- Page 3 and 4: Table of Contents3 Table of Content
- Page 7 and 8: Color plates of male bumble bees ar
- Page 9 and 10: Life CycleBumble bees are considere
- Page 11 and 12: Bumble Bee Hind Leg Diagramcoxafemu
- Page 13 and 14: Map MethodologyThe maps produced fo
- Page 15 and 16: Phenology MethodologyThe annual col
- Page 17 and 18: Measuring the Cheek (Malar) Length
- Page 22 and 23: Bombus balteatusHigh country bumble
- Page 24: Bombus balteatus continued24 Bumble
- Page 27 and 28: Bombus caliginosus continuedLateral
- Page 29 and 30: Bombus caliginosus continuedFemales
- Page 31 and 32: Bombus vandykei continuedLateral im
- Page 33 and 34: Bombus vandykei continuedFemales (q
- Page 35 and 36: Bombus centralis continuedLateral i
- Page 37 and 38: Bombus centralis continuedFemales (
- Page 39 and 40: Bombus sitkensis continuedLateral i
- Page 41 and 42: Bombus sitkensis continuedFemales (
- Page 43 and 44: Bombus flavifrons continuedLateral
- Page 45 and 46: Bombus flavifrons continuedFemales
- Page 47 and 48: Bombus frigidus continuedLateral im
- Page 49 and 50: Bombus frigidus continuedFemales (q
- Page 52 and 53: Bombus vagans continued52 Bumble Be
- Page 54 and 55: Bombus ternariusTri-colored bumble
- Page 56 and 57: Bombus ternarius continued56 Bumble
- Page 58 and 59: Bombus mixtusFuzzy-horned bumble be
- Page 60: Bombus mixtus continued60 Bumble Be
- Page 63 and 64: Bombus melanopygus continuedLateral
- Page 68 and 69: Bombus huntii continued68 Bumble Be
- Page 70 and 71:
Bombus sylvicolaForest bumble bee
- Page 72 and 73:
Bombus sylvicola continued72 Bumble
- Page 74 and 75:
Bombus vosnesenskiiVosnesensky bumb
- Page 76 and 77:
Bombus vosnesenskii continued76 Bum
- Page 78 and 79:
Bombus bifariusTwo form bumble bee
- Page 80 and 81:
Bombus bifarius continued80 Bumble
- Page 82 and 83:
Bombus crotchiiCrotch bumble bee•
- Page 84 and 85:
Bombus crotchii continued84 Bumble
- Page 86 and 87:
Bombus rufocinctusRed-belted bumble
- Page 88 and 89:
Bombus rufocinctus continued88 Bumb
- Page 90 and 91:
Bombus griseocollisBrown-belted bum
- Page 93 and 94:
Bombus griseocollis continuedFemale
- Page 95:
Bombus morrisoni continuedLateral i
- Page 98 and 99:
Bombus frankliniFranklin bumble bee
- Page 100 and 101:
Bombus franklini continued100 Bumbl
- Page 102 and 103:
Bombus occidentalisWestern bumble b
- Page 104 and 105:
Bombus occidentalis continued104 Bu
- Page 106 and 107:
Bombus terricolaYellow-banded bumbl
- Page 108 and 109:
Bombus terricola continued108 Bumbl
- Page 110 and 111:
Bombus appositusWhite-shouldered bu
- Page 112 and 113:
Bombus appositus continued112 Bumbl
- Page 114 and 115:
Bombus californicusCalifornia bumbl
- Page 116 and 117:
Bombus californicus continued116 Bu
- Page 118 and 119:
Bombus fervidusYellow bumble bee•
- Page 120 and 121:
Bombus fervidus continued120 Bumble
- Page 122 and 123:
Bombus pensylvanicus subsp. sonorus
- Page 124 and 125:
Bombus pensylvanicus subsp. sonorus
- Page 126 and 127:
Bombus insularisIndiscriminate cuck
- Page 128 and 129:
Bombus insularis continued128 Bumbl
- Page 130 and 131:
Bombus fernaldaeFernald cuckoo bumb
- Page 132 and 133:
Bombus fernaldae continued132 Bumbl
- Page 134 and 135:
Bombus suckleyiSuckley cuckoo bumbl
- Page 136 and 137:
Bombus suckleyi continued136 Bumble
- Page 138 and 139:
Identification Keyfor the female bu
- Page 140 and 141:
17(10). T5-6 with orange or pale or
- Page 142 and 143:
AcknowledgementsSpecial thanks to D
- Page 144:
The U.S. Department of Agriculture