390 



in agreement with Schouteden that it is only Kaltenbach's 

 species. 



Buckton's specimens were obtained from Keteringham, 

 some few miles distant from Norwich, where Mr. Barrett found 

 them during two successive Septembers feeding on the green 

 seed-pods of the Vetch, Vicia sepium. I have only found it at 

 Wye and Faversham in Kent, and at Widdington in Essex, 

 in any numbers, on cultivated peas. 



The object of this paper is to show that Macrosiphum pisi 

 of Kaltenbach is a distinct species, and to reinstate Koch's 

 Siphonophora gei at the same time, and above all to fix the 

 identity of the European Green Pea Louse, which is not the 

 nlmariœ of Schrank, but the species described by Kaltenbach 

 as pisi. 



Some Previous Observations of the Pea Aphides. 



Curtis {Farm Insects, p. 493) refers to the Pea Aphis as 

 Aphis vicicB Fabricius and A. pisi Curtis. 



He found a green Aphis in abundance in May and June 

 on vetches, and in mid- J une on grey peas ; in the beginning of 

 July winged females appeared, " and were no less plentiful 

 on the bloom," says Curtis. 



Curtis refers to the winged male as being black or brown ; 

 antennae longer than the body ; femora and tibiœ more or less 

 yellow towards the base. 



This is evidently not the male of M. pisi Kalt., and is 

 probably Aphis rumicis. 



Ormerod {Ninth Rept. Inj. Ins., p. 62, 1886) refers to a bad 

 attack at Kingsnorth, Kent, the Dolphin appearing about the 

 time the first flowers expanded. On July 24th the peas were 

 €ut, and it was noticed that the Aphides fell until the ground 

 was covered with them, and they crawled up every available 

 plant, giving a superficial resemblance to the green flower-head 

 of some orchidaceous plant. The insects nearest the stem 

 were noticed to be lice, closely packed, frequently two or three 

 layers thick, and then outside these a coat of " fly," with their 

 heads all pointing upwards. Next day all the fly and the greater 

 part of the lice had disappeared. Tares were also attacked. 



