BEAN APHIS ; BEAN BEETLE. 5 



or other mineral oil, to the soft-soap wash would make the 

 application much more serviceable. For proportions that 

 may be safely used and method of preparation, see references 

 to " paraftin " and " emulsion " in Index. 



A healthy, luxuriant growth is also of importance. The 

 " Colliers " may attack the healthy as well as the unhealthy 

 plants, but the strong growth which is run on by previous good 

 cultivation of the ground, and also the application of a little 

 liquid manure if desirable, will keep the plant in heart with a 

 plentiful flow of sap, and thus it will suffer much less from 

 attack than the weakly, stunted growths that have no power 

 to replace the juices which the Aphides are constantly sucking 

 out of them. 



Eemoval of the wild plants on which this kind of Aphis is 

 to be found would probably materially lessen its numbers. 

 These " Colliers " or " Black Flies " are to be found in great 

 numbers on the Curled Dock {Rumex crispus, whence their 

 name of " rumicis''), and also on Thistles; and it is stated 

 (see ' Brit. Aphides,' vol. ii. p. 83) that the wingless egg- 

 producing female winters in Furze-bushes, the branches of 

 which may be found dotted with Aphis eggs. 



Bean Beetle. Bnichus granarius, Curtis ; B. rufimanus, Bob. 



1 and 2, Bnichus rufimanus, nat. size and mag. ; 3, infested Bean split open, 

 showing cell ; 4 and 5,'larviie, nat. size and mag. ; 6 and 7, pupa?, nat. size and 

 mag. ; 8, Bean injured by beetle, vegetating ; 9 and 10, Bruchus iiisi, nat. size 

 and mag. ; 11, injured Pea. 



