THE ROUGH-HEADED CORN STALK-BEETLE 3 



DISTRIBUTION 



The known distribution of Euetheola rugiceps in the United States 

 is shown in Figure 1. The data upon which the map is based were 

 obtained from the literature, from hitherto unpublished field records 

 and correspondence of the bureau, and from personal correspondence 

 with a number of museum and experiment station entomologists. 4 



Euetheola rugiceps is recorded from all the Southern States lying 

 south of the latitude of Washington, D. C, with the exception of 

 Florida and Oklahoma. Judging by the erratic manner in which the 

 species has been observed to occur in the infested sections of Virginia, 

 it would be inadvisable to draw final conclusions regarding the limits 

 of distribution from the evidence at present available. In Virginia 

 the species was found only in that part of the coastal plain which 

 lies between the Potomac and James Rivers, apparently preferring 

 low. moist, poorly 

 drained soils. Even 

 within the area thus 

 restricted, the spe- 

 cies appears at 

 present to be of very 

 unequal distribu- 

 tion, being abun- 

 dant in certain lo- 

 calities and rare or 

 absent in others. 

 It may be found 

 swarming in certain 

 fields, utterly de- 

 stroying the corn 

 crop, while other 

 fields of the same 

 general type less than a mile away appear to be uninfested. Doubt- 

 less there are unknown factors which influence and limit the spread 

 of this species. 



The following is a list of localities, arranged according to States, 

 from which there are records of the occurrence of the species. 



Alabama. — Birmingham, Catherine, Carollton, Cleveland, Eutaw, Hampden, 

 Hartsells, Mobile, Sprott. 



Arkansas (by counties). — Ashley, Bradley, Clark, Crawford, Cross, Hot 

 Springs, Howard, Jackson, Jefferson, Lincoln, Lonoke, Monroe, Nevada, Perry, 

 Pope, Pulaski, St. Francis. 



Georgia. — Bainbridge, Canton, Dalton, Macon. 



Kentucky. — Guthrie and Hartford. 



Louisiana. — Atchafalaya River, Baldwin, Baton Rouge, Berwick, Breaux 

 Bridge, Broussard, Castille, Clinton, Church Point, Crowley, Donaldsonville, 

 Franklin, Hester, Koran, La Fayette, Mer Rouge, Mill Haven, Monroe, Mound, 

 .Morgan City, New Iberia, New Orleans, Oak Grove, Plaquemine, Rayne, Scott, 

 St. James, St. Joseph, Tensas Parish, Ville Platte. 



Fig. 1. — Map showing distribution of Euetheola rugiceps in 

 the United States 



* Thow: who furnished valuable data in thie connection Include Franklin Sherman, North 

 Carolina Department of Agriculture; J. R. Watson, Florida Agricultural Experiment Sta- 

 tion ; A. V. Conradi, Clemson College, S. C ; W. V. Reed, Georgia State Board of Agricul- 

 ture; \v. K. Hinds Alabama Agricultural Experiment Station; .7. j. Davis and George G. 

 Ainiie, of the Bureau of Entomology; 8. J. Hunter, of (he University of Kansas ; W. J. 

 Holland. Carnegie Museum; Charles Scbaffer, Brooklyn Institute of Arts and Sciences; 

 <;. <;. Becker, Arkansas Agricultural Experiment Station; H. Garman, Kentucky Agri- 

 cultural Experiment Station. 



