THE PEA APHIS WITH RELATION TO FORAGE CROPS. 55 



duly abundant, the clover should be cut as soon thereafter as possi- 

 ble, since the cutting and drying of the clover will kill most of the 

 insects. Clover which becomes coated with the honeydew of the 

 aphides will not cure properly. Spring pasturing or early cutting 

 back of the clover will check the multiplication of this plant louse. 



A more brief general discussion of the pea aphis was published by 

 Dr. F. H. Chittenden as Circular No. 43 of the Bureau of Entomology 

 under the title "The Pea Aphis ( Macrosiphum pisi Kalt.)," February 

 25, 1909, pages 1-10. This publication is now out of print, but can 

 be consulted in most agricultural college libraries, as well as public 

 libraries, and in private ones. A farmers' bulletin covering the same 

 subject is in course of preparation. 



BIBLIOGRAPHY OF EUROPEAN LITERATURE CITED IN PAPER. 



1. Harris, Moses. Exposition of English Insects, etc., p. 66, pi. 17, fig. 10-12. 



London, 1782. 



2. Kirby, Wm., and Spence, Wm. An Introduction to Entomology, v. 1, p. 174. 



(Ed. 6, 1843, p. 142.) London, 1815. 



3. Boyer de Fonscolombe, E. L. J. H. Description des pucerons qui se trouvent 



aux environs d'Aix. In Ann. Soc. Ent. France, v. 10, p. 157-198, 1841. 

 Page 169. Aphis onobrychis Nob. 



4. Mosley, Oswald. Entomology, Genus, Aphis. In Gard. Chron. [v. 1], no. 42, 



p. 684, Oct. 16, 1841. 



5. Kaltenbach, J. H. Monograph ie der Familien der Pflanzenlause, p. 23-24. 



Aachen, 1843. 



6. Koch, C. L. Die Pflanzenlause, p. 190-191, fig. 261-262. Niimberg, 1857. 



7. Buckton, G. B. Monograph of the British Aphides, v. 1, p. 134-135. London, 



1876. 



8. Ormerod, Eleanor A. Report of Observations of Injurious Insects and Common 



Farm Pests ... 1885. 9th Report, p. 62-63. London, 1886. 



9. Cholodkovsky, N. A. The pea-louse (Siphonophora pisi Kalt.) and related 



species. Dept. Agr. [Russia], Bur. Ent., v. 8, no. 1, 15 p., 8 fig., 1909. (In 

 Russian.) 



10. Mordwilko, L. Le piiceron des pois ( lfacros{p/mm ^rm Kalt.). Sa biologie et les 



moyens de hitter contre lui. Dept. Agr. [Russia], Bur. Ent., v. 8, no. 3, 44 p., 

 16 fig., 1909. (In Russian.) 



11. Theobald, Fred V. British species of the genus Macrosiphum, Passerini, Pt. 



II. In Jour. Econ. Biol., v. 8, no. 3, p. 134-136, fig. 43, Sept. 29, 1913. 



12. Theobald, Fred V. Notes on the aphides of the cultivated peas (Pisin sativum 



and Lathyrus latifolius) and the allied species of Macrosiphum. In Transactions 

 of the Second International Congress of Entomology, Oxford, Aug., 1912, p. 380- 

 393, pi. 14-15, Oct. 14, 1913. 



BIBLIOGRAPHY OF AMERICAN LITERATURE. 1 



1878. Thomas, Cyrus. A list of the species of the tribe Aphidini, family Aphidge, 

 found in the United States, which have been heretofore named, with 

 descriptions of some new species. In 111. State Lab. Nat. Hist., Bui. 2, 

 p. 3-16, June. 



Page 8. Lists Siph. pisi on pea. 



1 Dates in italics refer to the more important references. Dates preceded by an asterisk indicate papers 

 which have been inaccessible to the writer. 



