Mayfly Species Parameletus midas (Gray Drakes)

Head of male blackish. Thorax olive brown, shaded with yellowish olive anteriorly on the median line and on the mesothoracic scutellum. Legs olive brown, the fore legs darker than the middle and hind pairs. Wings hyaline, venation dark. A faint trace of brown shading on the fore wing between the subcosta and radius basally; a brown dot at the base above the inner margin, and a faint shading of brown in the stigmatic area. A small brown cloud at the bulla. The entire costal margin may appear shaded with brown, especially in the female. Stigmatic cross veins in the apical portion of the costal space tend to anastomose.

Abdomen brown dorsally, the posterior margins blackish. Sternites duller and paler brown, with faint traces of small lateral dark spots on each. In female, each sternite is narrowly marked with yellowish. Forceps base brown, very slightly concave on the apical margin. Forceps brown, penes dark red-brown. Ventral division of the penes rounded at the apex, extending beyond the tips of the dorsal division; the latter composed of two rather slender curved structures, pointed at the tips, and converging apically (see fig. 128). Tails brown with darker joinings.

Head of female yellowish with a brown band across the median carina, and brown submedian streaks on the vertex and occiput. Thoracic pleura of female with yellow marks and blotches. The entire costal margin may appear shaded with brown, especially in the female.