A small black solitary wasp about which very little is known. Identification keys are given in Yeo & Corbet (1995), Lomholdt (1984) and Richards (1980).

Description and notes A medium-sized red and black spider wasp. Identification may be made from Day (1988). The male has a relatively distinct genital plate, but females are very similar to others in the subgenus Ammosphex Wilcke, and considerable care is necessary in identification.

There are approximately 100 species in this genus worldwide. Lomholdt (1984) states that there are only seven species in Europe, but Bitsch et al. (2001) list ten, although one of these, P. hidalgo, was only described in 1990.Three species have been recorded in Britain.

Disagreement exists regarding the definition of this name. Kunz (1994) treats this species as a variety of C. ignita. Identification keys are given in Morgan (1984). General biology is given in Morgan (1984) and Falk (1991). Compared with other species of Chrysis, this species is usually relatively large, being 10 mm or more in body length. It can be distinguished from the other large species, C. pseudobrevitarsis, in having very large… Read more

Identification keys are given in Morgan (1984). General biology is given in Morgan (1984) and Falk (1991).

Identification keys are given in Morgan (1984). General biology is given in Morgan (1984) and Falk (1991). The latter treats this species as a variety of C. ignita. However, C. ruddii is readily recognised by the small punctures on the second gastral tergite, relative to those on the first tergum, which are of uniform size and dispersion except at the rear of the tergum.

A small, stem nesting solitary wasp. Identification keys are given in Yeo & Corbet (1995), Richards (1980) and Lomholdt (1984).

A small, black solitary wasp. Identification keys are given in Yeo & Corbet (1995), Lomholdt (1984) and Richards (1980).