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



Plate II. 



oo 



y 



k 



□ Q 



s 



t 



u- 



l> 



r"^""n 



W X 



y 



z 



WW 



JCX 



!/¥ 



zz 



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



Sacbrood. 



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

 fifth stages of decay, respectively; g, a healthy larva, end view; h, i, j, k, and I, an end view 

 of the five stages of decay; m, 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, w. and s, larval remains in different stages of decay removed from the cell; 

 WW, a larva recently dead of sacbrood with 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: i/.v. almost a pupa; cz, a pupa dead of sacbrood which had only recently 

 transformed. (Onglnal.) 



