LITERATURE CITED. 



(1) Byars, L. P. 



1914. A destructive nematode introduced into the United States. 



(Abstract.) In Phytopathology, v. 4, p. 45-46. 



(2) 1920. A nematode disease of red clover and strawberry in the Pacific 



Northwest. In Phytopathology, v .10, p. 91-95, pi. 6-7. Litera- 

 ture cited, p. 95. 



(3) Godfrey, G. H. 



1922. The stem and bulb-infesting nematode in America. (Abstract.) 

 In Phytopathology, v. 12, p. 52-53. 



(4) Massalongo, C. 



1915. Appunti di zoocecidologia Italica. In, Marcellia, v. 14, p. 3-10. 



(5) McKay, M. B. 



1921. A serious nematode disease of strawberry and clover in Oregon. 

 In Oreg. Agr. Exp. Sta. Crop Pest and Hort. Rpt, 1915/20, p. 

 139-144, pi. 10-11. 



(6) 1922. Occurrence of Tylenchus dipsaci on alfalfa in Oregon. (Ab- 



stract.) In Phytopathology, v. 12, p. 105. 



(7) 1922. Distribution of Tylenchus dipsaci on wild strawberry in Oregon. 



Preliminary report. (Abstract.) In Phytopathology, v. 12 

 p. 445-446. 



(8) Piper, Charles V., and Beattie, R. Kent. 



1915. Flora of the northwest coast, xiii, 418 p. Lancaster, Pa. 



(9) Smith, Ralph H. 



1919. A preliminary note concerning a serious nematode disease of red 

 clover in the Northwestern States. In Jour. Econ. Ent., v. 12, 

 p. 460-462. Bibliography, p. 462. 



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