Bumble Bees of the Western United States - USDA Forest Service

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Measuring the Supraorbital Line in Bumble BeesSupraorbital line isdepicted by dotted yellowline. For additionalreference to cheek(malar) length and ocellisee page 12 (BumbleBee Face Diagram)ocelli at supraorbital lineocelliocelli below supraorbital lineColor Characteristics in Bumble BeesPredominantly black hairsB. pensylvanicus subsp. sonorus16 Bumble Bees of the Western United StatesBlack and yellow hairs intermixed (cloudy)B. melanopygusPredominantly yellow hairsB. huntii
Measuring the Cheek (Malar) Length in Bumble BeesFront ViewShort Cheek Medium Cheek Long CheekSide ViewLengthWidthLength shorter Length equal Length longerthan width to width than wideBumble Bees of the Western United States 17
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: Phenology MethodologyThe annual col
Page 20: Bombus nevadensis continued20 Bumbl
Page 23 and 24: Bombus balteatus continuedLateral i
Page 26 and 27: Bombus caliginosusObscure bumble be
Page 28 and 29: Bombus caliginosus continued28 Bumb
Page 30 and 31: Bombus vandykeivan Dyke bumble bee
Page 32 and 33: Bombus vandykei continued32 Bumble
Page 34 and 35: Bombus centralisCentral bumble bee
Page 36 and 37: Bombus centralis continued36 Bumble
Page 38 and 39: Bombus sitkensisSitka bumble bee•
Page 40 and 41: Bombus sitkensis continued40 Bumble
Page 42 and 43: Bombus flavifronsYellow head bumble
Page 44 and 45: Bombus flavifrons continued44 Bumbl
Page 46 and 47: Bombus frigidusFrigid bumble bee•
Page 48 and 49: Bombus frigidus continued48 Bumble
Page 50: Bombus vagansHalf-black bumble bee
Page 53 and 54: Bombus vagans continuedFemales (que
Page 55 and 56: Bombus ternarius continuedLateral i
Page 57 and 58: Bombus ternarius continuedFemales (
Page 59 and 60: Bombus mixtus continuedLateral imag
Page 62 and 63: Bombus melanopygusBlack tail bumble
Page 64: Bombus melanopygus continued64 Bumb
Page 69 and 70:
Bombus huntii continuedFemales (que
Page 71 and 72:
Bombus sylvicola continuedLateral i
Page 73 and 74:
Bombus sylvicola continuedFemales (
Page 75 and 76:
Bombus vosnesenskii continuedLatera
Page 77 and 78:
Bombus vosnesenskii continuedFemale
Page 79 and 80:
Bombus bifarius continuedLateral im
Page 81 and 82:
Bombus bifarius continuedFemales (q
Page 83 and 84:
Short-cheeked bees with arounded an
Page 85 and 86:
Bombus crotchii continuedFemales (q
Page 87 and 88:
Bombus rufocinctus continuedLateral
Page 89 and 90:
Bombus rufocinctus continuedFemales
Page 91:
Bombus griseocollis continuedLatera
Page 94 and 95:
Bombus morrisoniMorrison bumble bee
Page 97 and 98:
Bombus morrisoni continuedFemales (
Page 99 and 100:
Bombus franklini continuedLateral i
Page 101 and 102:
Bombus franklini continuedFemales (
Page 103 and 104:
Bombus occidentalis continuedLatera
Page 105 and 106:
Bombus occidentalis continuedFemale
Page 107 and 108:
Bombus terricola continuedLateral i
Page 109 and 110:
Bombus terricola continuedFemales (
Page 111 and 112:
Long-cheeked bees with asharp angle
Page 113 and 114:
Bombus appositus continuedFemales (
Page 115 and 116:
Bombus californicus continuedLatera
Page 117 and 118:
Bombus californicus continuedFemale
Page 119 and 120:
Bombus fervidus continuedLateral im
Page 121 and 122:
Bombus fervidus continuedFemales (q
Page 123 and 124:
Bombus pensylvanicus subsp. sonorus
Page 125 and 126:
Bombus pensylvanicus subsp. sonorus
Page 127 and 128:
Bees with hind leg outer tibial sur
Page 129 and 130:
Bombus insularis continuedFemales (
Page 131 and 132:
Bombus fernaldae continuedLateral i
Page 133 and 134:
Bombus fernaldae continuedFemales (
Page 135 and 136:
Bombus suckleyi continuedLateral im
Page 137 and 138:
Bombus suckleyi continuedFemales (n
Page 139 and 140:
- Cheek length equal to width; face
Page 141 and 142:
- Face with black hairs, sometimes
Page 143 and 144:
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