288 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Yol. It 
by a Cladosporium, but when examined under the microscope they 
were found to be filled with dark brown spherical bodies about 30 
microns in diameter. These spherical bodies are believed to be the 
resting spores of the fungus. An attempt was made to germinate the 
resting spores but with no success. 
Entomophthora chromaphidis n. sp. 
Conidia bell-shaped with broad truncate base and sharply pointed apex; 11-14 
microns by 10-11 microns; usually containing a single large oil globule, and sur¬ 
rounded after discharge by a mass of protoplasm. Conidiophores simple or com¬ 
pound; broad at the apex and gradually tapering to a narrow base; producing white 
or brownish masses which may or may not coalesce over the body of the host. Sec¬ 
ondary conidia oval with rounded apex and formed by direct budding from the 
primary spore. 
Resting spores, azygospores, brown, 30 microns in diameter. Host attacked 
by rhizoids. 
Host: Chromaphis juglandicola (Kalt.), Psocus sp. 
Habitat: California. 
Explanations to Plate 9 
Fig. 1. The fungus growing from the body of an aphid making a white fringe. 
Fig. 2. A discharge spore embedded in the ejected mass of protoplasm. 
Fig. 3. A discharge spore producing the secondary spore. 
Summary 
1. In the spring of 1917 the walnut groves of Southern California 
were heavily infested by Chromaphis juglandicola (Kalt.). 
2. Although a period of extreme heat in June, and the presence of 
numerous insect enemies throughout the season were responsible 
for the death of a large percentage of these aphids, it was noted that 
a fungus also contributed to their mortality. 
3. Before the period of extreme heat, in El Monte, as high as 88 per 
cent were killed by this fungus ( Entomophthora chromaphidis n. sp.). 
4. Some time after this period of extreme heat, the aphids increased 
rapidly but under the conditions noted were effectively controlled by 
this fungus. 
President G. P. Weldon: This paper is now before you for dis¬ 
cussion. 
H. S. Smith: Have you tried to infect the aphids artificially with 
this fungus? 
O. F. Burger: No opportunity was presented during the past year. 
H. S. Smith: Do fungus enemies control the white-fly in Florida? 
O. F. Burger: In certain instances, as at Datonia where more or 
less close observations were made, fungus enemies did seem to control 
