Identification keys and general biology are given in Morgan (1984) and Falk (1991).
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Identification keys and general biology are given in Morgan (1984) and Falk (1991). Previously known as C. helleni Linsenmaier, 1959. Kunz (1994) considers C. bicolor Lepeletier, 1805 and C. illigeri to be the same species. Morgan (1984) separates these two names, with C. bicolor only known from Jersey.
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A small, black solitary wasp. Identification keys are given in Lomholt (1984), Richards (1980) and Yeo & Corbet (1995).
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A small, stem nesting solitary wasp. Identification keys are given in Lomholdt (1984) (as R. nigrinum), Richards (1980) and Yeo & Corbet (1995).
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Identification keys and general biology of this species, (also known as C. pallipes Lepeletier, 1805), are given in Morgan (1984) and Falk (1991).
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This is by far the more common species of Stigmus in Britain.
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A small, ground-nesting red and black solitary wasp. Identification keys are given in Richards (1980), Lomholt (1984) and Yeo & Corbet (1995).
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Gayubo & Felton (2000) provide an identification key to the six European Nitela species, as well as detailed descriptions. Felton (1987) keyed the two British species, misidentifying N. lucens as N. spinolae.
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A species closely related to Passaloecus insignis, from which it is separable only with difficulty.