Male: A C. randolphi, S1 process†, lateral view showing perpendicular truncate apex and parallel margins B C. randolphi, metatibia >0.5× as deep as long, summit of ventral convexity at ~0.85× tibial length C C. randolphi, ventral metatibial carina toothed near apex, posterior carina present but weakly defined basally D C. mantagua, S1 process†, lateral view showing oblique apex and apically convergent margins E C. mantagua, metatibia ~2.1× as long as maximum depth, summit of ventral convexity at two-thirds tibial length F C. deserticola, ventral metatibial carina with rounded inflection near apex, posterior carina absent basally; scale bars 0.25 mm.