6 Farmers’ Bulletin 1275. 
Fic. 3.—Life cycle of a bean or pea weevil: 1, Cross-section of seed showing embryo or 
germ at a, and on upper left side an eggshell and the small burrow made by the newly 
hatched grub from the underside of egg into the seed; 2, 3, and 4, larva or grub in 
different periods of growth, the larva of 4 being full grown; 5, pupa or resting stage 
which is intermediate between the larva and the adult; 6, side view of beetle within 
the pupal cocoon and ready to gnaw the round hole in the seed coat so it can crawl 
out of the seed; 7, beetle has eaten a circular hole in the seed coat and is crawling 
out; note that this emergence hole is some way from the point of entry; 8, female 
beetle laying eggs upon the seed. j 
