Mayfly Species Sparbarus flavus (Angler's Curses)

Mesonotum straw to canary yellow; fore femur light purplish brown; abdomen pale whitish, tergites 8-10 with a black mid-dorsal streak.

Male—Head pale red-brown; a narrow black median line on vertex, and a transverse black line between ocelli; eyes black, lateral ocelli grey; antennae whitish. Pronotum yellowish, shaded with faint purplish brown in median area, around base of leg, and on the lateral and posterior margins. Mesonotum straw to canary yellow, deeper yellow posteriorly; median line, and suture on each side of this, narrowly blackish brown, most evident near center of sclerite. Metanotum bright yellow, shaded with purplish brown in the posterior half. Pleura yellow; a smoky mark below each wing; antero-lateral area above sternum shaded with purplish brown. Sternum yellow; anterior margin and antero-lateral areas of mesosternum shaded with purplish brown. Fore coxa and femur light purplish brown; tibia pale smoky at base, becoming silvery white apically; tarsus silvery white. Middle and hind legs wholly whitish. Wings semi-hyaline whitish; subcosta and radius shaded with purplish, which in the region of the bulla forms a faint wash in the costal space, leaving hyaline areas at base and apex of this space; all longitudinal veins in anterior half of wing purplish, the color fading out toward the margin: other veins colorless.

Abdomen hyaline, pale creamy whitish; basal tergites shaded with smoky in the median area; tergites 8-10, and posterior half of 7, with a narrow purplish black middorsal streak. No other markings. Tails white. Genitalia as in fig. 160.

This species, most closely allied to B. prudens (now a synonym of Susperatus prudens), may be distinguished from it by bright yellow of the thorax, the slightly darker fore femur, the black mid-dorsal streak on the apical abdominal tergites, and the slightly longer male forceps. It is smaller than other described species in our fauna.