Lasioglossum zonulum (Smith, F.,1848)

Description and notes

Distribution

Restricted to southern England and south Wales, with a few occurrences in the Welsh borders and an old specimen is known from north Wales (Criccieth). Known from the Channel Islands (Sark, I C Beavis, pers. comm.). Abroad, an Holarctic species, probably introduced to North America. Widely distributed in the temperate and warm zones of the Palaearctic and north Oriental regions.

Status (in Britain only)

This species is not regarded as being scarce or threatened.

Habitat

The species shows a preference for woodland rides and sometimes is coastal. Not frequent on calcareous soils.

Flight period

Univoltine. The females fly from early April to October, males from June to September.

Pollen collected

This bee is widely polylectic.

Nesting biology

A solitary mining bee nesting in areas exposed to the sun. The main burrow is almost vertical down to a depth of some 20 cm, where it is widened into a blind ending. Cells are constructed, each at the end of a short lateral burrow, starting at a depth of 10 cm below the ground level. Cells are pyriform with polished walls, and are sealed after being provisioned and an egg laid. The pollen provisioned is frequently yellow. After copulation, the young females hibernate in the maternal nest, lengthening the burrow to 40-50 cm and constructing individual hibernaculae. It has been suggested that the foundress female may live up to two years (Pesenko et al. 2000).

Flowers visited

The bees visit a range of botanical families.

Parasites

The bee Sphecodes scabricollis is thought to be a cleptoparasite of L. zonulum, the two species having been dug out of the soil together (C R Vardy; specimens in the Natural History Museum, London). The species also have rather similar ranges in the UK, although S. scabricollis is much more scarce.

Author of profile

G W Allen.

Year profile last updated

2006