-18- 
A SCALE ( Chionaspis ortholobis Const.) 
California. H. J. Ryan (February 9): Reported on willow in Los Angeles County 
on January 17 . (Det. by V. E. Williams.) 
INSECTS AFFECTING GREENHOUSE 
AND ORNAMENTAL PLANTS 
BULB MITE ( Rhizoglyphus hyacinthi Bdv.) 
Washington. E. J. Newcomer (February 27 )s Reported as more numerous than usual 
on Easter lilies in a greenhouse at Yakima. 
CITRUS MEALYBUG ( Pseudococcus citri Risso) 
Nebraska. M. H, Swenk (February 24): Reported as attacking house and green- 
house plants in 1938 in Douglas, Kearney, and Sheridan Counties on November 
4, December 7. and December 30» respectively. 
JAPANESE MAPLE SCALE ( Leucaspis .japonic a Ckll.) 
Pennsylvania and Delaware. E. P. Felt (February 21): Specimens received from 
Philadelphia, Pa., recently. Twigs of privet covered with the scale and a 
number of tips dead. Infestation reported from Wilmington, Del. 
SOWBUGS (Oniscidae) 
Michigan. E. I. McDaniel (February f): Reported as doing considerable damage 
to celery and tomato plants under glass at Zeeland. This complaint more 
or less frequent from greenhouses at this time of year. 
Ohio, E. W. Mendenhall (February 27 ): Found in most greenhouses and damaging 
some plants. Control measures used. 
ARBORVITAE 
AEBORVITAE APHID ( Lachnus thu.jaf ilina Del G. ) 
Virginia. C. R. Willey (February 27 ): Apparently a general infestation in the 
Richmond area this winter and spring on various oriental types of arborvitae, 
particularly the compact varieties. It is possible that it may be bad 
as several years ago, ' ,,, hen it was very destructive, especially to the com- 
pact ’'golden” oriental types. 
