Puate XIII 
Fig. 50. Phyllophaga adults attacked by a fungous disease (due to Isaria 
farinosa). Naturai size. 
Fig. 51,52. Early stages of Metarrhizium anisopliae infection, the white my- 
celial threads appearing at joints of body. 
Fig. 53. A later stage of Metarrhizium, the green spores beginning to ap- 
pear. Natural size. 
Fig. 54. Matured green Metarrhizium spores covering body of beetle. 
Fig. 55. The same covering body of a Cotalpa lanigera grub. Note charac- 
teristic beads of liquid accumulating just back of the head. Natural 
size. 
Fig. 56,57. White-grubs and Promachus larva covered with white mycelial 
threads of Metarrhizium. Natural size. 
