84 Thomas Albert Williams 



various forms is not so great as in Buckton's specimens, but I am 

 sure this is his species. 



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

 145, 146, 147) and of the U. S. National Museum (no. 395). 

 109. Siphonophora pelargonii (Kaltenbach). 



Kaltenbach, Mon. Pflan., p. 21 (1843). Aphis pelargonii. 



Koch, Die Pflan., p. 193, figs. 265, 266 (1854). Siphonophora pelargonii. 



Buckton, Mon. Brit. Aph., I, p. 136, pi. XV (1876). Siphonophora 

 pelargonii. 

 Apterous viviparous female: Bright pea green. Eyes red. Antennae and 

 tarsi dusky, the former much longer than the body. Honey tubes very 

 long and slender (0.65 mm.), green. Tail robust, upcurved, not half the 

 honey tubes in length, green. Size about the same as the winged female. 

 Winged viviparous female: As in the apterous form, but legs and an- 

 tennae darker. Head and two spots on prothorax dark green. Thoracic 

 lobes light greenish olive. Wings delicate, with pale insertions and grayish 

 stigma ; the veins rather prominent, brownish ; VII longer than III. Tarsi 

 and tibial tips blackish. Beak not reaching the hind coxae, with a sharp 

 black tip. Honey tubes and tail as in apterous form. Length of body 

 2.20 mm., to tip of wings 4 mm. 



What I take to be the male was found on hollyhock at Ashland, Novem- 

 ber 1, though I found no oviparous females. Head, prothorax, thorax, 

 antennae, legs (except base of femora) and honey tubes black. Wings 

 very long, with brownish stigma. Abdomen greenish, with blackish brown 

 spots on the dorsum. Tail rather short, acute, brownish. Length of body 

 2 mm., to tip of wings 4.60 mm. 



On under side of leaves of hollyhock. Ashland, November I, 



1890. On leaves of skeleton geranium. Omaha, January 16, 



1891. Although formerly supposed to be but a hothouse louse, 

 this species is able to stand severe cold. It was found at Ashland 

 after considerable snow had fallen. Buckton and Koch both 

 noticed this also. 



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

 148, 149, 150) and of the U. S. National Museum (no. 287). 



no. Siphonophora pisi Kaltenbach. 



On clover in greenhouse. Lincoln, December 30, 1890, speci- 

 mens nos. 151 and 152, University of Nebraska collection. 



in. Siphonophora rubi (Kaltenbach). 



Kaltenbach, Mon. Pflan., p. 24 (1843). Aphis rubi. 



168 



