THE INSECT FAUNA OF THE GENUS CRATAEGUS 



1063 



vulgaris Fb., Lamenia 



The adults of Lamenia vulgaris are 4 millimeters long, bluish gray, and 

 rather stout. They are abundant on native hawthorns during the last 

 half of June. 



Membracidae 

 crataegi Fitch, Glossonotus (Hawthorn tree hopper) 



The adults of Glossonotus crataegi are fairly common on the branches of 

 n'ative hawthorns' during July and early August. 



flavicephala Coding, Ophiderma 



The adults of Ophiderma flavicephala are 8 millimeters long, are brown 

 with a yellowish white stripe on each side and across the rear end of the 

 prothorax, and are without a hump. They are rarely found on the branches 

 of Crataegus punctata and C. tomentosa during June. 



taurind Fitch, Ceresa 



The adults of Ceresa taurina are 8 millimeters long, are pale green, and 

 have the prothorax prolonged into a horn on each side of the head. They 

 are found occasionally on the branches of Crataegus punctata and C. 

 neofluvialis in late July and August. No nymphs were reared to the adult 

 stage on Crataegus, but several nymphs 

 answering the description of this species 

 as given by Hodgkiss (1910) hatched 

 on April 20 and lived through three in- 

 stars on Crataegus punctata foliage. 



Aphididae 



corrugatans Sir., Pemphigus (Woolly 



thorn aphis) 



A few colonies of the flocculent 

 greenish aphids of the species Pem- 

 phigus corrugatans were found in early 

 June on Crataegus punctata. They live 

 on the under side of the leaves arid curl 

 the leaf margins downward. 



crataegi Monell, Macrosiphum 



The apterous females of Macrosi- 

 phum crataegi may be found from late 

 May until October on the native haw- 

 thorns at Ithaca, and during July and 

 August the species may become so 

 abundant as to seriously injure the 



FlG. 108. MACROSIPHUM GRATAECI 



