Bui. 1117, U S. Dept. of Agriculture. 



Plate I. 



Entomophthora fumosa. 



1, Group of conidiophores, showing conidia in various stages of formation, X 164. 2-8, Co- 

 nidia, X 655. 9, Hyphal bodies, showing appearance when mounted in alcohol, X 655. 

 10, Hyphal bodies, showing nuclei, X 605. 11, Resting spores, X 655. 12, Germmation of co- 

 nidium,' showing capUlary-Uke germ tubes upon which secondary conidia are formed, X 332. 

 13, "Germinating" hyphal body, X 332. 1-4, Encysted hyphal bodies sometimes associated 

 with resting spores, X 332. 15," Resting spore crushed, showing inner hyaline endospore, 

 X 655. 16, Hyphal bodies as seen in a water mount. Taken from live mealybugs, X 655. 

 17, Hyphal bodies in leg of mealybug, X 164. 18, Resting spore with associated hj'phal 

 bodies, X 655. 19, Optical cross section of maturerestingspore, X 655. 20, Group of geriiiina- 

 ting hyphal bodies, X 6.55. 21, Grapefruit, showing diseased mealybugs and discharged 

 conidia of fungus on surface of the fruit. One-half natural size. 

 4543—22 2 



