10 

Via. 2.—Empusa musere, Cohn. A, a dead fly killed and surrounded by a haloof spores. 
B, spores; a, surrounded by protoplasm; b, without the same. C, germinating spores 
forming secondary spores. D, Empusa cells forming tubes. F, partly diagrammatic 
representation of the fructification; v7, the skin of the fly; y, hairs of the fly; atathe 
ends of the hyphz breaking through the skin and bearing spores; b, the hyphw-tubes 
still in the body; ¢c, tubes not yet reaching the skin; d, spores thrown off and adhering 
to hairs, some already forming secondary spores. After Brefeld. 

Fia. 3.—Silkworms affected by Pebrine—A. Healthy silkworm. B. Diseased silk- 
worm. C. Spinning glands of a diseased silkworm, with knotty swellings. D. Micro- 
coccus ovatus Lebert, the fungus causing disease; a, single cells; b, cells in the act of 
self-division. After Lebert. 
