|
Extracted from: Gardner, J. and J. Gibbs. 2020. The ‘red-tailed’Lasioglossum(Dialictus) (Hymenoptera: Halictidae)of the western Nearctic. European Journal of Taxonomy 725: 1–242.
Diagnosis Females of Lasioglossum hudsoniellum can be recognized by the face shiny with dense but distinctly separated and similarly-sized punctures over the frons and paraocular area, mesepisternum with crowded punctures (i = 0 pd), scutum usually moderately densely and evenly punctate (i ≤ 1–2 pd), T1 usually with moderately dense punctures (i = 1–2 pd) outlining distinct impunctate apicolateral ovals (present but less distinct in most other species), pronotal angle usually about 90 degrees, postgena shiny, and T2 without dark spiracular spots. They are most similar to L. spivakae sp. nov., L. arenisaltans sp. nov., and L. lilianae sp. nov. Females of L. spivakae sp. nov. have the scutum punctures with interspaces 2–3 pd wide immediately mesad of the parapsidal line, metasoma with tomentum mostly restricted to T3–4, pronotal angle obtuse, and metasomal terga usually with sharply delineated brown to black bands. Females of L. arenisaltans sp. nov. have the frons punctures crowded and indistinct, scutum punctures very dense (i < 1 pd), postgena lineate, and T2 with dark spiracular spots. Females of L. lilianae sp. nov. have the scutum and T1 more finely and sparsely punctate (i = 1–4 pd in part).
Males of L. hudsoniellum can be recognized by S5 apical rim strongly concave, flagellomeres relatively short (F2 about 1.25 times as long as F1 and about as long as broad), face below eye emargination covered in dense tomentum, T1–3 rims usually moderately densely punctate (i = 1–2 pd), and T1–5 with abundant tomentum. They are most similar to L. arenisaltans sp. nov. and L. imbriumbrae sp. nov. Both of these species have S5 apical rim straight and metasoma with tomentum sparse or absent. In addition, males of L. arenisaltans sp. nov. have the flagellomeres relatively longer (F2 about 1.75 times as long as F1 and 1.5 times as long as broad), and males of L. imbriumbrae sp. nov. have T1–3 rims impunctate.
RemarksLasioglossum hudsoniellum is undoubtedly the most common and widespread of the red-tailed L.(Dialictus). It occurs in all habitats from prairies to mountains to deserts. There is considerable variation in several characters over its range, which has led to much confusion with identification. Specimens from the easternmost part of its range in the Great Plains often have a black metasoma (even in the female), specimens from the western deserts often have pale wings with white hairs, and specimens from Texas and Mexico often have sparser punctures of the mesosoma and T1. In addition, there is significant variation in the length of the face, but this does not seem to be correlated with any other characters.Given such extreme morphological, genetic, and geographic variation, L. hudsoniellum seems likely to include some cryptic species. However, clear consistencies between these sources of variation cannot be found to support a species hypothesis.
Retrieved from: Gibbs, J. 2010. Revision of the metallic species of Lasioglossum (Dialictus)in Canada (Hymenoptera, Halictidae, Halictini). Zootaxa; 2591, 140-144
Halictus hudsoniellus Cockerell, 1919: 290. ♀.
Holotype. ♀ USA, Colorado, Longs Peak Trail, Hudsonian Zone, 22.vii. (Cockerell); [NMNH: 27765]. Examined.
Taxonomy. Michener, 1951: Lasioglossum (Chloralictus) hudsoniellum, p. 1114 (catalogue); Hurd, 1979:
Dialictus hudsoniellus, p. 1966 (catalogue); Moure & Hurd, 1987: Dialictus hudsoniellus, p. 104 (catalogue).
Diagnosis. See diagnosis for L. pictum.
Redescription. FEMALE. Length 3.97�5.37 mm; head length 1.13�1.30 mm; head width 1.13�1.32 mm;
forewing length 2.56�3.11 mm.
Colouration. Head and mesosoma bluish green to golden green. Labrum reddish brown to orange-yellow.
Mandible orange to yellow. Clypeus reddish brown to orange. Supraclypeal area with bronze reflections.
Antenna dark brown, F2�F10 with ventral surface orange-brownish yellow. Tegula pale amber. Wing membrane
hyaline, venation and pterostigma pale brownish yellow. Legs brown, tibial bases and apices, and basitarsus
suffused with orange to brownish yellow, medio- and distitarsi brownish yellow to orange. Metasoma
mostly pale orange-yellow, terga and sterna with apical impressed margins translucent yellow, T3�T5 suffused
with reddish brown, T3�T4 lateral reflexed portion with dark brown spot.
