10 Ittinois NATURAL History SuRvEY BULLETIN 
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RECORDS OF 
CERATOCAPSUS 
TAXODI! CNN \é 
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CYPRESS, TAXODIUM 
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Fig. 10.— Outline map of I]linois showing the 
distribution of Ceratocapsus taxodii and its 
exclusive host, cypress. 
individuals that are at the edge of a clearing, 
right at the edge of a woods or isolated in 
the surrounding herbaceous growth. This 
condition has been found true especially of 
the species infesting oak and ash. Sweeping 
in dense woods seldom netted many speci- 
mens, but that at odd trees at the edge of 
the woods frequently resulted in the collec- 
tion of great numbers of the bugs. This be- 
havior characteristic probably explains why 
Miridae sometimes become very abundant in 
street and ornamental plantings of such trees 
as. ash. 
Certain forest Miridae are exceptions to 
this general habit. One of our best examples 
is Dicyphus gracilentus Parshley, which 
feeds on the herb Polymnia canadensis; this 
bug inhabits deep, shady woods, to which its 
host is also confined. 
We have found collecting of mirids infest- 
ing trees and shrubs especially profitable in 
the Jo Daviess hills, fig. 34, in extreme 
Vol 224 ricel 
northwestern Illinois, and in the Ozark hills, 
fig. 3H, in extreme southern Illinois. The 
Jo Daviess hills are forested and rolling, 
contain species of Crataegus not found far- 
ther south and support a flora more varied 
in nature than most other Illinois areas. 
The Ozark hills of southern Illinois are a 
continuation of the Ozarkian uplift of Okla- 
homa, Arkansas and Missouri, and have 
many species of trees, shrubs and herbs that 
are much more luxuriant there than in other 
Illinois areas. These species include such 
forms as alder, red cedar and cane. 
Wooded glens especially profitable for 
mirid collecting occur in several places near 
the eastern border of the state, fig. 3G. 
Grass and Marsh Mirids 
Certain groups of Miridae, notably the 
subfamily Mirinae, feed on grasses and some 
of the sedges and rushes. Some of these 
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@ DisrrisuTion 
RECORDS OF a 
LYGUS OBLINEATUS 
KB, DISTRIBUTION OF <! 
HOSTS OF LyGUS 
OBLINEATUS 
Fig. 11.—Map of Illinois showing distri- 
bution of the tarnished plant bug, Lygus 
oblineatus, which feeds on a wide variety of 
plants. 
