Lasioglossum pavoninum (Ellis, 1913)
Properties
Scientific Name: Lasioglossum pavoninum (Ellis, 1913)
Common Name: Peacock Sweat Bee
Taxonomy
Halictus pavoninus Ellis, 1913: 206 [♀].
Holotype ♀. USA, Colorado, Tolland, altitude 8,900 ft, near the Mountain Laboratory [USNM no. 23332].
Halictus (Chloralictus) evestigatus Sandhouse, 1924: 27 [♂]. Synonymy by Gibbs (2010: 241).
Holotype ♂. USA, Colorado, Ward, 10 August [no year provided], by T.D.A. Cockerell [USNM no. 26425].
Halictus (Chloralictus) pikei Sandhouse, 1924: 28 [♂]. Synonymy by Gibbs (2010: 241).
Holotype ♂. USA, Colorado, Printing Office, Pikes Peak, alt. 10,000 ft., 17 September [no year provided], by T.D.A. Cockerell [USNM no. 26426].
Halictus (Chloralictus) abietum Michener, 1936: 281 [♀, ♂]. Synonymy by Gibbs (2010: 241).
Holotype ♀. USA, Colorado, Long Peak Inn, 9000ft., 26 August 1934, by T.D.A. Cockerell [CAS no. 4715].
DNA Barcode Index Number (BIN): BOLD:AAF4051
Diagnosis: The female of Lasioglossum pavoninum is one of five species of Dialictus in Canada that lack an acarinal fan (with L. rufulipes (Cockerell, 1938), L. immigrans Gardner and Gibbs 2021; L. versans (Lovell, 1905), and the L. ruidosense (Cockerell, 1897) species complex – see Gardner and Gibbs 2021), and can be distignuished from these by having a weak to absent oblique lateral carina on the propodeum (strong in L. rufulipes and L. immigrans), and the metasomal terga green, with the apical margins reddish brown (dark brown in L. versans and members of the L. ruidosense species complex.
Males of L. pavoninum can be recognised by the bright yellow apical mark on the clypeus which is shared with males of L. pruinosum (Robertson, 1892), L. leucocomus (Lovell, 1908), L. zephyrus (Smith, 1853), L. hudsoniellum (Cockerell, 1919), L. pictum (Crawford, 1902), L. rufulipes (Cockerell, 1938), L. testaceum (Robertson, 1897), L. georgeickworti Gibbs, 2011, L. admirandum (Sandhouse, 1924), L. sagax (Sandhouse, 1924) – all of which have the punctures of the mesoscutum sparse medially (interspaces ≥ 1 puncture diameter). Males of L. pavoninum, L. succinipenne, and L. pilosum have the have the punctures of the mesoscutum dense medially (≤ 1 puncture diameter). Males of L. pavoninum have the clypeus yellow in the apical half, and punctures absent on the apical impressed areas of the metasomal terga, while L. succinipenne, and L. pilosum have the yellow limited to the apical margin, and the apical areas of the metasomal terga punctate.
In the key to males provided by Gardner and Gibbs (2021), L. pavoninum can be reached at couplet 3 by interpreting the punctures of the mesoscutum sparse medially (interspaces ≥ 1 puncture diameter, to couplet 4), or dense (interspaces ≤ 1 puncture diameter, to couplet 91), though when following the first option, when you reach couplet 87 you must interpret them as dense (≤ 1 puncture diameter).
Distribution in Canada: Gibbs 2010 [YT, NT, AB, MB]; Sheffield et al. 2014 [AB, MB]; Gibbs et al. 2023 [MB].
Additional specimens are known from AK [BOLD].
Body length: ♀ 5.2 - 5.8 mm ♂ 5.0 - 5.4 mm
Forewing length: ♀ 4.1 - 4.3 mm ♂ 3.7 - 3.8 mm
References
Ellis MD (1913) Seven new North American bees of the genus Halictus (Hym.). Entomological News 24(5): 205-211.
Gibbs J (2010) Revision of the metallic species of Lasioglossum (Dialictus) in Canada (Hymenoptera, Halictidae, Halictini). Zootaxa 2591: 1-382.https://doi.org/10.11646/zootaxa.2591.1.1
Michener CD (1936) Some bees of the genus Halictus. Annals and Magazine of Natural History, Series 10 18(104): 281-289.https://doi.org/10.1080/00222933608655192
Sandhouse GA (1924) New North American species of bees belonging to the genus Halictus (Chloralictus). Proceedings of the United States National Museum 65: 1-43.
Sheffield CS, Frier SD, Dumesh D (2014) The bees (Hymenoptera: Apoidea, Apiformes) of the Prairies Ecozone, with comparisons to other grasslands of Canada. In: Giberson DJ, Cárcamo HA (Eds) Arthropods of Canadian Grasslands (Volume 4): Biodiversity and Systematics Part 2. 4. Biological Survey of Canada, Ottawa, 479 pp. [ISBN 978-0-9689321-7-9].https://doi.org/http://dx.doi.org/10.3752/9780968932179.ch11
Gibbs J, Hanuschuk E, Miller R, Dubois M, Martini M, Robinson S, Nakagawa P, Sheffield CS, Onuferko T (2023) A checklist of the bees (Hymenoptera: Apoidea) of Manitoba, Canada. The Canadian Entomologist 155: E3.https://doi.org/10.4039/tce.2022.45
Sociality: Presumed Eusocial
Nesting: Ground
Pollen Specialization: Broad Oligolecty
Wintering Stage: Mated Female
Crop Preference: Not Available
Non Crop Preference: Chamaenerion angustifolium
Distribution: Alaska, Alberta, Manitoba, Northwest Territories, Yukon
Ecozone: Boreal Cordillera, Boreal Plains, Boreal Shield, Montane Cordillera, Prairie, Taiga Cordillera, Taiga Plains, Taiga Shield