INDEX 
The page entries in boldface type refer to the principal treatment of the families, genera, and 
species in the text; those in italic type refer to illustrations. Names that are synonyms, or of 
changed generic assignment, are indicated by italic type. 
A 
Acentrella, 122 
adoptiva, Leptophlebia, 92 
adoptiva, Paraleptophlebia, 88, 89, 90, 92 
aerodromia, Siphlonisca, 99, 101 
aestiva, Ephemerella, 61, 61, 64, 75 
affiliata, Hexagenia, 41 
affine, Stenonema, 167 
alamance, Neocloeon, 140, 141 
alba, Baetis, 35 
albertana, Traverella, 96, 97 
albomanicata, Chirotenetes, 113 
albrighti, Ametropus, 146 
album, Ephoron, 4, 33, 34, 34, 35 
albus, Polymitarsus, 33, 35 
allectus, Tricorythodes, 47 
alternans, Siphlurus, 106 
alternata, Baetis, 16 
alternata, Baetis, 106 
alternatus, Siphlonurus, 23, 100, 104, 105, 106, 
106 
Ameletus, 7, 8, 11, 98, 99, 100, 101 
americana, Habrophlebia, 96 
americana, Habrophlebiodes, 5, 32, 83, 96, 96 
Ametropidae, 21, 22, 26, 144, 149 
Ametropinae, 22, 144 
Ametropodidae, 21, 144 
Ametropodini, 21 
Ametropus, 144, 146 
amica, Caenis, 46, 51, 52 
ammophila, Oligoneuria, 4, 80, 30 
amplus, Baetis, 127 
anachris, Baetis, 122, 124, 125, 133 
anceps, Caenis, 46, 51, 52 
Anepeorus, 9, 151, 152, 153, 198, 199, 200 
angulata, Baetis, 39 
annulata, Baetis, 106 
annulata, Habrophlebiodes, 96 
annulatus, Siphlurus, 107 
anoka, Pseudocloeon, 139 
anomala, Oligoneuria, 24, 79 
aphrodite, Heptagenia, 181, 783, 184, 194 
areion, Stenonema, 156, 159, 163 
ares, Stenonema, 157, 159, 161, 170 
argo, Ephemerella, 56, 59, 69, 63, 63, 69 
arida, Baetis, 16, 110, 111 
arida, Baetis, 110, 111 
arida, Isonychia, 109, 710, 111 
arida, Isonychia, 110 
aridus, Chirotonetes, 110 
aridus, Siphlurus, 110 
arizonicus, Thraulodes, 94 
aroniu, Ephemerella, 69 
Arthroplea, 151, 152, 752, 153, 201 
atlantica, Cinygmula, 196, 196 
atrata, Tricorythus, 47 
atratus, Tricorythodes, 23, 44, 45, 45, 46, 47, 48 
atrescens, Ephemerella, 67 
atrocaudata, Hexagenia, 4, 38, 39, 40, 41 
attenuata, Ephemerella, 57, 59, 64, 75 
aurivillit, Chitonophora, 69 
aurivillii, Ephemerella, 58, 59, 63, 69 
aurivilliusi, Chitonophora, 69 
B 
baeticatus, Baetis, 125, 129 
Baetidae, 21, 22, 26, 27, 43, 55, 75, 81, 97, 108, 
149 
Baetidinae, 21 
Baetinae, 20, 22, 81, 98, 113 
Baetini, 20 
Baetis, 9, 10, 11, 17, 98, 113, 114, 122, 123, 128, 
135 
Baetisca, 11, 75, 77, 146 
Baetiscidae, 21, 22, 26, 75 
Baetiscinae, 21, 22, 75 
Baetiscini, 20 
Baetoidea, 21, 97 
bajkovi, Baetisca, frontis., 4,5, 76, 77, 78, 78 
basale, Siphloplecton, 24, 145, 150 
basalis, Baetis, 150 
basalis, Choroterpes, 82, 33, 94, 95 
basalis, Leptophlebia, 95 
bellum, Stenonema, 176 
berenice, Siphlonurus, 107 
betteni, Choroterpes, 96 
bicolor, Ephemerella, 60, 61, 62, 64, 72, 74 
bicolor, Isonychia, 4, 8, 109, 110, 770, 113 
bicolor, Neoephemera, 43 
bicolor, Palingenia, 113 
bilineata, Baetis, 39 
bilineata, Hexagenia, 4, 6, 8, 9, 10, 24, 27, 38, 
39, 40, 41 
bilineata, Palingenia, 16 
bipunctata, Arthroplea, 198, 201, 201 
bipunctatum, Stenonema, 5, 155, 157, 159, 160, 
161, 169, 170 
bipunctatus, Ecdyonurus, 169 
bispina, Ephemerella, 65 
bistrigatum, Centroptilum, 120 
Blasturus, 84 
Brachycercus, 44, 45, 48 
Brachyphlebia, 122 
brevicostatus, Callibaetis, 116, 118 
brunneicolor, Baetis, 100, 115, 122, 125, 134, 135 
brunneipennis, Habrophlebiodes, 96 
C 
Caenidae, 10, 21, 22, 26, 42, 43 
Caenidinae, 21 
Caeninae, 22, 43 
Caenini, 20 
Caenis, 6, 7, 8, 12, 42, 44, 44, 45, 49, 50, 51, 52 
Caenoidea, 21 
Callibaetis, 6, 8, 9, 10, 114, 115 
Campsurinae, 20, 21, 22, 28 
Campsurus, 27, 28, 30 
canadense, Stenonema, 152, 156, 159, 161, 164, 
165 
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