424 
Rudbeckia sp. (Coneflower) 
Macrosiphum ambrosiae 
Macrosiphum rudbeckiae 
Macrosiphum valerianae 
Rudbeckia hirta (Blackeyed 
Susan) 
Macrosiphum martini 
Rudbeckia laciniata (Cutleaf 
Coneflower) 
Macrosiphum rudbeckiae 
Rudbeckia montana 
Macrosiphum cockerelli 
Macrosiphum rudbeckiarum 
Rumex sp. (Dock) 
Aphis armoraciae 
Aphis fabae 
Aphis gossypii 
Aphis medicaginis 
Aphis rumicis 
Aphis sambuci 
Macrosiphum solanifolii 
Myzus circumflexus 
Myzus persicae 
Rumex acetosella (Sheep 
Sorrel) 
Aphis armoraciae 
Rumex crispus (Curly Dock) 
Aphis rumicis 
Rumex obtusifolius (Bitter 
Dock) 
Aphis sambuci 
Rush—see Juncus 
Russianolive—see Eleagnus 
angustifolia 
Russianthistle—see Salsola 
Rye—see Secale 
Rye, wild—see Elymus 
Sagebrush—see Artemisia 
Sagittaria sp. (Arrowhead) 
Rhopalosiphum nymphaeae 
Salix sp. (Willow) 
Aphis saliceti 
Aphis vorabonnevilla 
Brevicoryne fraterna 
Cavariella aegopodii 
Cavariella essigi 
Cavariella theobaldi 
Chaitopherus populi 
Chaitophorus viminalis 
Fullawaya saliciradicis 
Lachnus salignus 
Macrosiphum californicum 
Periphyllus macrostachyae 
Periphyllus salicicorticis 
Periphyllus saliciniger 
Periphyllus utahensis 
Pterocomma bicolor 
Pterocomma braggii 
Pterocomma flocculosa 
Pterocomma pilosa 
Pterocomma salicis 
Pterocomma smithiae 
Salix alba (White Willow) 
Lachnus salignus 
APHIDS OF THE ROCKY MOUNTAIN REGION 
Salix amygdaloides 
(Peachleaf Willow) 
Macrosiphum laevigatae 
Salix elegantissima 
(Thurlow Weeping 
Willow) 
Lachnus salignus 
Salix laevigata (Red Willow 
cr Polished Willow) 
Fullawaya saliciradicis 
Salix lutea (Yellow Willow) 
Aphis sorensoni 
Salsify, meadow—see 
Trapogon 
Salsola sp. (Russianthistle). 
Aphis medicaginis 
Asiphonaphis utahensis 
Myzus persicae 
Sambucus sp. (Elder) 
Aphis fabae 
Sambucus canadensis 
(American Elder) 
Macrosiphum macrosiphum 
Sambucus nigra (European 
Elder) 
Aphis sambuci 
Sambucus pubens (Scarlet 
Elder) 
Amphorophora stanleyi 
Aphis fabae 
Aphis sambucifoliae 
Sarcobatus vermiculatus 
(Black Grease-wood) 
Aphis bonnevillensis 
Aphis unaweepiensis 
Scirpus sp. (Bulrush) 
Rhopalosiphum nymphaeae 
Rhopalosiphum scirpifolii 
Rhopalosiphum splendens 
Saltusaphis elongata 
Saltusaphis scirpa 
Saltusaphis virginica 
Scirpus paludosus (Alkali 
Bulrush) 
Rhopalosiphum scirpifolii 
Secale cereale (Rye) 
Macrosiphum granarium 
Sedge—see Carex 
Senecio sp. (Groundsel) 
Aphis armoraciae 
Aphis helichrysi 
Aphis lugentis 
Aphis nyctalis 
Aphis senecio-radicis 
Macrosiphum solanifolii 
Senecio atratus (Black 
Groundsel) 
Aphis lugentis 
Senecio spartioides (Broom 
Groundsel) 
Aphis lugentis 
Senecio triangularis 
(Arrowleaf Groundsel) 
Aphis lugentis 
Senecio uintahensis 
Aphis nyctalis 
Macrosiphum pseudorosae 
Serviceberry—see 
Amelanchier 
Setaria sp. (Bristlegrass or 
Millet) 
Anoecia setariae 
Rhopalosiphum maidis 
Forda olivacea 
Setaria viridis (Green 
Bristlegrass) 
Rhopalosiphum maidis 
Shadbush—see Amelanchier 
Shepherdia argentea 
(Silver-berry) 
Capitophorus braggii 
Capitophorus hippophaes 
Capitophorus shepherdiae 
Shepherd’s Purse—see 
Capsella 
Sieversia ciliata 
Macrosiphum kiowanepum 
Smilacina sp. 
(Solomonplume) 
Macrosiphum nivanistum 
Macrosiphum yagasogae 
Snakeweed—see Gutierrezia 
Snapdragon—see 
Antirrhinum 
Sneezeweed—see Helenium 
Sneezewort Yarrow—see 
Achillea 
Snowball—see Viburnum 
Snowberry—see 
Symphoricarpos 
Snow-on-the-mountain—see 
Euphorbia 
Soapweed—see Yucca 
Solanum melongena (Garden 
Eggplant) 
Aphis gossypii 
Myzus persicae 
Solanum tuberosum (Potato) 
Macrosiphum solanifolii 
Myzus circumflexus 
Myzus persicae 
Myzus solani 
Solidago sp. (Goldenrod) 
Aphis medicaginis 
Aphis solidaginifoliae 
Macrosiphum ambrosiae (?) 
Macrosiphum atripes 
Pemphigus balsamiferae (?) 
Rhopalosiphum serotinae 
Solidago canadensis 
(Canada Goldenrod) 
Amphorophora goldamaryae 
Solidago missouriensis 
(Missouri Goldenrod) 
Macrosiphum atripes 
Solomonplume—see 
Smilacina 
