————S 
SS 
May, 1953 
purpurea, Neoephemera, 23, 24, 43, 43, 44 
pygmaea, Cloe, 128 
pygmaeus, Baetis, 4+, 722, 125, 126, 128 
Q 
quadripunctata, Pentagenia, 15 
quadripunctata, Pentagenia, 37 
quaesitum, Centroptilum, 120 
quebecensis, Cloe, 58, 59 
quebecensis, Heptagenia, 180 
quebecensis, Siphlonurus, 24, 99, 104, 105, 107 
quebecensis, Siphlurus, 107 
R 
rapidus, Siphlonurus, 104, 105 
recurvata, Hexagenia, 38, 40, 42 
Remipalpus, 201 
Rhithrogena, 149, 151, 152, 753, 154, 180, 196, 
197, 197 
ridens, Caenis, 5, 46, 51, 52 
rigida, Hexagenia, 4, 9, 38, 39, 40, 41, 41 
rivulicolus, Ecdyonurus, 172 
robusta, Pentagenia, 37, 38 
rogersi, Baetisca, 77 
rosacea, Hexagenia, 41 
rotunda, Ephemerella, 60, 67, 63, 64, 71 
ruber, Ecdyonurus, 178 
rubescens, Baetisca, 77 
rubescens, Cloe, 77 
rubrolaterale, Pseudocloeon, 139 
rubromaculata, Heptagenia, 178 
rubromaculatum, Stenonema, 158, 160, 161, 177, 
178 
rubropicta, Cloeon, 143 
rubropictum, Cloeon, 5, 141, 143 
rubrum, Stenonema, 160, 161, 162, 178 
rufa, Isonychia, 4, 24, 99, 110, 110, 112 
rufostrigatum, Centroptilum, 4, 120, 727 
rusticalis, Heptagenia, 181, 782, 188 
rusticans, Baetis, 722, 125, 126, 133, 134 
Ss 
saskatchewanensis, Lachlania, 24, 79, 81 
sayi, Isonychia, 109, 110, 710, 111 
semicostatus, Callibaetis, 118 
semiflava, Ephemerella, 70 
separata, Leptophlebia, 90 
septentrionalis, Ephemerella, 58, 59, 63, 69 
serrata, Ephemerella, 58, 59, 62, 65, 67 
serratoides, Ephemerella, 57, 59, 62, 67 
shepherdi, Ameletus, 102 
sicca, Baetis, 15 
sicca, Baetis, 112 
sicca, Isonychia, 4, 23, 109, 110, 770, 112, 112 
simplex, Anepeorus, 184, 798, 200 
simplex, Cloeon, 5, 141, 144 
simplex, Ephemerella, 4, 61, 61, 63, 64, 73 
simplex, Heptagenia, 15 
simplex, Heptagenia, 200 
simulans, Caenis, 5, 6, 7, 23, 46, 50, 50, 51, 52 
simulans, Ephemera, 4, 6, 9, 23, 25, 27, 34, 36, 
37 
Siphlonisca, 98, 99 
Siphlonuridae, 21, 97, 98 
Siphlonurinae, 22, 98, 109 
Siphlonuroidea, 21 
Burks: THe MAyr ties oF ILLINOIS 
215 
Siphlonuroides, 103 
Siphlonurus, 7, 8, 10, 98, 99, 103, 104, 108, 148 
Siphloplecton, 144, 146, 150 
Siphloplectonidae, 144 
Siphlurella, 103 
Siphlurinae, 21 
Siphlurini, 20, 21 
Siphlurus, 103, 180 
skokianus, Callibaetis, 5, 700, 115, 116, 118, 119 
sordida, Ephemerella, 57, 59, 62, 66 
Sparrea, 103 
speciosus, Thraulodes, 82, 94 
spinosus, Baetis, 4, 5, 123, 124, 126 
Stenonema, 4, 6, 7, 8, 10, 17, 153, 154, 155, 176 
sticta, Paraleptophlebia, 88, 89, 92 
strigula, Leptophlebia, 93 
strigula, Paraleptophlebia, 89, 90, 93 
stygiatus, Tricorythodes, 46, 47 
subvaria, Ephemerella, 59, 60, 63, 64, 71 
ol 
temporalis, Ephemerella, 6, 60, 61, 62, 63, 64, 
terminata, Palingenia, 15 
terminata, Palingenia, 175 
terminatum, Stenonema, 158, 160, 175 
tesselata, Baetis, 172 
thomsenae, Baetisca, 77 
Thraulodes, 84, 93 
Timpanoga, 56 
Torleya, 56 
Tortopus, 7, 27, 28, 30 
Traverella, 84, 97 
triangularis, Siphlurus, 107 
Tricorythodes, 5, 44, 45 
Tricorythus, 45 
tripunctata, Heptagenia, 168 
tripunctatum, Stenonema, 5, 6, 155, 157, 159, 
160, 161, 162, 168, 168, 169 
tripunctatum, Stenonema femoratum, 168 
tuberculata, Ephemerella, 57, 59, 62, 65 
typicus, Siphlonurus, 104, 705, 107 
typicus, Siphlurus, 107 
U 
ulmeri, Behningia, 200 
umbratica, Heptagenia, 181, 782, 184, 190 
unicolor, Cloe, 16 
unicolor, Cloe, 77 
unicornis, Ephemerella, 73 
is 
vagans, Baetis, 5, 6, 101, 115, 122, 124, 125, 126, 
PSL 32 
varia, Ephemera, 34, 36, 37 
variabilis, Hexagenia, 39 
venusta, Hexagenia, 39 
verisimilis, Ephemerella, 61, 67, 64, 74 
verticis, Baetis, 31 
verticis, Potamanthus, 4, 25, 31, 37, 32 
veteris, Pseudocloeon, 4, 137, 140 
vibrans, Habrophlebia, 82, 83, 94, 94 
vicaria, Baetis, 172 
vicarium, Stenonema, 157, 160, 161, 171, 172 
vicina, Cloe, 126, 144 
vicinum, Cloeon, 141, 144 
