''Lasius'' is a genus of

formicine The Formicinae are a subfamily within the Formicidae containing ants of moderate evolutionary development. Formicines retain some primitive features, such as the presence of cocoons around pupae, the presence of ocelli in workers, and little ...

ants. The type species for this genus is the black garden ant, ''

Lasius niger ) , official_languages = , languages_type = National languagesheathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species include the temporary social parasites of the ''L. mixtus'' group and the hyper-social parasite ''

Lasius fuliginosus ''Lasius fuliginosus'', also known as the jet ant or jet black ant, is a species of ant in the subfamily Formicinae. Distribution This species has a wide distribution in Europe and Asia, from Portugal and Ireland in the west, Finland in the nort ...

''. ''

Lasius flavus The yellow meadow ant (''Lasius flavus''), also known as the yellow hill ant, is a species of ant occurring in Europe (where it is one of the most common ants), Asia, and North Africa. Populations in North America are now considered a different, ...

'' is also a commonly seen species, building grassy hillocks in undisturbed pasture. In the Alps, these mounds - always aligned east to catch the first rays of the rising sun - have been traditionally used by goatherds as natural compasses. Species in the subgenus ''Acanthomyops'', in particular '' L. interjectus'' and '' L. claviger'', are commonly known as citronella ants due to their citronella-like smell.

Moisture ants

Many ''Lasius'' species, known collectively as "moisture ants" in the United States, make their nests in and around moist rotting wood as well as under rocks. They can infest buildings, particularly foundation forms in contact with soil, becoming a minor nuisance. They are not considered a structural threat because they only make their galleries in wood that is already decayed. Some species build "cartonlike" nests in moist locations made of decayed wood fragments cemented together with honeydew and the ant's mandibular gland secretions. Workers are monomorphic, 2 to 3 mm long, yellow to dark brown. They are secretive, and forage mostly at night for honeydew and other sweet substances, and may also prey on small insects. Winged reproductive males and females swarm in late summer and fall, which is when building infestations may be noticed. They are distinguished from carpenter ants (''Camponotus''), another structure-infesting species, by being much smaller, and having a notch in the dorsal thorax (top of the center body division), where carpenter ants have a rounded thorax. Widespread moisture ant species include ''L. alienus'' and ''L. neoniger'', as well as some ''Acanthomyops'' species.

Species

*''

Lasius alienoflavus ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species i ...

'' Bingham, 1903 *''

Lasius alienus ''Lasius alienus'', or cornfield ant, is a species of ant in the subfamily Formicinae (family Formicidae). Workers have a length of about 2–4 mm, Queens are larger (7–9 mm). Distribution They live in Europe, from Spain to the Cauca ...

'' (Foerster, 1850) *''

Lasius americanus ''Lasius alienus'', or cornfield ant, is a species of ant in the subfamily Formicinae (family Formicidae). Workers have a length of about 2–4 mm, Queens are larger (7–9 mm). Distribution They live in Europe, from Spain to the Cauca ...

'' Emery 1893 *†''

Lasius anthracinus ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species i ...

'' (Heer, 1867) *''

Lasius aphidicola ''Lasius umbratus'', colloquially known as the yellow shadow ant and yellow lawn ant, is a palearctic species of parasitic ant distributed across Eurasia and the Maghreb region of Africa. It was once thought that this species occurred in North ...

'' (Walsh, 1863) *''

Lasius arizonicus ''Lasius arizonicus'' is a species of ant belonging to the genus ''Lasius'', formerly a part of the genus (now a subgenus) ''Acanthomyops''. Described in 1917 by Wheeler, the species is native to the United States The United States of A ...

'' Wheeler, 1917 *''

Lasius atopus ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species i ...

'' Cole, 1958 *''

Lasius austriacus ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species i ...

'' Schlick-Steiner, Steiner, Schödl & Seifert, 2003 *''

Lasius balcanicus ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species i ...

'' Seifert, 1988 *''

Lasius balearicus ''Lasius balearicus'' is an ant species from the genus ''Lasius''. It was discovered in 1982 by Cedric Alex Collingwood, an entomologist from the Royal Entomological Society and described as a new species in 2014 after a team from the Institut d ...

'' Talavera, Espadaler & Vila, 2014 *''

Lasius bicornis ''Lasius bicornis'' is a species of ant Ants are eusocial insects of the family Formicidae and, along with the related wasps and bees, belong to the order Hymenoptera. Ants evolved from vespoid wasp ancestors in the Cretaceous period ...

'' (Foerster, 1850) *''

Lasius bombycina ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species i ...

'' Seifert & Galkowski, 2016 *''

Lasius brevicornis The yellow meadow ant (''Lasius flavus''), also known as the yellow hill ant, is a species of ant occurring in Europe (where it is one of the most common ants), Asia, and North Africa. Populations in North America are now considered a different, ...

'' Emery 1893 *''

Lasius brevipalpus ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species in ...

'' Seifert, 2020 *''

Lasius brunneus ''Lasius brunneus'' is a species of ant in the genus ''Lasius''. The species is widely distributed in Europe, from Sweden in the north to Anatolia in the south. In England this species is almost always found nesting in oak trees or rotting wood m ...

'' (Latreille, 1798) *''

Lasius buccatus ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species i ...

