1018.] BASHAMBAR Das: The Aphididae of Lahore. 187 
often collects in very large globules inside the galls; the mealy coat of the insect 
protects it from becoming soiled with-honey-dew. 
Natural enemies.—The openings in the galls serve as passages for the exit and 
entrance of parasites and predaceous insects as well. 
A species of Lysiphlebus is extremely active in reducing its numbers, and there is 
always a large percentage of ‘‘mummified’’ and inflated dead or dying plant-lice, 
fastened to the surface of the leaves by the parasitic grub inside. Any number of 
the Lysiphlebus can be secured by placing pot plants or twigs under a bell jar; they 
copulate freely in captivity and parasitise other aphids by GE through the holes 
in the galls. , 
Small Coccinellids of the genus Scymnus act as useful checks, and the flocculent 
larvae of the one spotted Scymnus are always quite abundant. 
Systematic.—It has been suggested to me by an American correspondent that 
probably this Chenopodium Aphid is the same as Aphis chenopodii, Schrank.' But both 
Schouteden (Cat. Belgian Aphids, 1906) and Buckton (/.c. III, p. 37, pl. xlv) 
consider the latter a synonym of A. atriplicis, Linn., and the description of atriplicis 
as given by Buckton (Monog. Brit. Aphids, 1887) certainly differs very much from 
that of the Punjab insect. Provisionally, therefore, I have retained it as Schrank’s 
species. Furthermore, it does not belong to the genus Aphis but to my new genus 
Brevicoryne. 
It is also possible that a new genus of Del Guercio, Uvaphis-H. ayhurshtia (Patch, 
Host Index of World’s Aphididae , 1913) of which the type is A. atriplicis, might turn 
otit to be the same as Brevicoryne. In that case Del Guercio’s name should have pri- 
ority. The Italian work is at present inaccessible to me in India. 
Brevicoryne (Aphis) brassicae (Linn.) 
(European Brassica plant-louse). 
Literature :— 
Buckton, Brit. Aphids, II, p. 33 Ras): accurate colour description and plate. 
Essig, Pom Coll. Jour. Entom., III, 3, p. 323 (1911) ; illustrated detailed account. 
Herrick, Jour. Econ. Entom., IV, pp. 219-224 (1911) ; life-history and methods of control. 
Ind. Mus. Notes, II, 6, p. 167. : 
Lefroy, Ind. Ins. Life, p. 747 (1910). 
The Agricultural Department of India have also issued a coloured plate for popular purposes. 
There are numerous other references to this well-known and cosmopolitan species 
of plant-lice since Linné first gave it a name in Syst. Nat. 
The insect in Lahore has been found rather Bey on a few occasions either 
1 it is rare certain that the species described above by Mr. Das is identical with A Aphis cheno- 
podii, Schrk., of which species we have a fairly good description by Kaltenbach (Die Pflanzenläuse, 
1843, p. 107). Kaltenbach mentions as a synonym 4 phis atriplicis, L., and this name being older must 
have priority. The Aphis atriplicis of Fabricius is only one of the numerous synonyms of Aphis 
rumicis, L. 
I have received specimen of Brevicoryne (Aphis) atriplicis, L. from Mr. J. J. Davis of Lafayette 
(Ill. U.S. A.), which entirely agree with the descriptions furnished by Mr. Das. P.v.d.G.]. 
