Chlerogella picketti Engel, 2010

Engel, Michael, 2010, Revision of the Bee Genus Chlerogella (Hymenoptera, Halictidae), Part II: South American Species and Generic Diagnosis, ZooKeys 47 (47), pp. 1-100 : 76-78

Chlerogella picketti Engel , sp. n.

urn:lsid:zoobank.org:act:AB78C966-2C49-4C2B-BB77-787024DBECFB

Figs 126–128, 137–138, Map 4

Holotype. ♁, COLOMBIA: Nariño, Barbacoas , 40 m, 1.x.1990 [1 October 1990], M. Cooper ( COOP).

Diagnosis. Among relatively short-faced species of Chlerogella , C. picketti is distinctive for its metallic green coloration (Figs 126–128), setation of the metafemur (vide infra), and male terminalia (Figs 137–138).

Description. Male: Total body length 8.09 mm; forewing length 5.33 mm. Head length 2.16 mm, width 1.56 mm. Clypeus beginning above lower tangent of compound eyes. Malar space 18.8% compound eye length (malar length 0.26 mm; compound eye length 1.38 mm) (Figs 127–128). Upper interorbital distance 0.70 mm; lower interorbital distance 0.39 mm. First flagellomere about as long as pedicel, about as long as wide; second flagellomere three times length of first flagellomere; ventral surfaces of second through eleventh flagellomeres densely covered in placoid sensilla, placoid fields not disrupted. Upper portion of pronotum medially depressed, not elongate, medially less than 0.25 times ocellar diameter in length; ventral portion of preëpisternal sulcus not broad, similar to scrobal sulcus and upper portion of preëpisternal sulcus; intertegular distance 1.17 mm; mesoscutellum weakly bigibbous. Basal vein distad cu-a by three times vein width; 1rs-m distad 1m-cu by four times vein width; 2rs-m distad 2m-cu by six times vein width, 2rs-m straight; first submarginal cell longer than combined lengths of second and third submarginal cells; second submarginal cell slightly narrowed anteriorly, anterior border of second submarginal cell along Rs about 0.8 times as along as that of third submarginal cell; posterior border of third submarginal cell about 2.5 times as long as anterior border. Distal hamuli arranged 2-1-2. Inner metatibial spur minutely ciliate. Apical margin of SIII entire; apical margin of SIV broadly and weakly concave medially, produced lateral to concavity as short broad setose lobes, without furrow in apical half of disc;

Figures Ι26–Ι28. Holotype male of Chlerogella picketti sp. n. Ι26 Lateral habitus Ι27 Facial aspect Ι28 Lateral aspect of head.

apical margin of SV entire; apical margin of SVI emarginate; terminalia as depicted in figures 137 and 138.

Clypeus and supraclypeal area imbricate with weak punctures separated by 1–2 times a puncture width; face with small, punctures separated by a puncture width or less, integument between punctures smooth, more widely spaced in malar space; punctures of face blending to smooth integument in ocellocular area and vertex, with punctures separated by 1–1.5 times a puncture width; gena smooth with small punctures separated by 1–2 times a puncture width; postgena imbricate and impunctate. Pronotum finely imbricate with minute punctures separated by 1–3 times a puncture width; mesoscutum smooth with small punctures separated by 0.5–1.5 times a puncture width, anteromedially punctures becoming faint and integument somewhat imbricate; mes- oscutellum smooth with small punctures separated by a puncture width; metanotum finely imbricate with minute punctures separated by a puncture width. Preëpisternum smooth with punctures separated by a puncture width or less; mesepisternum smooth with small punctures separated by 0.5–2 times a puncture width; metepisternum finely imbricate. Propodeum strongly imbricate. Metasoma finely imbricate.

Mandible pale yellow except reddish at apex; labrum pale yellow; clypeal apex with narrow longitudinal band of pale yellow, remainder of clypeus and head brilliant metallic green with copper or golden highlights, principally on clypeus and supraclypeal area. Antenna dark brown. Mesosoma brilliant metallic green with copper or golden highlights (Fig. 126); tegula dark brown. Wing membranes faintly infumate; veins dark brown. Legs dark brown. Metasoma dark brown.

Pubescence white to somewhat golden on legs and apically on metasoma. Typical gender pilosity except postgena with numerous elongate, sinuate setae, such setae with short apical branches; inner surfaces of trochanters (particularly dense on protrochant- er), mesofemur, and metacoxa with elongate, apically-plumose setae, similar setae on inner surfaces of metatrochanter, base of metafemur, and metatibia except largely simple and somewhat sinuate. Apical margin of SIII with diffuse fringe of moderate-length white setae; SIV with small medioapical pads of short golden to fuscous setae bordering medial emargination; SV laterally with diffuse areas of long, inwardly-curved setae.

Female: Unknown.

Etymology. The specific epithet is a patronym honoring dear friend and colleague, Dr. Kurt M. Pickett of the University of Vermont, a leading authority on the systematics of Vespidae .