26 REPORT OF SEARCH FOE ENEMIES OF CITRUS WHITE FLY. 
possible successful operations. Not only were there a great number 
of citrus trees in this region, but the infestation of the white fly as 
well as the percentage of parasitism exceeded that of any other place - 
visited. This was also one of the few places in India in which 
young nursery trees were available in large numbers. Being also ( 
the seat of a large botanical garden which contained many citrus \ 
trees, it afforded excellent facilities for the purpose in hand, and ^ 
thus was the logical place in which to concentrate efforts. 
A stop was made en route at Saharanpur, where success had been '*- 
achieved the previous year in the collection of Cryptognaihajlavescens, 
the predatory enemy of the white fly. Diligent search this time 
revealed very few living Aleyrodes; so after employing from Mr. j 
Hartless, the superintendent of the garden, a "nioile" or gardener ' 
who had assisted the writer the previous year, the journey was con- 
tinued to Lahore. * ' 
A careful canvass of the orange and lime trees of the Lahore 
region was at once started in order to ascertain the prevalent condi- . 
• 
tion of the white-fly infestation. Several days of laborious endeavor 
covering much of this locality resulted in the finding of a very light or 
scattering infestation of living Aleyrodes. The number was so 
small as to be worthless for use in breeding or parasitic work. 
Confronted with this discouraging outlook, a trip was made to 
Gujranwala, about 50 miles north of Lahore and the greatest com- 
mercial orange-producing center in northern India. The condition 
of the white fly on citrus trees here was quite comparable with that 
at Lahore. Few living insects could be found, although the number 
of dead specimens on some trees was large. The previous autumn 
a small garden of an ornamental bush (Jasminum sarabac), whose 
flowers are valuable for making perfumed oils, was found surrounded 
by orange trees. These Jasminum bushes were severely infested '-; 
with Aleyrodes citri; hi fact, it was the most severe infestation seen i n 
in all India, so much so that the leaves were blackened with a crust 
of sooty-mold fungus. Ashe felt confident that this garden would > 
furnish a splendid breeding ground for the white fly, the discourage- . 
ment of the writer can be well imagined when on examining this 
garden it was found that the extreme temperature of the previous^ A 
winter had frozen back most of the bushes and almost eradicated the , I 
fly. Returning to Lahore, a most careful search was continued, with 
the ultimate result of discovering in one part of the botanical garden^ 
a well-protected hedge which was well infested with the white fly. fljj 
This fortunate discovery constituted the basis of future operations. 
Disco veey of Living Parasites. 
Immediate attention was next devoted toward the discovery of 
the parasite Prospaltella lahorensis, which the work of the previous j 
