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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 rufitarsis except as follows: (1) Length 9.5-13 mm; (2) integument black; tegula, legs ferruginous to fulvous; lateral margins of metasomal terga 1 and 2, posterior areas of sterna 2-5 ferruginous; (3) pubescence white, brownish tinge on face and thorax; ocular hairs light brown; golden on tarsi; (4) ocular hairs medium to long (about 1.3 mm); (5) clypeus uniformly covered with short appressed setae and erect brown setae (about 0.25 mm long); (7) paraocular area obscured laterally by setae about 03 mm long; (11) interocellar and ocellocipital distances subequal, less than ocello-cular distance; (12) vertex slightly more closely punctured than shown in Figure 21; (13) gena with ventral angle slightly less than 90°; (15) mandible with hump on outer surface slightly less conspicuous than shown in Figure 22F; (16) scutum with anterolateral fascia more conspicuous and erect setae on disc less conspicuous than shown in Figure 21; (18) scutellum with posterior margin less rounded than shown in Figure 21; (20) metanotum with erect setae; (22) tergum 6 not as angled laterally as shown in Figure 21, more like Figure 24J.
MALE. Agrees with description and figures of Coelioxys rufitarsis except as follows: (24) Length 9-11 mm; (25) in-tegument as in female (2 above), terga 2-4 with lateral margins ferruginous; (26) pubescence as in female (3 above); (27) ocular hairs long (about 0.15 mm); (28) clypeus obscured by copious long (about 0.5 mm) setae; (30) paraocular area obscured laterally by long (up to 0.6 mm) setae; (31) rest of face rugose with long (up to 0.6 mm) setae sometimes obscuring integument; (34) ocelloccipital distance greater than interocellar distance, less than ocellocular distance; (35) vertex as in female (12 above); (36) gena as in female (13 above); (37) hypostomal area of gena with anterior fascia of excavation shorter than genal setae; (39) scutum as in female (16 above); (41) scutellum as in female (18 above); (43) metanotum as in female (20 above); (45) fovea on tergum 2 about 0.05 mm long, about 0.1 mm. wide as shown in Figure 25G; (47) margin of sternum 5 slightly emarginate; sternum 8 with setae longer, more abundant than shown in Figure 26E; genital armature with copious, long (half the length of gonocoxite) setae on gonocoxite.
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