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Page scan of Main Catalog Series: vol.041_205476-205500
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Page scan of Main Catalog Series: vol.046_228301-228325
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Page scan of Main Catalog Series: vol.118_590501-590525
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Page scan of Main Catalog Series: vol.041_205201-205225
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USNM 140078 Empidonax difficilis insulicola LAT
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USNM 140078 Empidonax difficilis insulicola TAG1
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USNM 140078 Empidonax difficilis insulicola DOR
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USNM 140078 Empidonax difficilis insulicola VEN
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USNM 140078 Empidonax difficilis insulicola TAG2
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Page scan of Main Catalog Series: vol.025_127851-127875
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Page scan of Main Catalog Series: vol.026_133701-133725
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Page scan of Main Catalog Series: vol.031_154551-154575
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Page scan of Main Catalog Series: vol.031_157551-157575
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Page scan of Main Catalog Series: vol.113_564501-564525
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Page scan of Main Catalog Series: vol.039_197126-197150
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Page scan of Main Catalog Series: vol.037_186576-186600
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Page scan of Main Catalog Series: vol.041_204151-204175
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USNM 154599 Empidonax difficilis occidentalis VEN
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USNM 154599 Empidonax difficilis occidentalis LAT
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Page scan of Main Catalog Series: vol.106_532851-532875
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Page scan of Main Catalog Series: vol.106_529176-529200
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Page scan of Main Catalog Series: vol.045_226376-226400
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USNM 154599 Empidonax difficilis occidentalis DOR
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Page scan of Main Catalog Series: vol.019_099101-099125