Lasioglossum (Sphecodogastra) iridescens Hettiarachchi & Gibbs 2024

Lasioglossum (Sphecodogastra) iridescens sp. nov. Figs 3–7, 8A, 9A, 10A, 11A, 11B Diagnosis. Females of L. iridescens can be recognised by the combination of head short [Face length/width ratio = 0.80 (± 0.02 SD)]; presence of oily metallic sheen on mesoscutum and mesoscutellum (Fig. 8) (non-metallic in all other North American L. (Sphecodogastra); propodeum with lateral carinae reaching dorsal margin and oblique carina very strong; inner metatibial spur pectinate, basal branch longer than width of rachis (Figs. 11A, 11B); mesepisternum area with weakly rugose ventrally and reticulate-rugose to punctate dorsally (Fig. 9A); mesoscutum shiny, becoming tessellate to imbricate anteromedially. Lasioglossum iridescens is quite similar to the other two species described herewith. The other two species have the basal branch on the inner metatibial spur shorter than or subequal to the width of the rachis (Figs. 11C–11F). Lasioglossum iridescens has the mesepisternum with reticulate-rugose surface structure with large puncture dorsally (Fig. 9A) whereas the other two species have the mesepisternum rugose to reticulate-rugose mostly throughout (Figs. 9B, 9C), with punctation less distinct. Lasioglossum silveirai sp. nov. has sparser punctures on the supraclypeal area, mesoscutum, and mesoscutellum (Figs. 8C, 8D, 10C). All three species have an oily metallic sheen on the mesoscutum (Figs. 8A, 8B, 8C), but in L. silveirai this may be less evident in some individuals (Fig 8D). T 1 punctures appear deeper in L iridescens compared to others. Males of L. iridescens can be recognised by the combination of head short [Face length/width ratio 0.89 (± 0.03 SD)]; clypeus with yellow on distal half (Fig. 4B); mandible short, reaching near opposing clypeal angle; F2 long, nearly equal to scape (Fig. 4B); thorax with scattered tomentum; propodeum lateral carinae not reaching dorsal margin, oblique carina absent (Fig. 4D); metasomal sterna nearly bare, hairs present but very short (Fig. 4C). The retrorse lobe is long and broad, covered in short hairs, curved medially, which gives it a unique shape (Fig. 5). In combination with the short gonostylus with short setae, the genitalia should separate L. iridescens from most other L. (Sphecodogastra). Males of other two species described here are unknown. Males of other L. (Sphecodogastra) lack the combination of thoracic tomentum, metasomal sterna bare, and the genital characters. Most L. (Sphecodogastra) lack the tomentum and have elongate gonostyli, usually with elongate setae. Onagraceae-specialist L. (Sphecodogastra) may have similar pilosity and genitalia but have more evident sternal setae. Lasioglossum (Evylaeus) amicus (Cockerell) has an overall similar appearance, but again differs in the sternal setae, and the structure of the genitalia. Etymology. The specific epithet refers to the iridescent colouration of the new species. Holotype. USA — California • ♀; Riverside Co., 1.5 mi. W of Perris [33. 