74 Thomas Albert Williams 



distinctly marked. A dark patch behind the head. The thoracic lobes are 

 somewhat linear in form and dark brown like the scutellum. Abdomen 

 with a faint green dorsal stain and green patches at the base of the nec- 

 taries. Wings hyaline, with green insertions and brown cubitus and 

 stigma. Other veins coarse and black. Cauda pointed and green. The 

 young are very delicate in tint, shading off from white to flesh-color, to 

 pink, and to yellow. They are often prettily spotted about the head with 

 rose color. They run very fast and are much more active than the adult 

 insects. Length of body 2.54 mm. 



My insect does not quite agree with Buckton's description and 

 feeds on a different plant. I think the difference is enough to 

 justify a varietal name at least, and it may be known by the fol- 

 lowing one. 



93. Siphonophora carnosa var. impatientis n. var. 



This form differs from the species in the following respects : 



Apterous viviparous female: As in the species but with tail pale. 



Pupa: Similar to the species except that the wing pads are 

 whitish. 



Winged viviparous female: Differs in having no dark patch 

 behind the head ; thoracic lobes but very little if any darker than 

 the remainder of the body, and the abdomen with no green mark- 

 ings. Honey tubes reaching to tip of abdomen, dusky to black. 



On upper branches and leaves of wild touch-me-not (Impa- 

 tiens fulva and /. pallida). Ashland, October 5, 1889; Wabash, 

 August 22, 1890. 



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

 127, 128, 129) and of the U. S. National Museum (no. 18). 



94. Siphonophora chrysanthemi Oestlund. 

 Oestlund, List Aph. Minn., p. 22 (1886). 

 Oestlund, Syn. Aph, Minn., p. 84 (1887). 



Apterous viviparous female: Color varying from dark brownish green to 

 almost black. Antennae on medium sized frontal tubercles, about three 

 fourths as long as the body, black, with III and base of IV paler; VII 

 longest. Legs rather short, dusky yellow, with joints, tips and tarsi black. 

 Dorsum with a few very small black tubercles. Honey tubes about 0.30 

 mm. long, black, imbricated. Tail yellowish, about half as long as the 

 honey tubes. 



Winged viviparous female: Head and thorax dark brown to black. Gen- 

 eral color dark brownish green to -almost black. Prothorax with side? 



I 5 8 



