Bui. 431, U. S. Dept. of Agriculture. 



Plate 



m^ 



7t 



O p 



r 



w X 



( i 



¥ 



WW JCX 



w 



zz 



Comparison of a Healthy Larva and the Remains of Larv/e Dead of 



Sacbrood. 



a, A cap of a healthy larva; &, e, d, e, and /, caps over larvce in first, second, third, fourth, and 

 fifth stages of decay, respectively; gr, a healthy larva, end view; /», i, j, k, and I, an end view 

 of the five stages of decay; ?», a healthy larva viewed from above; n, o, p, q, and r, cor- 

 responding view of the five stages of "decay; s and y, healthy larva removed from the 

 cell; t, u, V, 10. and s, larval remains in different stages of decay removed from the cell; 

 ijoio, a larva recently dead of sacbrood vnth the anterior third removed by the bees; x, a 

 scale removed from the cell; xx, larval remains from which a small portion has been 

 removed by bees; vy.almost a pupa; zz, a pupa dead of sacbrood which had only recently 

 transformed. (Original.) 



