Tue 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) 
clitellarius Say, Thamnotettix 
The adults of Thamnotettix clitellarius 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 
ereen. They are found on native hawthorns in July and August, but are 
not common. 
curtisit Fb., EHuscelis 
The adults of Huscelis curtisiz are small, 4 millimeters long, with many 
narrow yellow and black stripes. Specimens were found on June 23, 
but were not common. 
fitcht VanD., Idiocerus (Black apple leaf hopper) 
The adult of Idzocerus fitcht 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., [diocerus 
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 33 millimeters long, slender, pale 
green. They are found rarely on Crataegus in late June. 
obliqua Say, EHrythroneura 
The adults of Hrythroneura obliqua are 24 millimeters long, with the wings 
striped red and white. They are very abundant on the leaves of native 
