Mayfly Species Baetisca rubescens (Armored Mayflies)

Abdominal tergites of male imago reddish brown, sternites paler reddish to yellowish brown; both wings flushed with reddish in the basal portions; longitudinal veins brown. (See frontispiece).

Head and thorax rather dark reddish brown. Legs yellowish brown; all joinings of fore leg narrowly reddish brown. Wings hyaline; the basal third and most of the costal margin of the fore wing, and most or all of the hind wing, flushed with reddish; in the hind wing this color is deepest at the base, fading gradually toward the outer margin. Longitudinal veins brown; cross veins pale, almost invisible. Abdominal tergites reddish brown, darker next to the pale pleural fold; sternites paler reddish to yellowish brown. Posterior margins of all segments rather dark reddish brown, most evident on the tergites. Forceps and tails pale yellowish; tail joinings slightly opaque, but not darker than the joints. Genitalia as in fig. 148.

The smaller size and darker legs separate this species from Baetisca carolina, which has the wings flushed with orange rather than with reddish.