Pubescence. White to dull white. Moderately dense. Head and mesosoma with moderately dense woolly
hairs (1�1.5 OD), longest on genal beard, metanotum and mesopleuron (2�2.5 OD). Lower paraocular area and gena with dense white tomentum, obscuring surface. Frons with sparse tomentum. Pronotum dorsolateral
angle and lobe with dense tomentum. Mesoscutum and mesepisternum with sparse tomentum. Metanotum
and metepisternum with dense tomentum. Propodeum with moderately sparse plumose hairs on lateral and
posterior surfaces (2�2.5 OD). Metasomal terga with sparse, fine setae. T1 acarinarial fan sparse, with dorsal
opening (obscure on pale background). T1 dorsolateral portion with tomentum. T2 basal portion and T3�T5
entirely with dense tomentum largely obscuring surface. T2 apicolateral and T3�T4 apical margins with weak
fringes.
Surface sculpture. Face polished, punctation fine. Clypeal punctation moderately sparse (i=1�2.5d). Supraclypeal
area with punctation moderately sparse (i=1�2.5d). Lower paraocular and antennocular areas with
punctation dense (i≤d). Upper paraocular area and frons reticulate-punctate. Ocellocular area minutely punctate
(i=d). Gena lineolate. Postgena polished and shining. Mesoscutum weakly imbricate-tessellate, polished
submedially, punctation fine, moderately dense between parapsidal lines (i=1�1.5d), dense laterad of
parapsidal line and on anterolateral portion (i≤d). Mesoscutellum similar to mesoscutum, submedial punctation
moderately dense (i=1�2d). Axilla punctate. Pre�pisternum and hypoepimeral area weakly reticulate.
Mesepisternum polished, punctate (i≤d). Metepisternum with dorsal half rugoso-striate, ventral half imbricate.
Metapostnotum incompletely rugoso-striate, posterior margin imbricate. Propodeum with dorsolateral slope
imbricate, lateral surface imbricate-tessellate, posterior surface tessellate. Metasomal terga polished except
apical impressed areas weakly coriarious, punctation on basal halves moderately dense (i=1�2d), sparser on
apical halves (i=1�3d).
Structure. Head moderately elongate (length/width ratio = 1.00�1.02). Eyes convergent below (UOD/
LOD ratio = 1.13�1.21). Clypeus protruding ��2/3 below suborbital line, apicolateral margins convergent.
Antennal sockets close (IAD/OAD < 0.5). Frontal line carinate, ending 2 OD below median ocellus. Gena
narrower than eye. Inner metatibial spur pectinate with 3 teeth. Metapostnotum moderately elongate to truncate
(MMR ratio = 1.11�1.38), posterior margin weakly angled onto posterior surface. Propodeum with
oblique carina weak, lateral carina weak, not reaching dorsal margin.
MALE. As in female except for the following. Length. 3.23�4.21 mm; head length 1.06�1.20 mm; head
width 1.06�1.18 mm; forewing length 2.50�2.99 mm.
Colouration. Labrum and mandible pale yellow. Clypeus with apical half yellow. Tibial bases and apices
and tarsi yellow. Metasomal terga reddish brown, terga and sterna marginal zones reddish orange to translucent
yellow.
Pubescence. Face below eye emargination with dense tomentum obscuring paraocular area and partially
obscuring clypeus and supraclypeal area. Metasomal terga with sparse lateral tomentum. S2�S5 apical margin
with subappressed hairs (1�1.5 OD).
Surface sculpture. Surface more polished, punctation stronger. Mesoscutum polished, punctation moderately
sparse between parapsidal lines (i=1�2d), closer laterad of parapsidal lines (i≤d), contiguous on anterolateral
portions. Mesepisternum closely punctate (i≤d). Propodeum with dorsolateral slope obscurely
punctate, lateral surface reticulate-punctate. Metasomal terga punctation deep and distinct across disc (i=1�
1.5d), medial portion of apical impressed area impunctate.
Structure. Head moderately elongate (length/width ratio = 1.00�1.02). Eyes convergent below (UOD/
LOD ratio = 1.39�1.40). Clypeus protruding � below suborbital line, apicolateral margins subparallel. Antennal
sockets distant (IAD/OAD > 1.0). Frontal line carinate, ending 2 OD below median ocellus. Pedicel and
F1 subequal. F2 length 1.3X F1. F2�F10 short (length/width ratio = 1.11�1.25). Metapostnotum truncate
(MMR ratio = 1.25�1.38), posterior margin weakly angled onto posterior surface.
Terminalia. S7 with median lobe weakly clavate, apex weakly rounded (Fig. 117G). S8 with apicomedial
margin strongly convex (Fig. 117G). Genitalia as in Fig. 117E�F. Gonobase with ventral arms narrowly separated.
Gonostylus large, covered in medially directed setae. Retrorse lobe narrow, weakly attenuated apically.
Range. Alberta south to Arizona, New Mexico east to Colorado, Texas (Fig. 113).
