1100 HEMIPTERA THYSANOPTERA COLEOPTERA 



Distribution Europe, North America. 



References Van der Goot, P. Hollandischen Blattlause, p. 177. 1915. 



Matheson, R. Cornell Univ. Agr. Exp. Sta. Memoir 24:718. 1919. 



suturalis Fb., Idiocerus Fam. Cicadellidae 



(See page 1062.) 



taurina Fitch, Ceresa Fam. Membracjidae 



(See page 1063.) 



ulmi Linn., Lepidosaphes (Oyster-shell scale) Fam. Coccidae 



Synonym Mytilaspis pomorum Douche 1 . 



Hosts Many woody plants, including Crataegus. 



Injury Sucks juice from bark and foliage. 



Distribution Europe, Asia, Africa, Australia, North America, South America, Hawaii. 



References Theobald, F. V. Insect pests of fruits, p. 170. 1909. 



Sorauer, P. Handbuch der Pflanzenkrankheiten 3:692. 1913. 



ulmi Geof., Tetraneura Fam. Aphididae 



Hosts Ulmus, Crataegus oxyacantha, many grasses. 



Injury Sucks juice from leaves, causing galls to form on upper surface. 

 Distribution Europe. 



References Van der Goot, P. Hollandischen Blattlause, p. 484. 1915. 

 Patch, E. M. Maine Agr. Exp. Sta. Bui. 270:49. 1918. 



univittatus Knight, Lygus Fam. Miridae 



Host Crataegus. 



Injury Adults suck juice and puncture fruit and tender foliage. 



Distribution Northeastern United States. 



Reference Knight, H. H. Brooklyn Ent. Soc. Bui. 14:21. 1919. 



urticae Linn., Trioza Fam. Psyllidae 



Hosts Urtica, Crataegus oxyacantha. 



Injury Sucks juice from foliage. 



Distribution Europe, Asia. 



References Aulmann, G. Psyllidarum catalogus, p. 56. 1913. 



Harrison, J. W. H. Naturalist (London), no. 707, p. 400. 1915. 



vanduzei Gill., Eupteryx Fam. Cicadellidae 



(See page 1062.) 



vilis Linn., Pulvinaria (Cottony scale) '. Fam. Coccidae 



Synonyms Pulvinaria betulae Linn., P. innumerabilis Rath., P. oxyacanthae Linn. 

 Hosts Many woody plants, including Crataegus. 

 Injury Sucks sap from bark and tender shoots. 

 Distribution Europe, America, Africa, Asia Minor. 

 Reference Lindinger, L. Die Schildlause, p. 215. 1912. 



vulgaris Fb., Lamenia Fam. Cicadellidae 



(See page 1063.) 



THYSANOPTERA 



tritici Fitch, Euthrips Fam. Thrypidae 



(See page 1066.) 



COLEOPTERA 



aeneovirens Marsh, Rhynchites, var. punctatits Oliv Fam. Curculionidae 



Host Crataegus oxyacantha. 



Distribution Europe. 



Reference Bargagli, P. Rincofori Europei, p. 181. 18S3. 



