THE PEA APHIS WITH REf.ATTOX TO FOHACE CROPS. 55 
duly abundant, the clover should })e cut as soon thereafter as possi- 
ble, since the cuttmg 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. Sprmg 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 pul^lished by 
Dr. F. H. Chittenden as Cncular No. 43 of the Bureau of Entomology 
under the title ''The Pea Aphis (Macrosiphum jjisi Kalt.)," P\^bruary 
25, 1909, pages 1-10. This publication is now out of print, ])ut can 
])e consulted in most agricultural college libraries, as well as public 
libraries, and in private ones. A farmers' bulletui covering the same 
subject is in course of ])reparation. 
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, \Vm., and Spence, Wm. An Introduction to Entomology, v. 1, p. 174. 
(Ed. 6, 1843, p. 142.) London, 1815. 
3. BoYER DE FoxscoLOMBE, E, L. J. H. Description des pucerons qui se trouvent 
aux environs d'Aix. In Ann. Soc. Ent. France, x. 10, p. 157-198, 1841. 
Page 169. Aphis onobrychis oh. 
4. MosLEY, Oswald. Entomology, Genus, Apliis. In Gard. Chron. [v. 1], no, 42, 
p. 684, Oct. 16, 1841. 
5. Kaltexbach, 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. Xiinilx r-, 1857. 
7. BucKTON, G. B. Monogi'aph of the British Aphides, v. 1, p. J:)l-l:;5. London, 
1876. 
8. Ormerod, Eleanor A. Report of Observations of Injui'ious 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 puceron des pois ( Macrosiphum pisi Kalt. ). Sa biologic et les 
moyens de hitter centre liu.. 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, Ft. 
II. In Jour. Econ. Biol., v. 8, no. 3, p. 134-136, fig. 43, Sept. 29, 1913. 
12. Theobald, Fred V. Notes on the apliides of the cultivated peas {Piain sativum 
and Lathyriis 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.^ 
1878. Thomas, Cyrus. A list of the species of the tribe Aphidini, family Aplii<lae. 
found in the United States, wliich have been heretofore nametl, 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. 
• Dates in italics refer to the more important references. Dates preceded bj' an asterisk indicate papers 
which have been inaccessible to the writer. 
