Figure 6. Temporal changes in setal color in pupal (A) and callow (B) stages.

For (A) metasomal setal color development at late pupal stages of B. impatiens visible upon removal of the pupal cuticle. For (B) prospective yellow, black, and red hairs are indicated by yellow, black, and red arrows, respectively. Note the shift in setal color as the callow gets older, as well as the difference between yellow, black, and red setae in the timing of pigmentation. Yellow setae appear to be white until 24–48 h after eclosion, when black and red hairs are nearly fully pigmented.