Antennae (basal portion) of female Epeolus spp. illustrating relative length to width of F2: A E. attenboroughi paratype, with F2 not noticeably longer than wide B E. rufulus holotype, with F2 noticeably longer than wide C E. gibbsi holotype, with F2 not noticeably longer than wide D E. inornatus paratype, with F2 noticeably longer than wide E E. barberiellus, with F2 as wide as long, or nearly so, and F E. banksi, with F2 noticeably longer than wide. Scale bars 0.5 mm.