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Extracted from: Baker J.R., (1975). Taxonomy of Five Nearctic Subgenera of Coelioxys (Hymenoptera; Megachilidae). The University of Kansas Science Bulletin Vol. 50, No. 12, pp.649-730.
FEMALE. Agrees with description and figures of Coelioxys texana except as follows: (1) Length 9-13 mm; (2) integument grainy on vertex, dull on thorax, shiny on abdomen; black; scape, front coxal spine, and coxae piceous; pronotal lobe and tegula dark brown to brown; femora, tibiae and basitarsi dark brown to dark brown with ferruginous spots or segments to ferruginous throughout; latero-posterior margins of terga 1-4 and sometimes 5, and posterior margins of sterna 1-5 black to dark reddish-brown; (3) pubescence brown on apex of sternum 6; (4) ocular hairs 0.05-0.1 mm long; (5) margin of clypeus with 6 teeth about 0.05 mm long; clypeus sometimes with irregular impunctate line; (6) clypeoantennal distance shorter than lateral margin clypeus; (7) paraocular area hidden laterally by 02-0.3 mm setae; (8) rest of face with an indefinite impunctate line up to ocellar area; (9) clypeoantennal distance greater than antennocular distance and less than or subequal to interantennal distance; (10) ocellar area with arms of impunctate area medially separated by punctures in a band 2 or 3 punctures wide; impunctate area sometimes not as broad as in Figures 10, 11A; (11) ocelloccipital distance less than or subequal to interocellar distance which is less than ocellocular distance; (12) vertex with slender erect setae longer than shown in Figure 10, especially in interocellar area; (13) gena with ventral angle slightly acute; (14) hypostomal area of gena with setae as long as or longer than on disc; (15) mandible with outer tooth longer than shown in Figure 11 A, more like Figure 11C; (16) scutum with erect setae longer and more copious than shown in Figure 10; (17) mesepisternum with lateral face closely punctate, more punctures than minute punctures, pubescence slender and long (about 0.35 mm); (18) scutellum with posterior margin of dorsal surface almost straight to broadly curved in dorsal view; (21) front coxal spine flattened and rounded apically, slightly recurved posteriorly, inconspicuous; (22) tergum 6 rounded apically (Fig. 14B); (23) sternum 6 moderately to narrowly rounded apically (Fig. 14B).
MALE. Agrees with description and figures of Coelioxys texana except as follows: (24) Length 85-105 mm; (25) integument as in female (2 above); (27) ocular hairs 0.05-0.1 mm long; (28) clypeal margin and median line as in female (5 above); (29) clypeoantennal distance as in female (6 above); (32) clypeoantennal distance subequal to or greater than antennocular distance, less than interantennal distance; (33) ocellar area as in female (10 above); (34) ocellocular distance sub-equal to ocelloccipital distance, greater than interocellar distance; (35) vertex with more erect, slender setae than shown in Figure 12A; (36) gena as in female (13 above); (37) hypostomal area of gena as in female (14 above); (39) scutum as in female (16 above); (40) lateral surface of mesepisternum closely but distinctly punctured, pubescence as in female (17 above); (41) scutellum as in female (18 above); (44) front coxal spine 15 times longer than wide; (45) terga 3-5 sometimes lacking apical fasciae medially or entirely, carina of tergum 6 with irregular denticulations (Fig. 12E, F); (46) sterna M evenly punctate with squamose setae filling most or only a few punctures, apically with irregular fasciae 0.25-03 mm (maximum) wide; (47) sternum 6 with lateral setae resembling C. alternata (Fig. 13H).
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