2 BULLETIjST 432, U. S. DEPAETMENT OE AGEICULTURE. 



SYNONYMY. 



This species was first described by Panzer (1)^ as Chlorops denti- 

 comis^ it being wrongly placed in the genus Chlorops, and in the 

 year 1835 was referred to the genus Odontocera by Macquart (2). In 

 the year 1861 Eondani changed the generic name from Odontocera, 

 which was preoccupied, to Cerodonta (3) (in error published " Cero- 

 dontha"). The generic name Ceratomyza was used for this leaf- 

 miner by Schiner (4, p. 434) in 1862, this being a synonym for Cero- 

 dontha Eondani. 



HISTORY OF THE SPECIES. 



So far as could be ascertained from reference to specimens in the 

 National Museum collections, and Bureau of Entomology notes, this 

 leaf-miner was reared, by F. M. Webster, in September, 1884, for the 

 first time in this country, from volunteer wheat plants that sprang 

 up after harvest and near which adults had been captured earlier in 

 the same month. It was also swept with other wheat flies from fields 

 of growing wheat, during the period from November 13 to 15, 1884. 

 The species was reared by Webster from mines in the leaf sheaths 

 of young wheat, July 30, 1888; and on August 24, and again on 

 Octt)ber 12 of the same year, he reared adults from larvae found 

 mining the leaves of timothy. From wheat plants taken by him 

 July 7, 1890, at La Fayette, Ind., and shipped to the Bureau of Ento- 

 mology, adults were also reared by Mr, Theodore Pergande. On Feb- 

 ruary 24 to 28, 1891, Webster swept it from a field of growing wheat 

 at College Station, Tex. During the season of 1894 Dr. W. E. Brit- 

 ton (5), of the Connecticut Agricultural Experiment Station, reared 

 the species from mines in the leaves of corn which was being grown 

 under glass for vegetation experiments. During December, 1897, at 

 Wooster, Ohio, the adults were again reared by Webster from young 

 wheat plants. Dr. A. D. Hopkins (7) reared the fly from timothy 

 at Morgantown, W. Va., in 1898, the larvae doing considerable damage 

 to this grass. 



On June 26, 1905, Webster reared this species from bluegrass grow- 

 ing along the street parking in Aurora, 111. Flies were reared from 

 wheat plants collected at Lincoln, Nebr., December 9, 1904, by Geo. I. 

 Eeeves, and he swept them from young wheat at Wichita Falls, Tex., 

 April 16, 1905. Wildermuth reared it from wheat at Groveport, 

 Ohio, during the summer of 1909. It was sent by W. V. Eeed, April 

 2, 1909, from Cornelia, Ga., where the larvae were observed attack- 

 ing growing rye. During 1910, adults were swept in June and 

 July from alfalfa in fields on the college farm at Pullman, Wash., by 

 J. A. Hyslop. In 1911 it was reared, June 9, from a pupa found in a 



1 Numbers in parentheses refer to "Bibliography," p. 17. 



