The Aphididae of Nebraska 5 i 



longest. Honey tubes rather long (0.45 mm.), imbricated, shining black. 

 Tail short, slender, acute, black. Anal plates blackish. 



IVingcd viviparous female: General color of living specimens black. 

 Head and thorax shining black. Prothorax and abdomen dull black (in 

 mounted specimens these latter are dark reddish brown). Prothorax with 

 very small lateral tubercles. Abdomen with three black marginal spots 

 on each side of beak, not reaching to middle coxae. Antennae on incon- 

 spicuous frontal tubercles, about half the length of the body, blackish, 

 with III paler and with a few sensoria; III to VII more or less minutely 

 annulate. Hind pair of legs with femora black except the immediate base, 

 the rest with distal ends of femora black; all of tibial tips and tarsi black. 

 Wings with yellowish insertions, subcostal and stigma, the latter with 

 dusky border; oblique veins yellowish brown. Honey tubes and tail as in 

 apterous form, but rather shorter. Anal plates black. Length of body 2 

 mm., to tip of wings 3.40 mm. 



On wild liquorice (Glycyrrhiza lepidota). Lincoln, June 3, 

 and War Bonnet Canyon, June 24, 1890. The measurements 

 were taken from the War Bonnet specimens which were some- 

 what larger than the ones from Lincoln. 



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

 (no. 400). 



61. Aphis middletonii Thomas. 



Thomas, Ins. Ill, 8th Rep., p. 99 (1879). 

 Oestlund, Syn. Aph. Minn., p. 54 (1887). 



"Apterous form: The color of full grown specimen is leaden gray, with 

 head more or less dusky; abdomen with marginal spots and also commonly 

 some transverse bands of black. Eyes as usual in Aphis. Antennae short, 

 about one third or not more than half the length of the body, dusky except 

 at base ; III longest. Beak rather long, reaching third pair of coxae (0.50 

 mm.). Legs more or less dusky. Honey tubes short (0.15 mm.), slightly 

 thickest at base. Tail short, conical, hairy. Anal plates dusky or black. 

 Length of body 1.50 to 1.75 mm." 



"Winged form: Antennae about half the length of the body; III with 

 several rather large sensoria arranged in almost a regular row. Ocelli 

 present but small, the two lateral ones close to the compound eyes. Beak- 

 reaching second pair of coxae. Head and thorax black, abdomen dull 

 green as in apterous, with a lateral row of dusky spot9 and more or less 

 pulverulent. Wings as usual in the genus. Honey tubes short, almost as 

 long as the tarsi, cylindrical." 



On roots of daisy fleabane (Erigeron ramosus) and common 

 fleabane (Erigeron canadensis) . Lincoln, July 20, 1890; golden- 



135 



