Scilly Isles

I am so excited to say we have a two week holiday booked for the Scilly Isles spending a few days on each island, its a place we have wanted to go for years.

So looking forward to see what insects I can find.


Lasioglossum morio – Lode

Lasioglossum morio

The commonest of our four small, metallic-green/torquiose Lasioglossum species. Both sexes are most easily distinguished from the others by the densely punctate, dull scutum which has obvious microsculpture between the punctures. Some females of L.leucopus can difficult to separate, but morio has a duller thorax, duller hind margins to the upper part of the propodeum, and minute transverse ridges on the apical depression of tergite 2.

This is a widespread and often abundant species found in a wide range of habitats, where it exploits various flowers. It can sometimes be found nesting in the soft mortar walls.
It is a host of the cleptoparastic bee Sphecodes niger and possibly S. geoffrellus and Nomada sheppardana; also the conopid fly Thecophora atra.

Lasioglossum pauxillum-Lode

(not my photo the bee is so small and flighty I failed to get a photo a specimen was caught and keyed)


Historically this was a scarce species of southern England but it has shown a substantial increase in the 21st century, expanding its range over much of central England. It occurs in a wide range of dry habitats but perhaps especially calcareous grasslands and brownfield sites. Various flowers and spring blossoms are visited. A possible host of Sphecodes crassus and S. ferruginatus.

Lasioglossum malachurum

Specimen taken and keyed

Lasioglossum malachurum

Southern England and the Channel Islands. Formerly a scarce and very local species but, since about 1990, it has been extending its range in England and is common to locally abundant in many sites in the southern counties. Widely distributed in the western Palaearctic, its range extending from Denmark to the Azores and North Africa (Morocco), eastwards throughout central and southern Europe to Iran.
Status (in Britain only)
This species is not regarded as being scarce or threatened.
Coastal cliffs and landslips, abandoned quarries, commons, chalk grassland and private gardens.
Flight period
Females from early April to October; males from early July to the beginning of October. G M Spooner (pers. comm.) found several active gynes on the Dorset coast in mid-February.
Nesting biology
Commonly nests in aggregations, occasionally of considerable extent, especially in exposed soil at the base of coastal cliffs and similar unstable locations where vegetation is sparse. Nest burrows are often observed in the hard trodden soil of footpaths. Sites at the top of beaches are sometimes deluged by sea water during winter storms. A well known eusocial species, its development being one of the most extensively documented of any Palaearctic halictine species. Important references include Stoeckhert (1923), Legewie (1925), Noll (1931), Bonelli (1948), Michener (1974) and Westrich (1989). The worker is smaller than the gyne and was originally described as a distinct species, Halictus longulus Smith, 1848.
Flowers visited
Includes cinquefoil (Potentilla spp.), colt’s-foot (Tussilago farfara), common fleabane (Pulicaria dysenterica), creeping thistle (Cirsium arvense), dandelion (Taraxacum officinale), fennel (Foeniculum vulgare), field bindweed (Convolvulus arvensis), hawkweed (Hieraceum spp.), mayweed (Tripleurospermum spp.), oxtongue (Picris echioides), stonecrop (Sedum spp.) and wild parsnip (Pastinacea sativa).
L Packer (pers. comm.) has excavated the cleptoparasite, Sphecodes monilicornis (Kirby) and larvae of the oil beetle Meloe proscarabaeus Linnaeus from nest burrows of this bee on the Isle of Wight.