Cicadellidae 317 



merely by lifting the cage from one saucer to another. From 25 to 50 

 test beet leafhoppers may be confined in this cage without apparent over- 

 crowding." 



j. G. N. 



Family cicadellidae 



THE BEET LEAFHOPPER, EUTETTIX TENELLUS* 



THE adults were confined in a cylindrical cage (12 by 8 inches) with 

 top and sides covered with lawn, except for a glass plate (10 by 5 

 inches) through which observations were made. The bottom of each 

 cage was covered with denim fastened with a loop of copper wire. The 

 leaves of a sugar beet with the base of the petioles wrapped in cotton 

 projected through two central intersecting incisions in the denim. The 

 denim rested against 2 inches of dry sand covering the surface of the soil 

 in a 1 o-inch pot. The hoppers might be transferred rapidly to another 

 potted sugar beet by blowing a breath of air through the sides and by 

 jarring the cage, causing the insects to change their resting place from 

 the foliage to the cloth; the cage was then lifted so that the leaves pulled 

 through the incisions, leaving the bugs in captivity. This removal of the 

 cage from the potted beet was performed in a dark chamber provided 

 with a glass plate, outside of which was a 50-watt electric lamp covered 

 with a shade, so that any specimens which perchance remained on the 

 plant, resting between the petioles, were attracted to the light after the 

 cage was removed. The glass of each cage faced to the north in the 

 field. Each pot was placed in a saucer and the saucers were watered 

 daily during hot weather. To prevent ants from entering the cage, the 

 sides of the saucer were smeared with tanglefoot. 



M. E. D. 



Family chermidae 



CULTURE METHODS FOR THE POTATO PSYLLID 



George F. Knowlton, Utah Agricultural Experiment Station 



THE potato psyllid, Paratrioza cockerelli, yields readily to domestica- 

 tion in the laboratory, when suitable cultural methods are used. 

 Collecting Methods. A colony of potato psyllids may be readily estab- 

 lished by collecting large nymphs upon potato or matrimony vine leaves, 

 and then transferring them to vigorous young potato plants in the labora- 



*Abstracted from an article in Univ. of Calif. Pub. in Ent. 5:37. 1930, by Henry 

 H. P. Severin, University of California. See original publication for illustrations of 

 equipment. 



