19 
BEANS. 
Bean-seed Beetle. Bruchus granarius, Curtis; Bruchus rujimanus , 
Boll. 
Bruchus rufimanus and b. pisi. 
1 and 2, Bruchus rujimanus , nat. size and magnified; 3, infested Bean; 4 and 5, 
maggots ; 6 and 7, pupae, nat. size and magnified ; 8, Bean injured by beetle ; 
9 and 10, Bruchus pisi, nat. size and magnified; 11, injured Pea. 
Amongst the many insect-attacks which were unusually wide¬ 
spread and severe during the last year, that of the Bean-seed Beetle 
was one of the first to be reported. The mischief caused by this 
beetle is from the maggots feeding in the seeds of various kinds 
of Broad or Tick Beans, and thus lessening their value by weight for 
sale, and also their value for seed, as, where much is eaten away, the 
growing power of the young plant from the damaged seed is also 
lessened. 
The method of attack is for the Bean-seed Beetle to lay its egg on 
the young seed-vessel in the Bean-blossom before this is large enough 
to be called a pod, and from these eggs the maggots hatch, which 
presently pierce into the growing Beans. Then each maggot gnaws a 
gallery for itself, and there, amongst the dust and dirt (consequent on 
results of its feeding) which remain in the closed-up tunnel, it turns 
to the chrysalis, and thence to the beetle-state. 
The maggots are fleshy, wrinkled across, and with a small, horny, 
rusty-coloured head. As far as I am aware, they are legless, but in 
the case of some specimens of Bruchus -maggot which I took out of 
S. African Beans, I found the rudiments of feet on the front segments. 
c 2 
