Mayfly Species Neoleptophlebia heteronea (Blue Quills)

This is a blackish species with brown-and-white ringed abdomen. The top of head and thorax are rich reddish brown, the sides duller. The fore legs are brown, with paler tarsi and the other legs are wholly pale. The wings are whitish with cross veins absent from most of the costal space, with only a few irregular ones in the stigmatic region. The basal segment of the abdomen and the three apical ones are brown. The middle segments are paler, whitish at the base with the rings broader on segments 4 and 5 and disappearing on 7, and the black spiracles have a broken line connecting them. Basal segment of the forceps rather broad, then nearly parallel-sided to the middle, then strongly tapering; the 3rd segment is nearly as long as the 2nd but much more slender. The penes are separated by a V-shaped notch. The sperm ducts terminate in a projecting tube that is longer than the spines at its outer side, and that has its outer cavinate margin revolute (see fig. 134).