86 
Transactions of the Boyal Society of South Africa. 
11. Howard, L. O. — "Experimental Work with the Fvmgous Diseases of Grass- 
hoppers/' ' U.S. Dept. Agric. Yearbook/ 1901, p. 459. 
12. Stockman, S. — ' The Agricultural Ledger/ 1903, No. 3, Calcutta. 
13. Burger, O. F., and A. F. Swain. — "Observations on a Fungus Enemy of the 
Walnut Aphis in Southern Calif./' ' Journ. Econ. Ent./ xi. No. 3, June, 1918. 
EXPLANATION OF PLATES II— IV. 
PLATE II. 
Fig. 
1. Empusa muscae, Cohn. Hyphal bodies from a still active fly. 
2. „ „ „ Hyphal bodies immediately after death of host. 
3. „ „ „ Hyphae from abdomen during conidia formation. 
4. „ „ „ Conidia, showing mass of protoplasm surrounding each. 
Two conidia forming secondary conidia. 
5. E. conglomerata, Sorokin. Conidia, one forming secondary conidium. 
6. „ „ Eesting spores (copied from Thax). 
PLATE III. 
Hyphal bodies from living grasshopper. 
Hyphal bodies immediately after death of host. 
Internal hyphae during conidia formation. 
Conidia, some forming secondary conidia. 
Conidiophores. 
Resting spores. 
PLATE IV. 
13. Entomophthora aphidis, Hoffman. Conidia and secondary conidia. 
14. „ „ „ Cystidia and rhizoids. 
15. E. apiculata, Thaxter. Conidia. 
16. „ „ Ehizoid. 
17. E. megasperma, Cohn. Conidia. 
18. „ „ Eesting spores and one of the peculiar empty hyphae 
that often accompany them. 
All figures, with the exception of No. 6, redrawn from camera lucida drawings, 
X 500. 
7. E. grylli, Fresenius. 
8. 
9. 
10. 
11. 
12. 
