414 
Drepanosiphum platanoides 
Periphyllus americanus 
Acer saccharinum (Silver 
Maple) 
Drepanaphis acerifolii 
Periphyllus americanus 
Acer saccharum (Sugar 
Maple) 
Periphyllus americanus 
Periphyllus lyropictus 
Achillea sp. (Yarrow) 
Pemphigus balsamiferae 
Achillea millefolium 
(Common Yarrow) 
Aphis helichrysi 
Aphis knowltoni 
Achillea ptarmica 
(Sneezewort Yarrow) 
Microsiphum ptarmicae 
Aconitum columbianum 
(Columbia Monkshood) 
Kakimia wahinkae 
Actinea sp. 
Macrosiphum euphorbiae 
Agrimonia eupatoria 
(Common Agrimony) 
Macrosiphum agrimoniellum 
Agrimonia striata 
(Roadside Agrimony) 
Macrosiphum solanfolii 
Macrosiphum pseudorosae 
Agrimony—see Agrimonia 
Agropyron sp. (Wheat 
Grass) 
Brachycolus tritici 
Forda olivacea 
Sipha agropyronensis 
Colopha ulmisacculi 
- Toxoptera graminum 
Alder—see Alnus 
Alfalfa—see Medicago 
Alfilaria—see Erodium 
Alnus sp.—Alder 
Euceraphis gillettei 
Oestlundiella flava 
Alnus rhombifolia (Sierra 
Alder) 
Oestlundiella flava 
Alnus tenuifolia (Thinleaf 
Alder) 
Euceraphis gillettei 
Oestlundiella flava 
Alopecurus sp. (Foxtail) 
Forda olivacea 
Althea rosea (Hollyhock) 
Macrosiphum eoessigi 
Myzus persicae 
Amaranth, Globe—see 
Gomphrena 
Amaranthus sp. (Amaranth) 
Aphis gossypii 
Aphis medicaginis 
Macrosiphum solanifolii 
Myzus persicae 
APHIDS OF THE ROCKY MOUNTAIN REGION 
Amaranthus retroflexus 
,. (Redroot Amaranth) 
Aphis fabae 
Aphis helianthi 
Ambrosia artemisifolia 
(Common Ragweed) 
Aphis helianthi 
Aphis helichryst 
Capitophorus wasatchii 
Ambrosia trifida (Giant 
Ragweed) 
Aphis armoraciae 
Aphis helianthi 
Macrosiphum ambrosiae 
Amelanchier sp. 
(Serviceberry) 
Aphis sensoriata 
Amelanchier alnifolia 
(Common Shad, June- 
berry, Saskatoon, Service- 
berry) 
Eriosoma americanum 
Macrosiphum macrosiphum 
Prociphilus corrugatans 
Anaphalis margaritacea 
(Common Pearleverlast- 
ing) 
Macrosiphum idahoensis 
Anethum graveolens (Dill) 
Cavariella aegopodii 
Rhopalosiphum conii 
Antelope brush—see Purshia 
Antirrhinum sp. 
(Snapdragon) 
Myzus persicae 
Apium graveolens (Garden 
Celery) 
Amphorophora sonchi 
Aphis crypta 
Aphis gossypii 
Aphis helichrysi 
Aphis heraclella 
Cavariella aegopodii 
Cavariella theobaldi 
Macrosiphum dirhodum 
Myzus circumflexus 
Myzus persicae 
Rhopalosiphum conii 
Apocynum sp. (Dogbane) 
Macrosiphum solanifolii 
Apple—see Malus sp. 
Apricot—see Prunus 
armeniaca 
Aquilegia sp. (Columbine) 
Myzus circumflexus 
Aquilegia coerulea 
(Colorado Columbine) 
Kakimia essigi 
Macrosiphum solanifolii 
Aquilegia rubicunda (Pink 
Columbine) 
Kakimia essigi 
Kakimia utahensis 
Aragallus—see Oxytropis 
Arbor-vitae—see Thuja 
Arctium sp. (Burdock) 
Aphis fabae 
Arctostaphylos uva-ursi 
(Bearberry) 
Amphorophora nervata 
Tamalia coweni 
Armoracia lapathifolia 
(Horseradish) 
Aphis armoraciae 
Macrosiphum solanifolit 
Myzus persicae 
Arnica sp. (Arnica) 
Amphorophora arnicae 
Arrowhead—see 
Sagittaria 
Artemisia sp. (Wormwood 
or Sagebrush) 
Capitophorus pycnorhysus 
Geoica utricularia 
Macrosiphum flavila 
Prociphilus erigeronensis 
Artemisia aromatica (Linear- 
leaved wormwood) 
Aphis maidi-radicis 
Aphis menthae-radicis 
Artemisaphis artemisicola 
Capitophorus wasatchii 
Macrosiphum artemisivulgaris 
Macrosiphum glabrum 
Macrosiphum artemisiae 
Artemisia borealis 
(Northern wormwood) 
Macrosiphum frigidae 
Artemisia cana (Silver 
Sagebrush) 
Aphis canae 
Artemisaphis artemisicola 
Macrosiphum jonesii 
Artemisia filifolia (Sand 
Sagebrush) 
Aphis canae 
Aphis filifoliae 
Aphis hermistonii 
Aphis minutissima 
Capitophorus filifoliae 
Epameibaphis utahensis 
Macrosiphum filifoliae 
Macrosiphum jonesii 
Artemisia frigida (Fringed 
Sagebrush) 
Aphis armoraciae 
Aphis maidi-radicis 
Capitophorus 
pseudoglandulosus 
Epameibaphis frigidae 
Macrosiphum frigidae 
Macrosiphum frigidicola 
Pseudoepameibaphis glauca 
Artemisia longifolia 
(Longleaf Sagebrush) 
Aphis canae 
Artemisaphis artemisicola 
Capitophorus brevinectarius 