7820° N, 117.2547° W]; 1 April 1936; ex Salvia mellifera; P.H. Timberlake leg.; UCRC, GIBBS- 12353. [Verbatim label: 1 ½ miles W. / Perris, Cal. // on Salvia mellifera // Timberlake Coll. / Apr 1, 36 // Lasioglossum GIBBS- 12353 // Holotype / Lasioglossum (Sphecodogastra) iridescens Hettiarachchi and Gibbs] Paratypes. MEXICO — Baja California • 1 ♀; Ejido Piedras Gordas, Ensenada; 31.9369° N, 116.33833° W; 13 May 2021; A. Castañeda leg.; ex yellow pan trap; A. Castañeda Research Collection. USA — Arizona • 1 ♀; Pinal Co., Ray; [33.183° N, 110.998° W]; 28 Mar 1961; J.C. Bequaert leg.; ASUHIC • 1 ♀; Pinal Co., Superior, Boyce Thompson Arboretum; [33.2678° N, 111.1583° W]; 03 May 1953; G.D. Butler leg.; ex Thistle; ASUHIC • 1 ♀; ibid.; 03 May 1953; G.D. Butler leg.; ex Poppy; ASUHIC • 1 ♀; ibid.; 03 May 1953; G.D. Butler leg.; ex Opuntia; ASUHIC • 1 ♀; ibid.; 04 Jun 1962; F. Werner, J. Bequaert leg.; ASUHIC— California • 1 ♀; Kern Co., 1 mi. S of Red Rock Canyon; [35.3590° N, 117.9814° W]; 01 Apr 1959; G.I. Stage leg.; ex Tamarix gallica; UCRC • 1 ♀; Kern Co., Mojave-Deep Creek; [34.2712° N, 117.1307° W]; 26 Apr 1936; P. M. Opitz leg.; UCRC • 1 ♀; Los Angeles Co., 5 mi. S of Pearblossom; [34.4336° N, 117.9094° W]; 12 May 1956; E.G. Linsley leg.; EMEC • 1 ♀; Los Angeles Co., Littlerock—Palmdale Dam; [34.4856° N, 118.0247° W]; elev. 1036.3 m.; 02 May 1970; R. R. Snelling leg.; LACM • 1 ♂; Los Angeles Co., Vincent; [34.098242° N, 117.9228° W]; 04 Aug 1952; P.H. Timberlake leg.; ex flying about junipers; UCRC • 3 ♂♂; Riverside Co., 1.5 mi. W of Perris; [33.7820° N, 117.2547° W]; 13 Jun 1938; Timberlake leg.; ex Eriogonum fasciculatum; UCRC • 1♀; ibid.; 07 Apr 1940; P.H. Timberlake leg.; ex Salvia columbariae; UCRC • 1 ♀; ibid.; 04 May 1940; P.H. Timberlake leg.; ex Cryptantha intermedia; UCRC • 1 ♀; ibid.; 18 May 1940; P.H. Timberlake leg.; ex either Calylophus sp. or Camissonia sp. (verbatim: nr. Oenothera); nr. Oenothera; UCRC • 1 ♀; ibid.; 29 May 1940; P.H. Timberlake leg.; ex Eriogonum fasciculatum; UCRC • 2 ♂♂; ibid.; 21 Jun 1940; P.H. Timberlake leg.; ex Eriogonum fasciculatum; UCRC • 1 ♂; ibid.; 17 May 1941; P.H. Timberlake leg.; ex Cryptantha intermedia; UCRC • 1 ♀; Riverside Co., 2 mi. W of Perris; [33.7824° N, 117.2639° W]; 19 May 1936; P.H. Timberlake leg.; ex Lasthenia gracilis; UCRC • 1 ♀; Riverside Co., 3 mi. NE of Moreno; [33.9607° N, 117.2045° W]; 12 Apr 1963; J. Powell leg.; UCRC • 1 ♀; Riverside Co., 3 mi. W of Perris; [33.7821° N, 117.28° W]; 16 Apr 1939; P.H. Timberlake leg.; ex Lasthenia gracilis; UCRC • 1 ♀; Riverside Co., 4 mi. W of Perris; [33.7822° N, 117.2981° W]; 10 Apr 1946; P.H. Timberlake leg.; ex Platystemon californicus Benth.; UCRC • 1 ♀; Riverside Co., 4.5 mi. W of Perris; [33.7821° N, 117.3068° W]; 27 May 1946; P.H. Timberlake leg.; ex Gilia achilleifolia subsp. multicaulis; UCRC • 1 ♀; ibid.; 27 May 1946; P.H. Timberlake leg.; ex Cryptantha intermedia; UCRC • 1 ♀; Riverside Co., 5 mi. S of Sage; [33.5081° N, 116.9321° W]; 16 Apr 1965; C. A. Toschi leg.; UCRC • 2 ♀♀; ibid.; 16 Apr 1965; J. Powell leg.; UCRC • 1 ♀; Riverside Co., Aguanga; [33.4422 ° N, 116.8669° W]; elev. 605 m.; 09 May 1936; P.H. Timberlake leg.; ex Prosopis sp.; UCRC • 1 ♀; Riverside Co., Lake Elsinore; [33.6733° N, 117.3361° W]; elev. 440 m.; 13 Apr 1965; C. A. Toschi leg.; UCRC • 1 ♀; Riverside Co., Gavilan Hills; [33.7944° N, 117.3558° W]; elev. 620 m.; 09 May 1936; P.H. Timberlake leg.; ex Prosopis sp.; UCRC • 7 ♀♀; ibid.; 19 May 1936; P.H. Timberlake leg.; ex Rhus trilobata; UCRC • 1 ♂; ibid.; 29 May 1936; P.H. Timberlake leg.; ex Keckiella antirrhinoides; UCRC • 1 ♀; ibid.; 02 May 1937; P.H. Timberlake leg.; ex Salix; UCRC • 2 ♀♀; ibid.; 