Chlerogella nasus (Enderlein)

Figs 27–29, Map 2

Halictus nasus Enderlein, 1903: 38 .

Chlerogella nasus (Enderlein); Moure and Hurd, 1987: 218; Moure et al., 2007: 795.

Holotype. ♀, PERÚ: Departement Cuzco, Cosnipata-Ebene, 1000 m, 3 December 1900, S.V. Garlepp (ZMHB).

Additional material. PERÚ: 1♀, Dept. Cusco, Cock of the Rock Lodge, NE Paucartambo, 13º03.3'S, 71º32.7'W, 1120 m, 4–9-XI-2007 [4–9 November 2007], D. Brzoska, ex: flight intercept trap (SEMC).

Diagnosis. Chlerogella nasus is distinctive for the combination of its elongate malar space and dark brown coloration, with weak metallic highlights (Figs 27–29).

Description. Female: Total body length 9.44–9.64 mm; forewing length 6.80– 7.04 mm. Head length 2.58–2.60 mm, width 1.76–1.78 mm. Clypeus beginning just below lower tangent of compound eyes. Malar space 35.6–37.2% compound eye length (malar length 0.52–0.55 mm; compound eye length 1.46–1.48 mm) (Figs. 28–29). Upper interorbital distance 0.88–0.89 mm; lower interorbital distance 0.63–0.64 mm. 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 1.35–1.40 mm; mesoscutellum weakly convex, not bigibbous. Basal vein distad cu-a by two times vein width; 1rs-m distad 1m-cu by two times vein width; 2rs-m distad 2m-cu by five times vein width, 2rs-m gently arched; 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 slightly shorter than that of third submarginal cell; posterior border of third submarginal cell slightly more than 1.5 times longer than anterior border. Distal hamuli arranged 2-1-2. Inner metatibial spur with four branches (not including apical portion of rachis).

Clypeus and supraclypeal area imbricate with weak punctures separated by 0.5–2 times a puncture width; face with small, contiguous punctures, more widely spaced in malar space; punctures of face blending to imbricate integument in ocellocular area and vertex, with punctures separated by a puncture width or less; gena imbricate with small punctures separated by a puncture width; postgena imbricate and impunctate. Pronotum imbricate with scattered minute punctures; mesoscutum with small contiguous punctures, anteromedially punctures becoming weaker and integument distinctly imbricate; mesoscutellum and metanotum with small contiguous punctures. Preëpisternum strongly imbricate with coarse punctures separated by a puncture width or less; mesepisternum strongly imbricate with weak punctures separated by 2–5 times a puncture width; metepisternum finely imbricate. Propodeum strongly imbricate. Metasoma finely imbricate.

Figures 27–29. Female of Chlerogella nasus (Enderlein) . 27 Lateral habitus 28 Facial aspect 29 Lateral aspect of head.

Mandible dark brown except reddish at apex; labrum dark brown; clypeal apex dark brown to black, remainder of clypeus and head dark brown to nearly black with weak metallic copper-green highlights. Antenna dark brown except base of scape brown. Mesosoma dark brown to nearly black with weak metallic copper-green highlights (Fig. 27); tegula dark brown. Wing membranes lightly infumate; veins dark brown. Legs amber brown except procoxa dark brown with weak metallic copper-green highlights. Metasoma dark brown except amber brown on TI, TII except apical margin dark brown, and basal third of TIII (apical two-thirds dark brown).

Pubescence golden except intermingled with fuscous setae apically on metasoma.

Male: Unknown.