Numbers
Six species: C. sipho (Say), C. scaber (Loew), C. furcatus (Van Duzee), C. brimleyi Robinson, C. viridicoxa (Aldrich), C. longitalus (Van Duzee)
Identification
Wings marked, often somewhat faded
Femora and tibiae entirely yellow
Remarks
Six species distinguished by male secondary sexual characters:
sipho has a row of bristles on the mid tibia and not on the mid basitarsus
scaber has a row of bristles on both tibia and basitarsus, and yellow fore coxae
viridicoxa has a row of bristles on both tibia and basitarsus, and non-yellow fore coxae
brimleyi has a plain mid tibia and mid basitarsus covered anteriorly with small, stiff scales, as well as a row of small hairs at the base
furcatus and longitalus do not have long rows of uniformly spaced bristles
Contributed by
John F. Carr on 14 December, 2010 - 6:32pm
Additional contributions by
zdankoLast updated 5 December, 2022 - 8:04am