322 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 4 



Koch. — Salix caprea. 



Buckton. — Salix species. 



Monell. — Salix lucida, nigra and babylonica. 



Oestlund. — Angelica atropurpurea. 



Weed. — Salix species. 



From Mr. Bragg's collections made at Fort Collins, Col., I extract 

 the following records: From parsley, Petroselinum hortense, August 

 25, 1907, October 5, 1907, November 1 to 25, 1910, and from willow, 

 June 22, 1908. Mr. Bragg also took this species at Amherst, Mass., 

 July 26, 1909, on Pastinaca saliva, and at Webster, Mass., July 26, 

 on the same plant and on caraway, Carwn carui. 



Prof. Ellsworth Bethel of Denver, Col., sent me a fine lot of speci- 

 mens which he took at Tolland, Col., at an altitude of 8,000 feet on 

 Ldgusticufn porteri, October 19, 1908. 



I have also received specimens from Prof. Edith M. Patch taken at 

 Orono, Me., on caraway, July 29, 1910, and Mr. J. J. Davis wrote me 

 from Chicago that he had taken the same louse in great numbers 

 from Zizia aurea in Illinois. 



So all the way through this species seems to hold to species of 

 Salix for the winter host plant and to species of JJmbelliferce for its 

 mid-summer hosts as Kaltenbach pointed out when he wrote his 

 description. 



Rhopalosiphum pastinacoB (L.). Linnaeus described this species 

 from the common parsnip, Pastinaca saliva. The only subsequent 

 description I have seen of this species under this name is the one by 

 Buckton in his Monograph, volume II, p. 25. It seems to me very 

 probable that xylostei Schr. is a synonym of this species. Shrank's 

 description would not incUcate a different species; Kaltenbach's de- 

 scription of it fits pastinaccB which he seems not to have known, and the 

 description by Buckton hardly indicates that xylostei is a good species. 

 Schrank took this species from honeysuckle (Lonicera sp.); Buckton 

 records his specimens from Lonicera xylostei and periclyneum; Kal- 

 tenbach's were from Lonicera periclyneum and Conium maculaium, 

 and Koch records his from Lonicera xylostei. A slide from Mr. 

 Monell labeled xylostei is marked ^'Lonicera pastinaca St. Louis, 

 November 4" and I have just recently received specimens of what 

 seems to be the same louse from Miss Mary Murtfeldt, Kirkwood, 

 Mo., which she reported to be injuriously abundant upon honeysuckle 

 nearly every year. 



These references to xylostei records are given to show how perfectly 

 the food plants fit in with those of what I have been calling pastinacce, 

 and which seems to have for its hosts several species of the Umhelli- 



