731 



11. s., parasites on EujltcMa ribearia, which appeared in Central Michi- 

 gan in alarming numbers in 1890 for the first time; Aphidiiis persiaphis, 

 u. s., parasite on Myzus persicce ; DerostenuH splendens, u. s., and Cratote- 

 chus brevicapitalus, \i. s., parasites on Eeterocampa subal Means ; Hey- 

 denia unica, n. s., believed to be the first American species of this 

 genus thus far described. 



Michigan Station, Bulletin No. 74, May, 1891 (pp. 6). 



Foot rot in sheep, E. A. A. Grange, V. S. — The author distin- 

 guishes two forms of this disease, one of which is contagious and the 

 other sporadic. The s^^mptoms of each form are described, and sug- 

 gestions are made regarding treatment. 



Nebraska Station, Bulletin No. 16, April 15, 1891 (pp. 98). 



Experiments in the culture of the sugar-beet in Nebraska, 

 H. H. Nicholson, M. A., and E. Lloyd, Ph. D. (illustrated). — This is a 

 second report of progress in experiments with the sugar- beet in Nebraska, 

 and includes a statement of the results obtained in 1890, those for the 

 previous year having been reported in Bulletin No. 13 of the station (See 

 Experiment Station Record, Vol. II, p. 111). The plan of work in 1890 

 involved the establishment of substations for beet culture at conven- 

 ient points in different sections of the State, and the co-operation of the 

 county agricultural societies and of a large number of farmers. The 

 substations were located where they could be visited at least once a 

 month by agents of the station, and where individuals could be found 

 who would give the use of land for experimental purposes and cultivate 

 the beets according to the directions issued by the station. Each sub- 

 station was supplied with a standard rain-gauge and thermometers for 

 air and soil temperatures, and with printed directions and blanks for 

 reporting tri-daily observations. Besides monthly reports on the condi- 

 tion of the work at the substations, the field agents were required to 

 send samples of the soils of the experimental plats to the chemical 

 laboratory of the station. Twenty-five substations formed the visiting 

 circuit of the agents, and more or less regular reports were received from 

 six other substations. 



The substations may be roughly grouped iuto southern, middle, and northern dis- 

 tricts. 



The southern district includes that portion of the State along [the Burlington 

 Railroad south of the Platte River and west of Lincoln. 



The middle district comprises that portion of the State north of the Platte River 

 adjacent to the main lines of the Union Pacific and Burlington Railroads west of 

 Grand Island. 



The northern district comprises that portion of the State adjacent to the Elkhorn 

 Railroad and west of Norfolk. 



The following varieties of seed were imported by the station direct from the grow- 

 ers in France and Germany and used at the substations throughout the State: 



