SPRING NUMBER 59 
aphid, until Pergande (30) discovered that these were simply 
varieties of the one species, Aphis gossypii. 
It has a number of other hosts also including many garden 
crops, flowers, weeds etc. The preferred food plants however are 
those belonging to the melon family. Many of these are listed as 
hosts for Florida in the preceding list. Others are reported by 
Chittenden (5) and Quaintance (32). ‘About thirty different 
plants are mentioned as hosts. The insect also has a wide range 
of distribution both in the United States and other countries. 
Sanderson (33) says the melon aphid is found throughout this 
country, southward through Central America, and is usually 
more destruetive in the South than in the North. Chittenden (5) 
gives its distribution as the West Indies, Mexico, Brazil, and 
doubtless elsewhere in South America, and generally distributed 
throughout the United States, but more injurious in the South- 
west than elsewhere. 
Seasonal Occurrence. This louse was found early in the fall 
feeding on orange trees and continued to live there throughout 
the fall or until December. They then disappeared and were not 
seen on the oranges again until the following April. During the 
winter however they appeared in large numbers in the greenhouse 
on young orange trees and for several weeks continued to breed 
so rapidly as to nearly kill the tender shoots of the trees. They 
collected on the new growth, causing the leaves there to curl up 
and become deformed. This continued until the latter part of 
March when there was a notable decrease in numbers in the 
greenhouse and by the middle of April none of them were pres- 
ent. They gradually disappeared, seeming to migrate as fast as 
they became adult. About this time the form of the species 
known as the melon aphid appeared on some calabash plants 
growing in another section of the greenhouse, and lived there 
for a short time. 
In February they were collected outside on moonflowers, and 
in April appeared on the orange trees outside, where they lived 
for a short time and then evidently migrated to the melons. Dur- 
ing the first part of April the species was present on Easter lilies 
in large numbers, but here, also, lived for only a short period. 
From the time the cucumbers began to grow in April Aphis 
gossypui lived on cucurbitaceous plants. It was never difficult to 
find them in fields of cucumbers, melons, squash, or cantaloupes, 
and often their presence was very noticeable. They continued to 
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