36 REPORT OF SEARCH FOR ENEMIES OF CITRUS WHITE FLY. 



our material to this country is seen in Plate IX. The base measure- 

 ment of the cases was approximately 2^ by 3-^ feet, while the height 

 varied from 4 to 5 feet. Three large holes were made in both ends of 

 the cases toward the top so as to allow a free exchange of air. These 

 holes were covered with fine brass gauze to prevent the escape of 

 insects. Two small doors were made in each case to be used when 

 watering the plants. These doors were kept open in good weather 

 during the voyage and a specially made fine wire-gauze screen placed 

 in the opening. The glass portion of the case was divided into small 

 sections, six on either side. Thick glass was deep set in the heavy 

 frames so as to reduce to a minimum the possibility of breakage en 

 route. 



A rack of half-inch boards rested on the bottom of the case, thus 

 keeping the plant jars from coming in direct contact with the bottom. 

 This helped to minimize the effect of sudden jolts as well as to allovT' 

 seepage of excess water when the plants were watered. Several auger 

 holes were bored in the bottom of each case. The earthenware jars 

 containing trees were tightly packed with a mixture of the fiber from 

 palm trees and sphagnum moss. Strips of boards were tacked over the 

 tops of the jars to keep them in place. The cases were made in sec- 

 tions held together by screws. They could be easily taken apart and 

 reassembled when needed. 



Cryptognatha flavescens/ the Predatory Enemy of the Citrus 



White Fly. 



During the autumn of 1910 a small reddish-colored lady-beetle was 

 found destroying the white fly at Saharanpur, India, and two ship- 

 ments of this species were made at that time to America. All insects 

 were dead on their arrival. 



Wlien the writer was carrying on an inspection of citiiis trees in- 

 fested by Aleyrodes, immediately following his return to Lahore in 

 May, 1911, his attention was soon directed to a very few larvae of this 

 coccinellid busily destroying the white fly. By May 9 the larvas had 

 become fairly numerous on parts of the infested hedge about which 

 work was centered. Very few adults were seen at this time. During 

 the last ten days of May adults had become numerous, while larvae were 

 seldom seen, which would indicate that the latter had reached 

 maturity. Careful observations were made June 11 to 14 and the 

 discovery was made that not only had all larvae disappeared, but the 

 adults as well with the possible exception of an occasional straggler 

 and these too disappeared during the latter part of the month. No 

 Coccinelhdae were seen during July, August, and September, but on 

 October 5 one adult and a few young larvae were found on young 



« This insect is mentioned in Indian Insects, by H. Maxwell-Lefroy, under the name Clanis soror, as 

 sAt&cking Aleijrodes sp. on castor (Ricinm sp.)- 



