May, 1953 
guttata, Leptophlebia, 93 
guttata, Paraleptophlebia, 59, 90, 93 
guttulata, Ephemera, 36 
H 
Habrophlebia, 84, 94 
Habrophlebiodes, 84, 95, 96 
Haplonia, 201 
harti, Baetis, 4, 722, 125, 128 
hebe, Heptagenia, 181, 783, 184, 191 
hebes, Ephemera, 86 
Heptagenia, 4, 6, 8, 10, 17, 23, 58, 153, 154, 155, 
180 
Heptageniidae, 21, 22, 26, 55, 98, 108, 144, 149, 
151, 176 
Heptageninae, 20, 21 
Heptagenioidea, 21, 75, 97, 108 
herodes, Baetis, 6, 122, 125, 126, 130 
Heterocloeon, 114, 121 
heterotarsale, Stenonema, 757, 159, 161, 163, 
164, 167 
heterotarsale, Stenonema inter punctatum, 167 
heterotarsalis, Ecdyonurus, 167 
Hexagenia, 6, 7, 8, 9, 35, 37, 38, 42, 108 
hilaris, Caenis, 5, 46, 51, 53 
hilaris, Ephemera, 53 
idei, Brachicercus, 49 
ignava, Baetis, 86 
incertans, Baetis, 125, 132 
incertus, Campsurus, 28 
inconspicua, Heptagenia, 181, 782, 188 
inflata, Ephemerella, 64 
ingens, Cloeon, 141, 142 
insignificans, Cloeon, 141, 143 
integer, Heptagenia (Ecdyonurus ?), 176 
integrum, Cinygma, 152, 154, 196, 196 
integrum, Stenonema, 5, 155, 158, 160, 174, 176, 
200 
intercalaris, Baetis, 4, 8, 775, 122, 123, 124, 125, 
126.132,, 133, 135 
interlineata, Baetis, 15 
interlineata, Baetis, 150 
interlineatum, Siphloplecton, frontis., 4, 23, 145, 
150 
interpunctata, Baetis, 166 
interpunctata, Palingenia, 16, 164, 165 
interpunctatum, Stenonema, 155, 156, 159, 160, 
161, 162, 163, 164, 166 
interpunctatum, Stenonema inter punctatum, 166 
imvaria, Baetis, 71 
invaria, Ephemerella, 4, 58, 60, 63, 67, 71, 72 
Iron, 176, 194 
Ironodes, 194 
Ironopsis, 194 
Isonychia, 7, 9, 11, 98, 700, 108, 109 
Isonychiinae, 22, 98, 108 
ithaca, Heptagenia, 173 
ithaca, Stenonema, 158, 160, 161, 173 
J 
jejuna, Rhithrogena, 149 
jocosa, Caenis, 46, 51, 54 
jocosa, Habrophlebia, 94 
johnsoni, Leptophlebia, 85 
Burks: THE MAyr ties oF ILLINOIS 
213 
Jolia, 109 
juno, Heptagenia, 181, 183, 183, 193 
K 
kanuga, Hexagenia, 41 
1G; 
Lachlania, 81 
lacustris, Baetisca, 76, 77, 78, 79 
lacustris, Brachycercus, 23, 44, 46, 48, 49, 
50 
lacustris, Caenis, 49 
laevitans, Baetis, 133 
lasallei, Baetis, 135 
lata, Ephemerella, 57, 59, 62, 62, 64 
latipennis, Caenis, 46, 54 
laurentina, Baetisca, 4, 5, 76, 77 
Leptohyphes, 43, 44, 45, 55 
lepton, Stenonema, frontis., 158, 160, 176 
Leptophlebia, 8, 10, 81, 83, 84, 85, 87, 103 
Leptophlebiidae, 13, 21, 22, 26, 27, 81 
Leptophlebiinae, 21, 22, 81 
Leptophlebiini, 21 
Leptophlebini, 20 
leukon, Ephoron, 4, 23, 25, 29, 33, 33, 34, 35 
levitans, Baetis, 722, 125, 126, 133 
limbata, Ephemera, 39 
limbata, Hexagenia, 3, 4, 4, 6, 8, 9, 29, 38, 39, 
40, 41, 41 
limbata, Palingenia, 16 
lineata, Ephemerella, 72 
lineatus, Ameletus, 4, 6, 9, 2%, 100, 101, 102, 102, 
103 
lita, Ephemerella, 63, 64, 74 
lucidipennis, Ecdyurus, 189 
lucidipennis, Heptagenia, 180, 181, 732, 183, 188, 
189 
ludens, Ameletus, 8, 9, 101, 102, 702, 103, 103 
lutea, Heptagenia, 175 
luteum, Stenonema, 158, 160, 161, 175 
lutulenta, Ephemerella, 6, 24, 56, 60, 61, 63, 64, 
72, 73 
M 
maculipennis, Heptagenia, 15, 152, 153, 181, 183, 
184, 190, 192 
majus, Stenonema, 165 
manifesta, Heptagenia, 180 
manifesta, Rhithrogena, 180 
manitobensis, Campsurus, 28 
marginalis, Heptagenia, 181, 782, 183, 186 
marilandica, Hexagenia, 41 
marshalli, Siphlonurus, 5, 7, 70, 100, 101, 104, 
105, 107 
maxima, Caenis, 42 
mediopunctatum, Stenonema, 160, 174 
medio punctatus, Ecdyonurus, 174 
medius, Potamanthus, 31 
mendax, Cloe, 15 
mendax, Cloe, 143 
mendax, Cloeon, 5, 1/40, 141, 143 
Metretopinae, 22, 144 
Metretopodidae, 144 
Metretopus, 144, 146, 148 
Metreturus, 144, 146 
metriotes, Stenonema, 158, 160, 174 
