Chalk Yellow-face Bee - Hylaeus dilatatus

Alternative names
Hylaeus annularis

British representatives of the subgenus Lambdopsis are restricted to Hylaeus dilatatus and H. annularis (formerly H. spilotus).The females of both differ from other British Hylaeus in the reduced, circular (not wedge-shaped or linear) paraocular markings; the males have greatly dilated, yellow and black-marked, sub-rectangular antennal scapes (easily visible to the naked eye).

Identification difficulty
Recording advice

Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed.


The species is often locally common on calcareous grassland, but has been reported from coastal sites, fens and open woodland.

When to see it

Univoltine; early June to late August or early September. As with all British Hylaeus, the females are often long lived (the males having a considerably shorter adult life).

Life History

Nest burrows are made in old bramble stems and n the stems of some other plants.

UK Status

Widely distributed, though local, in southern England; the range extends north to the Midlands (Leicestershire). In Wales, only recorded from South Glamorgan.

VC55 Status

Status in Leicestershire and Rutland no known.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map