THE INSECT FAUNA OF THE GENUS CRATAEGUS 1061 



The webs of these spiders sometimes cover the infested leaves of a tree 

 and entangle whole colonies of the lace bugs. The adults that survive 

 the winter are comparatively few, so that the first brood of C. bellula 

 does little injury. 



Cicadellidae (Jassidae) 



cliteUarius Say, Thamnotettix 



The adults of Thamnotettix cliteUarius are of medium size, 5 millimeters 

 long. They are yellow, with black wings which have a prominent yellow 

 spot. A few specimens were found on June 11. 



coccinea Forst., Graphocephala 



The adults of Graphocephala coccinea are 8 millimeters long, are slender, 

 with a pointed head, and have the wings striped with alternate red and 

 green. They are found on native hawthorns in July and August, but are 

 not common. 



curti$ii Fb., Euscelis 



The adults of Euscelis curtisii are small, 4 millimeters long, with many 

 narrow yellow and black stripes. Specimens were found on June 23, 

 but were not common. 



fitchi VanD., Idiocerus (Black apple leaf hopper) 



The adult of Idiocerus fitchi is 6 millimeters long, is brown or grayish 

 with oblique white marks, and is found on native hawthorns in July and 

 August. The black nymphs were reared on Crataegus punctata leaves 

 from June 14 to July 2. The species winters in the egg stage.. 



lachrymalis Fb., Idiocerus 



The adults of Idiocerus lachrymalis are 8 millimeters long, and are 

 brownish or grayish mottled, with dark venation. They occur on native 

 hawthorns in June and July. They are not common. 



lineatus Linn., Philaenus 



The adults of Philaenus lineatus are 6 millimeters long, brownish yellow, 

 stout with a pointed head, and with a small black spot near the apex on 

 the inner margin of the wing. They are found on native hawthorns from 

 July 1 to July 15, but are not common. 



mali LeB., Empoasca (Apple leaf hopper) 



The adults of Empoasca mali are 3J millimeters long, slender, pale 

 green. They are found rarely on Crataegus in late June. 



obliqua Say, Erythroneura 



The adults of Erythroneura obliqua are 2 \ millimeters long, with the wings 

 striped red and white. They are very abundant on the leaves of native 



