252 BOARD OF AGRICULTURE. 



This insect is the Bruclms granarius of Lin- 

 naeus, and has long been known in Europe to be 

 injurious to stored beans. It closely resembles 

 the Pea Weevil (^Bruchus pisi, fig. 3,) of which 

 "an enlarged figure is introduced from our " Guide 

 to the Study of Insects," as it presents the gen- 

 FiG. 3. * eral outlines of the Bean Weevil. It is rather 

 smaller than the Pea Weevil, measuring .15 of an inch in length, 

 while the latter is .20 of an inch in length. Compared with 

 that insect it is lighter and more uniform in color, being of a 

 tawny gray, without the white spots so conspicuous in B. pisi. 

 The uniform tawny gray elytra are spotted with a few oblong 

 dark spots, situated between the strite ; the antennce also differ 

 in having the four basal joints more reddish than in B. pisi, 

 while the terminal joint is red, being blackish brown in B. pisi. 

 The fore legs are much redder, and the two hind pairs are red- 

 dish where they are dark brown in B. pisi. The spine on the 

 hind femora is smaller, but longer, and the antennas are flatter, 

 the joints being farther separated, and the whole body narrower 

 than in B. pisi. 



The pupa, (pi. 1, fig. 8 a,) is white, and measures .17 of an 

 inch in length. The head is laid upon the breast, the red tip 

 of the mandibles reaching to the base of the tarsi of the first 

 pair of feet. The two front pair of legs are folded on the breast 

 at right angles to the body ; the tarsi of the second pair reach- 

 ing a little beyond the anterior third of the body, while the hind 

 pair are concealed beneath the wings. The elytra are laid along 

 the side of the body, directed obliquely downwards, and are 

 marked with deep longitudinal ribs ; the under or hind pair of 

 wings, which are much narrower than the elytra, project beyond 

 the elytra, nearly meeting on the median line of the body. The 

 eyes are dark and conspicuous, being red, horse-shoe like spots. 

 The antennae are laid upwards and backwards on the base of the 

 elytra and behind the legs. The tip of the abdomen is smooth 

 and unarmed. Length .17 of an inch. 



The chrysalis lies in a cavity in the bean just large enough to 

 receive its body, there being as many as eight or twelve in a 

 single bean. (See pi. 1, fig. 8.) This cavity is indicated by a 

 round, sometimes oval semi-transparent spot .08 of an inch in 

 diameter ; the insect escaping through a thin orbicular almost 