'' Stärcke, 1942 *''

Lasius bureni ''Lasius bureni'' is a species of ant belonging to the genus '' Lasius'', formerly a part of the subgenus'' Acanthomyops''. Described in 1968 by Wing, the species is native to the United States The United States of America (U.S.A. or ...

'' (Wing, 1968) *''

Lasius californicus ''Lasius californicus'' is a species of ant belonging to the genus '' Lasius'', and was formerly a part of the genus '' Acanthomyops'' (now a subgenus). Described in 1917 by Wheeler, the species is native to the United States The Unite ...

'' Wheeler, 1917 *''

Lasius capitatus ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species i ...

'' (Kuznetsov-Ugamsky, 1927) *''

Lasius carniolicus ''Lasius carniolicus'' is a species of ant belonging to the family Formicidae. It is native to Europe. References {{Taxonbar, from=Q4042622 carniolicus Insects described in 1861 ...

'' Mayr, 1861 *''

Lasius casevitzi ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species in ...

'' Seifert & Galkowski, 2016 *†''

Lasius chambonensis ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species i ...

'' Piton & Théobald, 1935 *''

Lasius chinensis ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species in ...

'' Seifert, 2020 *''

Lasius cinereus ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species i ...

'' Seifert, 1992 *''

Lasius citrinus ''Lasius'' is a genus of formicine ants. The type species for this genus is the black garden ant, ''Lasius niger''. Other major members, which live in drier heathland, are the cornfield ant, '' L. neoniger'', and '' L. alienus''. Other species in ...

'' Emery, 1922 *''

Lasius claviger ''Lasius claviger'', or the smaller yellow ant, is a species of ant belonging to the genus '' Lasius'', formerly a part of the genus (now subgenus) '' Acanthomyops''. Described in 1862 by Roger, the species is native to the United States ...

'' (Roger, 1862) *''Lasius colei'' (Wing, 1968) *''Lasius coloradensis'' Wheeler, 1917 *''Lasius coloratus'' Santschi, 1937 *''Lasius creightoni'' (Wing, 1968) *''Lasius creticus'' Seifert, 2020 *''Lasius crinitus'' (Smith, 1858) *†''Lasius crispus'' Wilson, 1955 *''Lasius crypticus'' Wilson, 1955 *''Lasius distinguendus'' (Emery, 1916) *''Lasius draco'' Collingwood, 1982 *''Lasius elevatus'' Bharti & Gul, 2013 *''Lasius emarginatus'' (Olivier, 1792) *†''Lasius epicentrus'' Théobald, 1937 *''Lasius escamole'' Reza, 1925 *''Lasius excavatus'' Seifert, 2020 *''Lasius fallax'' Wilson, 1955 *''Lasius flavescens'' Forel, 1904 *''Lasius flavoniger'' Seifert, 1992 *''

'' (Fabricius, 1782) *''Lasius fuji'' Radchenko, 2005 *''

'' (Latreille, 1798) *†''Lasius globularis'' (Heer, 1849) *†''Lasius glom'' LaPolla & Greenwalt, 2015 *''Lasius grandis'' Forel, 1909 *''Lasius hayashi'' Yamauchi & Hayashida, 1970 *''Lasius hikosanus'' Yamauchi, 1979 *''Lasius himalayanus'' Bingham, 1903 *''Lasius hirsutus'' Seifert, 1992 *''Lasius humilis'' Wheeler, 1917 *''Lasius illyricus'' Zimmermann, 1935 *†''Lasius inflatus'' (Zhang, 1989) *''Lasius interjectus'' Mayr, 1866 *''Lasius israelicus'' Seifert, 2020 *''Lasius japonicus'' Santschi, 1941 *''Lasius jensi'' Seifert, 1982 *''Lasius kabaki'' Seifert, 2020 *''Lasius karpinisi'' Seifert, 1992 *''Lasius koreanus'' Seifert, 1992 *''Lasius kritikos'' Seifert, 2020 *''Lasius lasioides'' (Emery, 1869) *''Lasius latipes'' (Walsh, 1863) *''Lasius lawarai'' Seifert, 1992 *†''Lasius longaevus'' (Heer, 1849) *''Lasius longiceps'' Seifert, 1988 *''Lasius longicirrus'' Chang & He, 2002 *''Lasius longipalpus'' Seifert, 2020 *†''Lasius longipennis'' (Heer, 1849) *''Lasius magnus'' Seifert, 1992 *''Lasius maltaeus'' Seifert, 2020 *''Lasius mauretanicus'' Seifert, 2020 *''Lasius meridionalis'' (Bondroit, 1920) *''Lasius mexicanus'' Wheeler, 1914 *''Lasius mikir'' Collingwood, 1982 *''Lasius minutus'' Emery, 1893 *''Lasius mixtus'' (Nylander, 1846) *†''Lasius mordicus'' Zhang, 1989 *''Lasius morisitai'' Yamauchi, 1979 *''Lasius murphyi'' Forel, 1901 *''Lasius myops'' Forel, 1894 *''Lasius myrmidon'' Mei, 1998 *''Lasius nearcticus'' Wheeler, 1906 *''Lasius neglectus'' Van Loon, Boomsma & Andrasfalvy, 1990 *†''Lasius nemorivagus'' Wheeler, 1915 *''Lasius neoniger'' Emery, 1893 *''Lasius nevadensis'' Cole, 1956 *''

Lasius niger ) , official_languages = , languages_type = National languages