02 Mar 1938; P.H. Timberlake leg.; ex Salix lasiolepis; UCRC • 1 ♀; ibid.; 16 Mar 1938; P.H. Timberlake leg.; ex Ceanothus crassifolius; UCRC • 1 ♀; ibid.; 16 Mar 1938; P.H. Timberlake leg.; ex Salix laevigata; UCRC • 1 ♀; ibid.; 01 Apr 1938; P.H. Timberlake leg.; ex Rhus trilobata; UCRC • 1 ♀; ibid.; 01 Apr 1938; P.H. Timberlake leg.; ex Plagiobothrys collinus; UCRC • 1 ♀; ibid.; 08 Apr 1938; P.H. Timberlake leg.; ex Rhus trilobata; UCRC • 3 ♀♀; ibid.; 17 Apr 1938; P.H. Timberlake leg.; ex Lasthenia coronaria; UCRC • 1 ♀; ibid.; 17 Apr 1938; P.H. Timberlake leg.; ex Rhus trilobata; UCRC • 1 ♀; ibid.; 16 May 1938; P.H. Timberlake leg.; ex Salix laevigata; UCRC • 1 ♀; ibid.; 21 Jun 1938; P.H. Timberlake leg.; ex Eriastrum virgatum; UCRC • 1 ♀; ibid.; 24 Jun 1938; P.H. Timberlake leg.; ex Eriastrum virgatum; UCRC • 1 ♀; ibid.; 07 Apr 1939; P.H. Timberlake leg.; ex Camissonia contorta; UCRC • 1 ♀; Riverside Co., Gavilan Hills; [33.7944° N, 117.3558° W]; elev. 620 m.; ex flying near ground; 07 Apr 1939; P.H. Timberlake leg.; UCRC • 1 ♀; Riverside Co., Gavilan Hills; [33.7944° N, 117.3558° W]; elev. 620 m.; 07 Apr 1939; P.H. Timberlake leg.; ex Cryptantha intermedia; UCRC • 1 ♀; ibid.; 16 Apr 1939; P.H. Timberlake leg.; ex Camissonia contorta; UCRC • 1 ♀; ibid.; 16 Apr 1939; P.H. Timberlake leg.; ex Cryptantha intermedia; UCRC • 1 ♀; ibid.; 07 Apr 1940; P.H. Timberlake leg.; ex Salvia columbariae; UCRC • 1 ♀; ibid.; 14Apr 1940; P.H. Timberlake leg.; ex Salvia mellifera; UCRC • 1 ♀; ibid.; 14 Apr 1940; P.H. Timberlake leg.; ex Salvia columbariae; UCRC • 1 ♀; ibid.; 14 Apr 1940; P.H. Timberlake leg.; ex Chaenactis glabriuscula; UCRC • 2 ♀♀; ibid.; 14 Apr 1940; P.H. Timberlake leg.; ex Minuartia douglasii; UCRC • 1 ♀; ibid.; 14 Apr 1940; P.H. Timberlake leg.; ex Salvia mellifera; UCRC • 2 ♀♀; ibid.; 18 Apr 1940; P.H. Timberlake leg.; ex Salvia columbariae; UCRC • 2 ♀♀; ibid.; 18 Apr 1940; P.H. Timberlake leg.; ex Lasthenia gracilis; UCRC • 2 ♀♀; ibid.; 12 May 1950; P.H. Timberlake leg.; ex Hirschfeldia incana; UCRC • 1 ♀; ibid.; 12 May 1950; P.H. Timberlake leg.; ex Erysimum cheiranthoides; UCRC • 6 ♂♂; ibid.; 12 May 1950; P.H. Timberlake leg.; ex Eriogonum fasciculatum; UCRC • 1 ♀; ibid.; 16 May 1950; P.H. Timberlake leg.; ex Cryptantha intermedia; UCRC • 5 ♂♂; ibid.; 09 Jun 1950; P.H. Timberlake leg.; ex Eriogonum fasciculatum; UCRC • 1 ♀; ibid.; 14 Apr 1959; P.H. Timberlake leg.; ex Phacelia distans; UCRC • 1 ♀; ibid.; 24 June 1938 to 24 July 1938; P.H. Timberlake leg.; ex Eriastrum virgatum; UCRC • 2 ♂♂; ibid.; 24 June 1938 to 24 July 1938; P.H. Timberlake leg.; ex Adenostoma fasciculatum; UCRC • 1 ♀; Riverside Co., Lake Mathews; [33.825° N, 117.500° W]; elev. 260 m.; 11 Apr 1954; P.H. Timberlake leg.; ex Platystemon californicus; UCRC • 2 ♀♀; Riverside Co., Seven Level Hill,, ~10 Rd. mi. SW of Palm Desert; [33.6067° N, 116.4272° W]; elev. 1160 m.; 12 Apr 1963; J. Powell leg.; UCRC • 22 ♂♂; Riverside Co., Spring Crest, Ribbonwood; [33.5683° N, 116.4897° W]; elev. 1400 m.; 02 Jul 1936; P.H. Timberlake leg.; ex Eriogonum fasciculatum; UCRC • 1 ♂; Riverside Co., Spring Crest, Ribbonwood; [33.5683° N, 116.4897° W]; elev. 1400 m.; 13 Jun 1938; P.H. Timberlake leg.; ex Eriogonum fasciculatum; UCRC • 1♀; Riverside Co., Riverside; [33.9556° N, 117.3722° W]; elev. 290

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