INJURIOUS AND BENEFICIAL INSECTS. 251 



whether the weevil lies within. Now is the time to plunge 

 all the beans in hot boilino; water to kill the weevil — treatinsr 

 them just as gardeners have been accustomed to deal Avith the 

 well-known pea-weevil. Such beans as are found to be 

 affected should at once be burned. Again, as suggested bj 

 Dr. Harris, in dealing with the pea-weevil, "if the pease are 

 kept till they are a year old, the insects will leave them." 

 So that by keeping the seed for two years in tin boxes, or 

 other dry situations, where the weevil may come out and die, 

 without being allowed to go at liberty, the beans may be sown 

 with impunity. By the exercise of a little care, and by com- 

 bination among gardeners this pest may be kej)t under. 



The grub or larvfB occurred February 10th in different 

 stages of growth, the largest being one-seventh (.14) of an 

 inch long and about half as thick (.08). Other grubs were 

 only half as long. Some chrysalids oc- 

 curred also at this date while the adult 

 beetles were coming out of the beans. 

 The larva is a very thick, white, fleshy 

 grub (fig. 6) with the body much curved 

 and the head very minute and sunken in 

 the body. The rings are much flattened, ^s- e.— Grub of Bcan-weevu. 

 the sutures obscurely marked, and the rings are each divided 

 by a transverse line dividing it into two portions. There is a 

 distinct, flattened, lateral ridge. The end of the body is much 

 rounded and incurved. The head is white, becoming honey- 

 yellow about the short, stout jaws. 



One specimen was in the semi-pupa state, being intermedi- 

 ate between the larva and pupa. Its body was straightened 

 out, the head being at the extreme end and now quite prom- 

 inent, while before it was hidden in the soft body. The three 

 succeeding segments were full and swollen, the third being 

 very distinct from the succeeding one, the basal abdominal 

 segment. The whole body was much flatter and thinner than 

 in the grub. It was evident that the remarkable changes by 

 which it becomes transformed into the chrysalis state had begun. 



INSECTS INJTJEIOUS TO FRUIT AND FOREST TREES. 



Tlie Seventeen-year Locust. — This remarkable insect hav- 

 ing, after its long absence of seventeen years, again, as had 



