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 tune 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 vdsiting 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 mUes 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. 



Leavmg 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 



