Bul. 1, new series, Div. of Entomology, U. S. Dept. of Agriculture. 
Eig.2% 709. 
PTE 
Sos hereeh toxaceeay 
¢ 
IRL 1 
{ 
fo 
4 
asnars Tear mets Cahn teal 
Asa 
BACILLUS ALVEI (Cheshire). 
[Drawn from nature by Frank R. Cheshire for Jour. R. Mier. Soc., and here reduced one- 
sixth from the original plate. | 
Fic. 1.—Residue of larva three days dead of bacillus alvei; b, bacilli. Spores and degener- 
ated trachee cover the field. : 
Fic. 2.—Healthy juices of bee larva. 
Fig. 3.—Juices of larva (iving) with disease in acute stage; a a, leptothrix forms. 
Fig. 4.—Brood cells from a diseased colony: a a, cells containing healthy pupe: b b, 
sunken and punctured cells in which pupz have died. 
Fig. 5.—Cultivation in sterilized agar-agar showing the colony form of bacillus. 
Fic. 6.—Same cultivation twenty-four hours later. 
Fic. 7.—Spore changing into bacilli. 
Fic. 8.— Bacillus passing into spore condition. 
PLATE XI, 
