1014 I. M. Hawiey 
brown in color, is about 12 millimeters in length, and bears several hook- 
like spines on the end. This stage of the insect is usually passed above or 
below ground in a frail cocoon covered with particles of dirt. 
The moths of P. scabra, reared from larvae found on beans at Perry in 
July, emerged in cages from August 25 to October 1. Late in September 
there were many moths in the fields around the piles of drying beans. 
No eggs were deposited by moths in cages before they were killed by cold 
weather. 
The larvae found in a field at any one time vary greatly in size, and some 
larvae could still be found when moths were seeking hibernating p!aces. 
On September 9 larvae of all sizes were taken on beans, and more were 
found on ragweed on October 2. It seems probable that there are nor- 
mally two broods of this insect in New York, but that in long warm 
summers there may be a partial third brood. 
When the larvae of P. scabra appear in such large numbers that they 
threaten the bean crop, they may be controlled by a spray of arsenate of 
lead, 2 to 3 pounds of paste to 50 gallons of water. To insure the destruc- 
tion of all larvae, the under as well as the upper sides of the leaves should 
be covered. Sherman and Leiby (1920) found that the pest could be.con- 
trolled when feeding on soybeans by dusting the plants with a combina- 
tion of 1 part of powdered arsenate of lead to 8 parts of hme. The material 
must be applied as soon as the insects begin their work. A hand duster, 
geared to distribute two pounds to the acre, is recommended by these 
writers. 
On wax and string beans it is not always safe to apply a poison to the 
pods. ‘To kill the insects on plants of this type, a spray of Black-leaf-40 
(1 gallon to 750 gallons of water), with the addition of soap (8 pounds to 
50 gallons of water), should be used. For small gardens, a mixture of 
one teaspoonful of Black-leaf-40 and one ounce of laundry soap in one 
gallon of water has been found effective. As the larva is killed only when 
thoroly drenched by the spray, it is necessary to cover both the upper and 
the under sides of the leaves. 
THE BEAN WEEVIL 
(Acanthoscelides |Bruchus] obtectus Say) 
There is no other bean pest as well known and as much discussed in 
entomological literature as the bean weevil, Acanthoscelides obtectus (Cole- 
optera, Bruchidae) (fig. 98). It is not a field pest in New York, but, since 
it frequently causes great loss to beans in storage, a brief discussion of it 
may be justified in this paper. 
When beans that have been infested in the field are kept in a warm store- | 
room, the reproduction of the weevil continues, and generation after genera- 
tion develops in the stored seed. The same thing may happen when 
uninfested beans are put in a warm place where the weevils are already | 
