HEMIPTERA 1095 



cydoniae Fitch, Corythucha Fam. Tingitidae 



Synonyms Corythucha arcitata Comst., C. crataegi O. & D. 



Hosts Crataegus, Cydonia. 



Injury Nymphs and adults suck juice from leaves, causing them to turn brown. 



Distribution North America. 



References Fitch, A. Country gent. 17: 25. 1861. 



Comstock, J. H. U. S. Ent. Kept. 1879:221. 1879. 



Gibson, E. H. Amer. Ent. Soc. Trans. 44:87. 1918. 



dearnessi King, Phenacoccus Fam. Coccidae 



Synonym Phenacoccus betheli Ckll. 

 Hosts Crataegus, Amelanchier. 

 Distribution Canada, United States, 



Reference Ferris, G. F. Contribution to knowledge of Coccidae of southwestern 

 United States, p. 68. 1919. 



dislocatus Say, Horcias Fam. Miridae 



(See page 1054.) 



dumetorum Schiff., Physatocheila Fam. Tingitidae 



Hosts Crataegus oxyacantha, Pyrus communis, Prunus padus, P. spinosa. 



Distribution Europe, Egypt. 



References Kaltenbach, J. H. Pflanzenfeinde, p. 213. 1872. 



Saunders, E. Hemiptera of British Islands, p. 135. 1892. 



edentula Buck., Aphis Fam. Aphididae 



Host Crataegus oxyacantha. 



Distribution Europe. 



Reference Buckton, G. B. Monograph of British aphides, 2:39. 1879. 



fitchi VanD., Idiocerus (Black apple leaf hopper) Fam. Cicadellidae 



Synonym Idiocerus maculipennis Fitch. 



Hosts Crataegus, Malus, Pyrus. 



Injury Adults and young suck juice from foliage. Not commonly injurious. 



Distribution North America. 



References Van Duzee, E. P. Catalog of Hemiptera, p. 580. 1916. 



Brittain, W. H., and Saunders, L. G. Can. ent. 49:149. 1917. 



flavicephala Coding, Ophiderma Fam. Membracidae 



(See page 1063.) 



furfura Fitch, Chionaspis (Scurfy scale) Fam. Coccidae 



Hosts About 25 tree species, including Crataegus, Malus, Pyrus, Cydonia, Sorbus. 

 Injury Occasionally incrusts bark of trees and greatly weakens or kills them. 

 Distribution North America. 

 References Slingerland, M. V., and Crosby, C. R. Manual of fruit insects, p. 176. 



1914. 

 Essig, E. O. Injurious and beneficial insects of California, p. 158. 1915. 



hederae Vail., Aspidiotus Fam. Coccidae 



Synonym Aspidiotus nerii Bouch6.- 



Hosts Many woody and herbaceous plants, including Crataegus azarolus. 

 Distribution Europe, Asia, North Africa (on Crataegus in Algeria), North America. 

 References Lindinger, L. Die Schildlause, p. 213. 1912. 



Sorauer, P. Handbuch der Pflanzenkrankheiten 3:689. 1913. 



lachrymalis Fb., Idiocerus Fam. Cicadellidae 



(See page 1061.) 



