1094 HEMIPTERA 
EN ALAEGUEViaTD) VIG TOCERUS ean wctere peat sy fake eerie se Ree ee ee Fam. Cicadellidae 
Host — Crataegus. 
Injury — Adults and young suck juice from foliage. 
Distribution — North America. 
Reference — Van Duzee, E. P. Can. ent. 22:110. 1890. 
crataeg?.Monell iMacnosiphiiuimaer een een eee ee ee eee Fam. Aphididae 
Hosts — Crataegus punctatz, C. coccinea, C. oxyacantha. 
Injury — Sucks juice from lower side of leaves and from tender twigs. Leaves curl 
downward and in severe infestations trees may be defoliated. 
Distribution — North America. 
Reference — Patch, E. M. Maine Agr. Exp. Sta. Bul. 233:255. 1914. 
(Fig. 108, page 1063.) 
Crataeg? mhullorsenOCtDhiLUs ie eae oR eee ae eee Fam. Aphididae 
Hosts — Crataegus oxyacantha, Malus. 
Injury — Curls and discolors leaves and sometimes injures blossoms. 
Distribution — Europe. 
Reference — Van der Goot, P. Hollindischen Blattliuse, p. 450. 1915. 
CROLMEG US CHEM eESY LO keer prea 2 tne de bonito aw a dane Fam. Psyllidae 
Synonym — Chermes quercus Thoms. 
Hosts — Crataegus oxyacantha, Quercus sp. 
Injury — Causes small red blisters to form on upper side of leaves. 
Distribution — Europe. 
Reference — Aulmann, G. Psyllidarum catalogus, p. 13. 1918. 
ChataegveD oles Ry pilocyUG merci ae oe oe ok ie ee ee Fam. Cicadellidae 
Hosts — Crataegus oxyacantha, apple (?). 
Injury — Nymphs and adults suck juice from foliage, but commonly they are not 
numerous enough to cause much injury. 
Distribution — Europe. 
References — Douglas, J. W. Ent. mo. mag. 12:203. 1876. 
Melichar, L. Cicadinen von Mittel-Europe, p. 348. 1896. 
crataegiella DheobaldivAmhiser. se sie Wake cele olde eee eee Fam. Aphididae 
Synonym — Aphis crataegi Buck. 
Host — Crataegus oxyacantha. 
Injury — Curls and discolors leaves of terminal shoots, which turn reddish brown. 
Distribution — Europe. 
References — Buckton, G. B. Monograph of British aphides, 2:35. 1879. 
Theobald, F. V. List of Aphididae of Hastings District, p. 9. 1912. 
cnaiaegifoliaeshitch.cAmhiste a he ee eee sods Ee eee Fam. Aphididae 
Hosts — Crataegus punctata, C. coccinea, C. oxyacantha, C. tomentosa, Cydonia, legumes. 
Injury — Curls and discolors leaves and young shoots, turning them purplish. 
Distribution — North America. 
Reference — Quaintance, A. L., and Baker, A. C. U.S. Agr. Dept. Farmers’ bul. 
804:18. 1917. 
cnataegus-coccined, Ralins. eA pisses oe ee eee Fam. Aphididae 
Host — Crataegus coccinea. 
Distribution — North America. 
References — Rafinesque, C. S. Amer. mo. mag. and crit. rev. 3:16. 1818. 
Patch, E. M. Maine Agr. Exp. Sta. Bul. 270:48. 1918. 
Curtis De Huscelisign ae oo. eis 8 Slarste ten Oa ea eH ee Fam. Cicadellidae 
(See page 1161.) 
