1906.] NATURAL SCIENCES OF PHILADELPHIA. 535 



Missouri: Warsaw, Benton Co.; Springfield, Green Co.; Chadwick, 

 Christian Co. ; Seligman, Barry Co. ; Current River, county not recorded, 

 Mr. Sampson adds Camden, Howell, Douglas, Macdonald and Jasper 

 counties (Nautilus, VIII, pp. 18, 19). Baker records Arcadia, Iron 

 Co., and J. H. Britts found it in Henry Co. (Walker Coll.). 



Kansas: Arkansas City, Cowley Co. 



Arkansas: Mammoth Spring, Fulton Co. ; Hardy, Sharp Co. ; Eureka 

 Springs, Carroll Co. ; Rogers, Benton Co. ; Van Bm-en Co. ; Chester and 

 Porter, Crawford Co.; Carrion Crow Mt., near Atkins P. O., Pope Co.; 

 Gwynn and Poteau Mts., Sebastian Co.; Blue Mt. Station, Magazine 

 Mt. and Petit Jean Mt., Logan Co.; Hatton Gap, Rich Mt. and Mena 

 and Cove, Polk Co. ; Gilham, Chapel Hill, Horatio and Ultima Thule, 

 Sevier Co.; Morris Ferry and Rocky Comfort, Little River Co.; Hot 

 Springs, Garland Co. It has, in addition to these places, been recorded 

 from Hempstead, Nevada, Washington, Franklin, Pulaski, Johnson 

 and Perry counties by Mr. Sampson. 



Indian Territory: Wyandotte, Wyandotte Nation; Fort Gibson, 

 Cherokee Nation; Red Fork, Creek Co.; Eufaula, Sugar Loaf Mt., 

 Wister, Poteau, Tushkahoma, Standley, Antlers and Limestone Gap, 

 Choctaw Nation. 



Louisiana: Frierson and Nachitoches, Nachitoches Co. ; De Soto Co. 

 (Coll. B. Walker) ; Mt. Lebanon, Bienville Co. 



Texas: DeKalb, Bowie Co. ; Cooke Co. ; ^ Denison, Grayson Co. ; Dal- 

 las, Waco; Tarrant Co. ;^ Washington Co.;^ Burleson^ and Brazos^ 

 counties; Galveston. 



These places are plotted on the accompanying map, on which locali- 

 ties for P. dorfeuilliana are represented by dots and the variety samp- 

 soni by outlined dots. Henry and Camden counties. Mo., are the most 

 northern localities known, and Arcadia, Iron Co., Mo., and the Current 

 River are the easternmost. On the west it is known from Grouse 

 Creek, near Arkansas City, Kan., and throughout the eastern half 

 of the Indian Territory, and in Cooke Co. and Fort Worth, Tex. 

 Southward it penetrates to Washington Co., Tex., in the latitude of 

 Austin. 



This species thus inhabits an oblong area about 600 miles long and 

 300 wide. In Missouri and Arkansas it is not known from the Missis- 

 sippi lowlands, all known localities being above the 500 feet contour. 

 In Louisiana and Texas, however, it descends to half that elevation, 



* On the authority of Mr. J. A. Singley, 

 " On the authority of W. G. Binney. 