Additional material examined. CANADA: ALBERTA: 2♀♀ Writing-On-Stone P.P., Sand-North, 18�
25.vii.1990 (D. McCorquodale); 2♀♀ Writing-On-Stone P.P., Sand-North, 1.viii.1990 (M. Klassen); [PMAE];
USA: ARIZONA: 1♀Cochise Co., San Bernardino NWR, N31.33627 W109.26752, 5.vii.2001 (R. Minckley);
COLORADO: 1♀ Boulder Co., N40�5�45.8�� W105�16�45.9��, 7.vii.2007 (Kearns & Oliveras); 1♂ El
Paso Co., Colorado Springs, N38.82539 W104.85979, 1886 m, 30.vii.2007 (Gibbs & Sheffield); [PCYU];
NEBRASKA: 1♀ Lincoln Co., 8�14 mi. NNW North Platte, 8.viii.1971 (J.G, S.L. & K.C. Rozen); [AMNH];
NEW MEXICO: 1♀1♂ Chaves Co., 5 km S of Roswell, Hwy 285, N33.36177 W104.51238, 1108 m,
10.viii.2007 (Gibbs & Sheffield); 1♂ Hidalgo Co., 24.5 mi S of Animas, 23.viii.2007 (J. Gibbs); 1♀ Socorro
Co., Sevilleta NWR, 18.iv�2.v.2006 (K. Wetherill); 1♀ Socorro Co., Sevilleta NWR, 17�31.v.2005 (K. Wetherill);
1♀ Socorro Co., Sevilleta NWR, 5�19.x.2004 (K. Wetherill); NEVADA: 1♀ Clark Co., Beehive Rck.,
0.69 mi N, 11S N4033280 E719578, 23.viii.2005 (E. North); 1♀ Clark Co., Yucia Forest, 2.04 mi S, 11S
N4041165 E664348, 5.vii.2005 (S. Higbee); TEXAS: 3♀♀ Denton Co., N33.2043 W097.0816, 27.iv.2002
(H.W. Ikerd); 1♂ J. Davis Co., 0.5 mi S of Kent, 29.v.1999 (L. Packer); 1♀ J. Davis Co., 9 mi S of Kent,
29.v.199 (L. Packer); 1♀ Jeff Davis Co., 20 km S of Kent, 30.iv.2003 (Packer & Fraser); 1♀ Lasalle Co.,
Chaparral Wildlife Management Area, 15.v.2003 (L. Packer); UTAH: 1♀ Kane Co., Buck Tank Draw, 4 mi
SW Haycock Pt., 12S N4104680 E437471, 7.viii.2002 (J Wilson); 1♀ Kane Co., 1.33 mi SSW Cougar Knoll,
12S N4127393 E486658, 7.vii.2002 (C. Davidson); 1♀ Kane Co., 2.3 mi NNW White Point, 12S N4155408
E471555, 17.ix.2001 (K. Moredock); 1♀ Washington Co., 0.5 mi WSW Stave Spr., 12S N4126314 E330668,
23.vi.2006 (B. Hays & F. Nicklen); 1♀ Washington Co., 1.12 mi WSW Stave Spr., 12S N4124985 E329425,
24.v.2006 (F. Nicklen & B. Hays); 1♀ Washington Co., 1.12 mi WSW Stave Spr., 12S N4124985 E329425,
7.vi.2006 (B. Hays & F. Nicklen); 1♀ Washington Co., 1.88 mi NNW Rimrock Spr., 12S N4116443 E319220,
2.v.2006 (B. Hays); [PCYU].
Floral records. ASTERACEAE: Ericameria nauseosa, Baileya multiradiata, EUPHORBIACEAE: Croton
wigginsii, FABACEAE: Astragalus ampullarius, TAMARICACEAE: Tamarix chinensis, Tamarix,
ZYGOPHYLLACEAE: Larrea tridentata.
Biology. Hurd & Linsley, 1975: 29 (floral relationship with Larrea).
Comments. Rare in Canada. Common in the southern parts of its range.
Extracted from: Cockerell T.D.A. (1919). The Bees of the Rocky Mountain National Park (Hymenop.). Entomological News Vol. 30.
Female. Length about 5 mm.; slender, with unusually pointed abdomen ;head and thorax olive-green. the scutellum and mesopleura more glaucous green ; labrum and apical half of mandibles red; flagellum strongly reddened except at base; puhescence pure white; legs black, with the knees, tibiae at apex and the tarsi reddened; tegulae yellowish testaceous; wings hyaline, stir;ma and nervures testaceous, subcostal nervure black; abrlomen apricot-color, shining, the third and following segments pruinose with white hair. Head subcir.cular; front shining; mesothorax dullish, finely punctured; scutellum shining; area of meta-thorax appearing minutely granular, but under compound microscope showing irregular \'ermiform anastomosing raised lines; the meso- thorax posteriorly is more or less (microscopically) transversely sul- catulate: hind spur with four large spines.
|
