19 



Specimens of this species were lirst discovered in small numbers in 

 June, 1884, on wheat at Ca])in John Bridge, Md., while during the same 

 month, after harvesting- of the wheat, it was found by me to be quite 

 plentiful on rj'e and oat near Washington, D. C, and among them 

 many of the wdnged insects, mainly stationed on the petioles and green 

 seed capsules, which had become more or less discolored on that 

 account. Whereas the majority of larva? were found on the under 

 side of the leaves, none were observed on the stems or roots. At the 

 same time and in the same field they were also found infesting the ears 

 and leaves of Agrostis vu/garis, Bronius secalinus^ and Dactyl 1h glo- 

 merata growing ))etween or near the grain. During Septeml)er of 1881: 

 migratory females found on wheat were received from Oxford, Ind. 

 As an illustration of how far certain species of aphides may be dis- 

 tributed b}^ currents of air, it may be Avorth while to mention the 

 fact that a number of migrants of this species were dipped up from 

 the surface of the Alantic Ocean !>1 statute miles from the nearest 

 land, in the neighborhood of Nova Scotia, July 3, 1887, by the Fish 

 Commission steamer Grampus. During November of the same year 

 the species was found lirecding on oat at Washington, D. C. In May, 

 1881), it was found on oat at Paxton and on wheat at Pleasantville, Ind., 

 while at the same time it was reported as being very plentiful on wheat 

 at Shiloh Hill, III. During June of the same year it was reported as 

 being ver}- abundant, on wheat and oat at Glendale and Columbus, 

 Ohio, and Vincennes, Ind., and from Selkirk, Mich., on wheat and 

 r3'e, at which time it was also found to be very a])undant on oat at 

 Highlands, N. C. In August it was found on oat at Ottawa, Canada, 

 and in October on clover growing among the dry stubble of wheat at 

 Washington, D. C. In January, 1890, specimens were discovered on 

 wheat in Indiana and at Liberty, Va. , covering the [)lants and killing 

 large numbers of them. In May of the same year they ^vere found 

 on rye at Landisburg, Pa., while from Trenton, M(M'ristown, and 

 Camden, N. J., the report came that the}^ covered the wheat and r^^e 

 and were doing nuich damage. During June of 1890 the}" were 

 reported from Storrs, Conn., Lunenburg, Pa., New Harmony, Ind., 

 Milton, Ky., and Larue, Ark., as ruining the wheat and oat crop. 

 In June and July of 1891 the species was observed on wheat at 

 Millville and McGregor, Iowa, and Nashville, Temi. The species 

 was also found in Ma}' of 1892 on wheat at Columbus, Ohio; in 

 November on Setarla virldls at Washington, D. C. ; in June and July 

 of 1891 on timothy and wild rye in Virginia, opposite Washington, 

 and in September on the ears of oat at Shelton, Mont. Lastly, they 

 were reported as doing much damage to the ears of wheat from 

 Brookings, S. Dak., since which time nothing has been heard of the 

 species from any locality. 



The food plants on which, thus far, it has been observed in this 

 country are: 



