’ 
HOST LIST 
Most species of Miridae are restricted to a 
single host plant or to a few closely related plants. 
Notable exceptions include the tarnished plant 
bug, Lygus oblineatus (Say), which may be found 
on almost any plant, and Plagiognathus politus 
Uhler, which occurs on a great many herbaceous 
plants. Both are so common and so diverse in 
their feeding habits that, to prevent repetition, 
neither is included under the various hosts in the 
following list. A number of mirids are predacious, 
but are associated with definite species of plants; 
in this list such mirids are indicated by an asterisk 
(*). Other species are possibly or probably pre- 
Acer negundo 
tParacalocoris scrupeus (Say), 177 
Plagiognathus negundinis Knight, 33 
Acer rubrum 
Coccobaphes sanguinareus Uhler, 138 
Neolygus vitticollis (Reuter), 162 
Acer saccharinum 
Neolygus vitticollis (Reuter), 162 
Acer saccharum 
Coccobaphes sanguinareus Uhler, 139 
Microphylellus elongatus Knight, 42 
Neolygus hirticulus (Van Duzee), 163 
Neolygus vitticollis (Reuter), 162 
+Phytocoris corticevivens (Knight), 186 
Acer spicatum 
Neolygus belfragii (Reuter), 162 
Acer sp. 
*Deraeocoris nebulosus (Uhler), 67 
{Diaphnidia pellucida Uhler, 92 
*Phytocoris conspurcatus Knight, 188 
Achillea millefolium 
Lopidea heidemanni Knight, 88 
Achillea sp. 
tAdelphocoris rapidus (Say), 174 
Agropyron repens 
Capsus ater (Linnaeus), 138 
Alder; see A/nus 
Alder, smooth; see 4/nus rugosa 
Alder, speckled; see 4/nus incana 
Alfalfa; see Medicago sativa 
Allium canadense 
Labopidea alliit Knight, 105 
Allium cepa 
Labopidea ainsliei Knight, 105 
Labopidea alii Knight, 105 
Allium cernuum 
Labopidea ainsliei Knight, 105 
Labopidea allii Knight, 105 
Alnus incana 
{Deraeocoris alnicola Knight, 70 
Neolygus alni Knight, 157 
Alnus rugosa 
*Ceratocapsus decurvatus Knight, 116 
Ceratocapsus incisus Knight, 113 
Ceratocapsus modestus (Uhler), 111 
*Deraeocoris poecilus (McAtee), 67 
Neolygus clavigenitalis Knight, 163 
*Mirid predacious, but associated with the plant under 
which it is listed. 
+Mirid possibly or probably predacious, but associated 
with the plant under which it is listed. 
_ tMirid probably associated with the plant under which 
it is listed, but exact relationship of plant and mirid not 
demonstrated. 
dacious, at least in part, but are associated with 
definite plants; these are indicated by a dagger (fT). 
Still other species have been collected on particular 
species of plants in sufficient numbers to make it 
probable that those plants are the food plants of 
the mirids, but the exact relationship existing 
between the mirids and the plants under which 
they are listed has not been demonstrated. Such 
species are indicated by a double dagger (tf). In 
species of Miridae not indicated by asterisk or 
dagger, the host relationship of the mirid and the 
plant species under which it is listed has been 
definitely established. 
Psallus alnicola Douglas and Scott, 44 
Psallus fuscatus Knight, 44 
Alnus sp. 
{Deraeocoris borealis (Van Duzee), 71 
tDiaphnidia pellucida Uhler, 92 
{Plagiognathus similis Knight, 37 
Althaea rosea 
Melanotrichus althaeae (Hussey), 96 
Ambrosia trifida 
Lygus plagiatus Uhler, 153 
Ambrosia sp. 
Chlamydatus associatus (Uhler), 25 
Chlamydatus suavis (Reuter), 26 
Ilnacora malina (Uhler), 83 
tPlagiognathus blatchleyi Reuter, 35 
Plagiognathus nigronitens Knight, 30 
Plagtognathus politus Uhler, 29 
Reuteroscopus ornatus (Reuter), 48 
Reuteroscopus sulphureus (Reuter), 49 
Amorpha canescens 
Lopidea instabilis (Reuter), 91 
Psallus amorphae Knight, 44 
Amorpha fruticosa 
Lopidea amorphae Knight, 90 
Psallus amorphae Knight, 44 
Anthemts cotula 
Polymerus basalis (Reuter), 167 
Apium graveolens 
Lygus campestris (Linnaeus), 154 
Apple; see Pyrus malus 
Arbor vitae; see Thuja occidentalis 
Arrow-wood; see Viburnum 
Artemisia canadensis 
Lygus atritibialis Knight, 152 
Psallus bakeri (Bergroth), 45 
Artemisia sp. 
Psallus bakeri (Bergroth), 45 
Artichoke; see Helianthus tuberosus 
Arundinaria tecta 
*Phytocoris arundinicola Knight, 198 
Asclepias sp. 
tl/nacora divisa Reuter, 83 
Macrolophus brevicornis Knight, 55 
Ash; see Fraxinus 
Ash, black; see Fraxinus nigra 
Ash, red; see Fraxinus pennsylvanica 
Ash, white; see Fraxinus americana 
Aspen, American; see Populus tremuloia 
Aspidium spinulosum 
Monalocoris filicis (Linnaeus), 58 
Aster, golden; see Chrysopsis 
Aster macrophyllus 
Microphylellus nigricornis Knight, 41 
eoagey 
