Mayfly Species Paraleptophlebia ontario

This is another small clear-winged species of rich red-brown color and bi-colored abdomen. Head, thorax and both ends of abdomen brown. Legs pale brown with only the front femur a little darker. Wings hyaline with the radial vein pale brown, darker at the root. Costal cross veins obsolete, nearly so even in the stigmatic area where they are simple and but little curved.

Middle abdominal segments obscurely paler across the base of the dorsum and on the sides beneath the mid-lateral carina; end segments darker above. Genitalia and tails somewhat brownish at the base. Penes separated by a rather narrowly U-shaped cleft, truncate on the apex in a sinuous line that ends externally in a recurved tooth. Reflexed spurs very short, hardly longer than the depth of the notch, curved and blunt at the tip (see fig. 133).