The Aphididac of Nebraska 67 



verse bands of brown. Honey tubes much as in apterous female, but 

 sometimes slightly dusky. Tail similar, about one third as long as the 

 honey tubes. Length of body 2-2.50 mm., to tip of wings 3.75-4 mm. 



"Winged male: Antennae, head, band on prothorax, row of dots on each 

 side of dorsum of abdomen and transverse patch back of middle of same, 

 black. Legs very long, with coxae, apical half of femora and apical fourth 

 of tibiae, together with tarsi, black, the rest yellow. Honey tubes long, 

 slender, slightly incrassate. Antennae about one third longer than body, 

 slender, roughened with numerous sensoria ; I large, thickened, about as 

 long as II; III longer than any except VII ; IV and V subequal ; VI shorter 

 than V; VII very long and slender. Tail minutely tuberculate, with sev- 

 eral curved, stiff hairs arising from the margin. Length of body 2 mm., 

 antennae 2.70 mm., honey tubes 0.50 mm., wing expanse 8.50 mm." 



"Oviparous female: Body globose; greenish, shade varying with age of 

 specimen. Antennae pale at base but blackish apically and at articulations. 

 Legs pale, articulations and tarsi dusky; the thickened posterior tibiae 

 greenish brown. Antennae short, less than half the length of the body; 

 6- jointed; I and II short, subequal; III and VI subequal; both longer 

 than any of the others ; IV and V subequal, about one third shorter than 

 III ; III-VI strongly tuberculate, having numerous sensoria. Tail long 

 and large, spinosely tuberculate, with several long curved hairs arising 

 from its dorsal surface. Beak reaching posterior margin of middle coxae. 

 Length of body 0.75-1 mm." (Weed). 



On under side of leaves of gooseberry and currant (Ribes sp.), 

 causing them to blister and turn reddish. A very common species 

 and frequently so thick as to cause considerable damage, as was 

 the case during the season of 1889. Lincoln, Ashland, Weeping 

 Water, Pine Ridge, War Bonnet Canyon. 



There are several varieties in the state. The specimens from 

 Pine Ridge are much more bristly than usual and of a much paler 

 color, many having scarcely any darker markings on the dorsum. 

 The Lincoln specimens have the honey tubes more than ordinarily 

 clavate, but do not differ much in color from the typical form. 

 Some forms have considerable amount of capitate hairs on the 

 winged individuals, while others have very few or none of them. 



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

 109, no) and of the U. S. National Museum (nos. 136, 137). 



84. Myzus rosarum (Walker). 

 Walker. Aphis rosarum. 

 Koch, Die Pflan., p. 180, figs. 247, 248 (1854). Siphonophora rosarum. 



151 



