The Aphididae of Nebraska 85 



Koch, Die Pflan., p. 191, figs. 263-4 ( I §54)- Siphonophora rubi. 

 Buckton, Mon. Brit. Aph., II, p. 140, pis. XVII, XVIII (1876). 



Siphonophora rubi. 

 Thomas, Ins. 111., 8th Rep., p. 64 (1879). Siphonophora rubi. 



Winged viviparous female: Large, shining green, slightly pilose. Long 

 oval. Head narrow. Antennae and legs long and green ; the articulations 

 of the former are slightly marked with black. Eyes reddish brown. 

 Honey tubes long, curved and slightly thickened at their bases, then con- 

 stricted ; inflated at their midst, and finally expanded at their mouths. 

 Tail large and hairy. Tarsi black. Length of body 3.30 mm., of honey 

 tubes 1.27 mm. 



Winged viviparous female: Very large, wholly green but rather redder 

 on the thorax. Head with conspicuous red ocelli. Antennae nearly half 

 as long again as the body, rest of insect like larva. Wings iridescent, with 

 yellowish insertions, yellow subcostal and stigma; the whole insect slightly 

 pilose. Length of body 3.04 mm., of honey tubes 1.01 mm. 



Winged male: Green. Head very broad and black. Ocelli distinctly 

 marked. Antennae very long. Back thorax and prothorax green, with 

 black linear thoracic lobes and small scutellum. Abdomen very small, not 

 equal to the length of the head and thorax together. Four or five trans- 

 verse dark green dashes on dorsum. Honey tubes as in winged female. 

 Legs disproportionately long. Tail small. Wings remarkably large. Stigma 

 gray. From the under side the valves which support the penis can be 

 easily seen. Some males are redder than the above. Occasionally the 

 wings want the second cubital fork. Also the clavate character of the 

 honey tubes is more marked in some specimens than in others. Length 

 of body 2.54 mm., of honey tubes 0.50 mm. 



Apterous oviparous female: Form oval or sac-like, drawn out towards 

 the head. Green, slightly pubescent. Antennae and legs relatively longer 

 in this sex than in the viviparous female, a remark which does not usually 

 apply to other species. As the eggs approach maturity they appear like 

 oval whitish masses under the skin. After deposition and exposure to the 

 air they turn lustrous black. About 2.80 mm. long. (After Buckton.) 



Found on cultivated raspberry. Lincoln, October 21, i\ 

 Only a few winged viviparous females and larvae were found, 

 but they agree exactly with Buckton's description, so I am sure 

 of the species. This is another of the species that show affinities 

 to both Siphonophora and Rhopalosiphum, and is rather difficult 

 to locate satisfactorily. 



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

 (no. 393). 



169 



