[Illustration: Plate IX. E. W. Robinson, Delineavit et Sculpsit 1866.]
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1 ♂. Nomada Jacobææ, _male_. 1 ♀. " " _female_. 2 ♂. Nomada Solidaginis, _male_. 2 ♂* (should be ♀). " _female_. 3 ♂. Nomada lateralis, _male_. 3 ♀. " " _female_.
[Illustration: Plate X. E. W. Robinson, Delineavit et Sculpsit 1866.]
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1 ♂. Melecta punctata, _male_. 1 ♀. " " _female_. 2 ♂. Epeolus variegatus, _male_. 2 ♀. " " _female_. 3 ♂. Stelis phæoptera, _male_. 3 ♀. " " _female_.
[Illustration: Plate XI. E. W. Robinson, Delineavit et Sculpsit 1866.]
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1 ♂. Cœlioxys Vectis, _male_. 1 ♀. " " _female_. 2 ♂. Megachile maritima, _male_. 2 ♀. " " _female_. 3 ♂. Megachile argentata, _male_. 3 ♀. " " _female_.
[Illustration: Plate XII. E. W. Robinson, Delineavit et Sculpsit 1866.]
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1 ♂. Anthidium manicatum, _male_. 1 ♀. " " _female_. 2 ♂. Chelostoma florisomne, _male_. 2 ♀. " " _female_. 3 ♂. Heriades truncorum, _male_. 3 ♀. " " _female_.
[Illustration: Plate XIII. E. W. Robinson, Delineavit et Sculpsit 1866.]
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1 ♂. Osmia bicolor, _male_. 1 ♀. " " _female_. 2 ♂. Anthocopa Papaveris, _male_. 2 ♀. " " _female_. 3 ♂. Osmia leucomelana, _male_. 3 ♀. " " _female_.
[Illustration: Plate XIV. E. W. Robinson, Delineavit et Sculpsit 1866.]
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1 ♂. Apathus rupestris, _male_. 1 ♀. " " _female_. 2 ♂ (should be ♀). Apathus campestris, _female_. 2 ♀. Apathus vestalis, _female_. 3 ♀. Bombus fragrans, _female_. 4 ♂. " Soroensis (var. Burrellanus), _male_.
[Illustration: Plate XV. E. W. Robinson, Delineavit et Sculpsit 1866.]
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1 ♀. Bombus Harrisellus, _female_. 2 ♀. " Lapponicus, _female_. 3 ♀. " sylvarum, _female_. 4 ♂. Apis mellifica, _male_. 4 ♀. " " _female_. 4 ⚲. " " _neuter_.
[Illustration: Plate XVI. E. W. Robinson, Delineavit et Sculpsit 1866.]