). Quite common at Ashland in May, 1890, 

 and October, 1889, and at Lincoln, June, 1890. On Oenothera 

 serrulata, War Bonnet Canyon, June 24, 1890. It causes the 

 leaves to curl up somewhat. There seems to be considerable 

 variation in the color of this aphis. The spring forms have gen- 

 erally less dark markings than the summer or fall forms. 



Specimens in the collection of the University of Nebraska (nos. 

 78, 79, 80) and of the U. S. National Museum (nos. 96, 97, 98, 99). 



64. Aphis parthenocissi n. sp. 



Apterous viviparous female: Uniformly reddish brown. Antennae with 

 two first joints dusky; III, IV and V white; VI and VII black; VII 

 longest. Eyes very dark red. Beak very long, reaching beyond the third 

 pair of coxae. First pair of legs pale, with black joints and tarsi; second 

 pair darker, the tibiae with both ends blackish; third pair all black, but 

 a small portion of the middle of each tibia and the immediate base of the 

 femora. Abdomen arched, very broad in comparison to the small and 

 narrow head and thorax, giving the body a pear-shaped outline. Honey 

 tubes black or sometimes paler at base, 0.28 mm. long. Tail about half 

 as long, rather conical, black. Anal plates blackish brown. 



The very young larvae have all parts pale but the tips of the antennae 

 and the tarsi ; as they grow older the dark markings become more and 

 more prominent. Length of body 1.60 to 1.80 mm. 



Readily recognized by its reddish color and pale, black tipped 

 antennae. It differs from A. setariae (Thomas) in having a black 

 tail, paler antennae (the white portion taking in the fifth joint) 

 and a much longer beak. This latter is by far the longest I have 

 ever seen in this genus. In the very young individuals it reaches 

 nearly or quite to the tip of the abdomen. 



Found clustering along the midrib of the leaflets and along the 

 petioles of the Virginia creeper (Parthenocissus 5-folius), thickly 

 attended by ants. Lincoln, August 7, 1890. I watched the vine 

 upon which it was found very closely till the close of the month 



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