August, '11] GILLETTE: APHIDID.E 383 



slightly tapering and moderately long cornicle, and the reddish brown 

 abdomen are characteristic of this species. A very similar but appar- 

 ently distinct species occurs on Artemisia ludoviciana in northern 

 Colorado. See figures 9 and 9a. 



Macrosiphum tulipcc Monell. — A very common louse where the 

 tulip tree, L. tulipifera, was seen at Lansing, Fort Lee, Washington, 

 D. C, Kansas City, Amherst and Webster. Figures 10 and 10a. 



Macrosiphum rudbeckicc Fitch. — Taken on golden glow at Detroit 

 and Webster. This is a very common species on Rudheckia, both 

 wild and cultivated, on both slopes of the mountains in Colorado. 

 We have taken it upon Solidago in a few instances. The shorter cor- 

 nicles alone will separate the fall adults from those of solidaginis. See 

 figures 11, 11a, and 12. 



Macrosiphum sonchi Linn. — What I believe to be this species 

 was taken on Soyichus at Webster, Mass., and at Washington, D. C. 

 Notice the remarkably long third joint and flagellum of the antenna. 

 A great deal of collecting from Sonchus in Colorado has not given this 

 species. Figures 13 and 13a. 



Macrosiphum erigeronensis Thos. — Taken at Fort Lee on Eri- 

 geron sp. The species is also fairly common at Fort Collins on Eri- 

 geron canadense. There seems to be considerable variation in the 

 length of the antennae between the New Jersey and the Colorado 

 species, the former being the shorter. The drawings, figures 14, 14a 

 and 15 are from an alate viviparous female taken July 26 at Fort 

 Collins. There may be two species involved. 



Macrosiphum roscc Linn. — Taken at Chicago, Lansing, Detroit, 

 Webster and Wood's Hole, and in both green and pink forms on wild 

 roses at Portland, Ore. Appears to be common wherever roses are 

 grown. This is a common species on both the eastern and western 

 slopes in Colorado. Taken in both colors, green and red. Figures 

 16, 16a and 17. 



Macrosiphum solidaginis Fab. — Taken on Solidago at Washington, 

 Webster and Portland, Ore., and on Aster sp. at Albany and Portland, 

 Ore. This is a common species on Solidago about Fort Collins and 

 Denver. See figures 18 and 18a. 



Macrosiphum liriodendri Monell. — Taken on leaves of Liriodendron 

 tulipifera at Washington, agree with specimens of the same species in 

 the collection taken by Mr. J. T. Monell at St. Louis, Mo., and others 

 by Mr. J. J. Davis taken at Urbana, 111. An apterous oviparous 

 female from Davis has the hind tibiae well covered with sensoria (?) 

 in proximal two thirds. The males are winged. See figures 19, 19a, 

 20 and 21. 



Macrosiphum pisi Kalt. — Taken from Trijolium pratense at 



