24 REPORT OF SEARCH FOR ENEMIES OF CITRUS WHITE FLY. 
as far to the north in the Upper Shan States on the Chinese border, 
the limited time at the writer's disposal rendered it inadvisable to 
explore these distant and very inaccessible regions. Instead return 
was made to Rangoon, where a steamer was boarded en route to Java 
via Penang and Singapore. 
Batavia was reached on January 16 and a few days were spent 
hereabouts in making short journeys into the surrounding country. 
To the biologist visiting Java, the one place to which his attention is 
particularly directed is Buitenzorg, the seat of the far-famed Botanical 
Garden, which is situated about 60 miles from Batavia, the capital 
and principal seaport of the island. After having acquired a knowl- 
edge of Batavia and its surroundings, naturally the next move was to 
proceed to Buitenzorg. Itself most beautiful and surrounded by 
equally attractive country, this locality is a veritable tropical para- 
dise. The garden is immediately adjacent to the city. Its great 
variety of plants, beauty of arrangement, and size would place it in the 
foremost rank of the botanical gardens of the Tropics, while the 
extensive and well-equipped laboratories for research, as well as a 
splendid museum, probably afford the investigating biologist a com- 
bination of desiderata unsurpassed in the Tropical Zone. 
Orange and grapefruit trees occur in the garden and are found 
scattered throughout the surrounding country. A week was spent 
in this locality, during which many trees were examined, yet without 
evidence of the citrus white fly. 
Through Mr. Max Wigman, botanist of the Buitenzorg Gardens, 
detailed information was secured relative to the localities in Java in 
which citrus trees were most prevalent. Utilizing this information 
during the following two weeks the journey was continued through 
the western half of the island. Orange and grapefruit occur through- 
out this region, the plantings for the most part consisting of scat- 
tered trees along the roads and paths or in gardens about the native 
houses. 
At no time during the writer's travels in western Java were there 
seen as many as a hundred orange or grapefruit trees in a single 
orchard. 
The citrus fruit trees were attacked by a number of insect pests, 
but no evidence of Aleyrodes citri could be found. So many trees 
were examined in different parts of the island that it would seem a 
safe conclusion that the citrus white fly does not occur in Java. 
Leaving Java early in February (1911) a boat was taken to Singa- 
pore, where transfer was made to a steamer sailing direct to Hong- 
kong. On arrival at the latter port a cablegram was received from 
Dr. Howard advising that a return trip be made to India and that 
effort be made to secure living material of the two natural enemies 
