10 BEAN, 
On examination of the infested Beans, I noticed a difference in the 
method of maggot-attack (see pp. 25, 26 of ‘South African Insects ’) 
from that of our B. rwfimanus. Instead of the maggot-tunnels ending 
as soon as they came to the outside of the Bean, I found that they 
sometimes ran on just under the skin, so that their shape and the 
blackish colour of the insects when developed to the beetle state could 
be distinctly seen through the thin transparent coats of the Bean. 
Also, in some instances, it appeared from the gnawings that the 
maggot had made, or might have made, its entrance into the seed from 
the outside. 
On microscopic examination, I found the larva of this South 
African Bean-seed Weevil (the B. faba, Riley,= B. obtectus, Say) to be 
not only, as is commonly the case with maggots of the Bruchi, much 
corrugated, but also that the three segments next the head were dis- 
tinctly divided from each other, and that each of these segments was 
furnished with a pair of appendages placed in the common position of 
feet, and, as far as I could see, answering the purpose of the three 
pairs of claw-feet which are found in many beetle grubs. The appen- 
dages appeared to me to be one-jointed, and slightly conical or curved.* 
The specimens, being dried, were not in a wholly satisfactory state for 
examination ; but in connection with the foot speenatine, of which the 
observations by Prof. Riley are given at p. 8, it would be of much 
interest to have further observations, which élie recent appointment of 
a skilled Government entomologist in Cape Colony has now rendered 
conveniently practicable. 
Injury from infestation to de imeeeie amount of this is much 
the greatest in the case of the American and African Bean-seed Beetle. 
Where the whole contents of the Bean are destroyed, the mischief 
done is beyond question.- But this weevil, having in ordinary course 
the habit of not only destroying much of the future seed-leaves, but of 
at times totally destroying the germ, is an especially injurious Bean 
pest. The following extract from detail of experiment at Kansas 
State Experiment Station on weevilled Beans gives useful information 
on this point :-— 
‘‘ Wifty per cent. started; of these three-fifths might have grown 
into plants, as the injury was restricted to the seed-leaves. But the 
remaining two-fifths were variously mutilated by the loss of a part or 
the whole of the germ or plumule, so that under no circumstances 
could they have made plants. Here then but thirty per cent. could 
have passed the germinating stage, and these, owing to more or less 
considerable injury to the seed-leaves, would probably have made 
plants of low vigour. In a check lot of perfect Beans of the same 
* See ‘Injurious Insects of South Africa,’ by Ed. (previously cited), pp. 25, 26. 
