Megachile (Argyropile) sabinensis Mitchell Mitchell 1934: 348, Ψ. Type locality: Sabinal, Texas, USA. Type repository: USNM. Mitchell, 1937: 57; 1943a: 13. Ayala et al. 1997: 455 [distribution in Mexico] Yañez-Ordóñez & Hinojosa-Díaz 2004: 188 [distribution in Mexico] Description. Male. As described for M. rossi, except: body length, 11.2 mm (± 0.44, 10.4–11.9); forewing length, 7.3 mm (± 0.1, 7.1–7.5). Interalveolar distance 1.5 times longer than alveolorbital distance, the latter about twice as long as antennal socket diameter; interocellar distance slightly longer than ocellocular; ocelloccipital distance slightly shorter than interocellar distance, about 2.5 OD; clypeus 1.9 times wider than long, slightly elevated, flat in profile, apical margin as in Fig. 24; mandible tridentate as in Figs. 18–20; scape 2.4 times longer than broad, pedicel 1.2 times wider than long, slightly narrower than F1–F3, individually; F1 about 1.5 times longer than pedicel, shorter (0.8) than F2 and F3 individually. Front coxal spine as in Fig. 27; fore femur twice as long as wide; fore tibia about 2.4 times longer than wide; hind tibia 3.2 longer than wide; hind basitarsus about 2.3 times longer than wide. T6, T7, S5, S6, S8, genitalia as in Figs. 32, 35, 38, 41, 44, 47, 50. Pubescence. In general, shorter than in M. rossi; disc of front coxa with dense patch of erect, simple, stiff ferruginous setae. Punctation. Clypeus with punctures coarser than, and T6 with punctures sparser (especially on center of disc) than in M. rossi. Material examined. USA. Arizona: 1♂, Portal, 10 mi E, 15 Sep 1955, G. E. Bohart. MEXICO. Chihuahua: 1♂, Reserva Biosfera Mapimi, dunes N estacion., E of Ceballos, 22 Aug 1991, T. Griswold; 1♂, Samalayuca, 9 km S, 30 Aug 1991, R. L. Minckley; 1♂, Janos, 35 km NW, ex: Dyssodia, 31 Aug 1991, R. L. Minckley [SEMC]. Distribution. Southwestern United States to northern Mexico. Floral records. Aster, Baileya multiradiata, Dyssodia, Encelia virginensis, Eriogonum— Polygonaceae, Haplopappus, Helianthus, Hymenothrix wizlizeni, Larrea tridentata— Zygophyllaceae, Machaeranthera pinnatifida, M. canescens, Pectis papposa, Tamarix gallica— Tamariaceae.

Published as part of Gonzalez, Victor H. & Griswold, Terry L., 2007, A review of the North and Central American Megachile subgenus Argyropile Mitchell (Hymenoptera: Megachilidae), pp. 1-14 in Zootaxa 1461 on page 6, DOI: 10.5281/zenodo.176447