PHASEOLUS DERASUS 169 



particularly local, and during a few months of the year it 

 partially disappears. This is the only period when it is per- 

 missible to sow Leguminosaj, i.e., in the month of October. 

 At the same time, we have had occasion to notice that its 

 attacks are less prolonged in certain years. For instance, in 

 August, 1909, we sowed some beans which did remarkably 

 well. 



Although, at Reduir, the most favourable months for the 

 cultivation of the bean are October to November, the period 

 differs In other localities, not even being the same in 

 Reunion. 



Numerous remedies have been attempted : sprinkling with 

 soot, tobacco extract, and aqueous petroleum emulsions. Not 

 one of these means has either been a preventive or a cure. 



The only remedy, by no means an efficacious one, but 

 which tends to check the spreading of these diptera, is that 

 of pulling up the plants attacked and of burning them as they 

 shrivel and turn yellow. 



PHASEOLUS DERASUS. 



A bean which is a native of Brazil, commonly sold in 

 the state of husked seeds in the vegetable markets of Rio de 

 Janeiro. 



Flowers of a greenish white, small, and disposed in 

 pedunculate clusters springing from the axils of the leaves. 

 Seeds black with a white hilum. 



PHASEOLUS MULTIFLORUS. 



This is a climbing plant of South American origin ; it is 

 from 3 to 5 rnetres high and slightly pubescent. The flowers 

 occur in long clusters of fifteen to thirty, united in pairs, and 

 blooming consecutively. They are white, red, or of two 

 Gplours according to the variety. The pods number from 



