Mayfly Species Neoleptophlebia mollis (Jenny Spinners)

This is a white-winged, white-legged, white-tailed species with dark brown thorax and brown tipped white abdomen. Head, thorax, and basal segment of the abdomen brown, darker above and beneath, with paler sutures at the sides. All appendages white. Wings white with whitish veins and with scarcely any darkening of the stigmatic area. Costal cross veins almost undiscoverable except in the stigmatic area where they are rather crowded, strongly aslant, sinuous, and sometimes forked. Segments 2 to 7 of the abdomen entirely translucent white, with no markings on either ganglia or spiracles. Segment 8 is pale brown, 9 and 10 are somewhat darker brown. Forceps and tails white. Penes pale brown, separated by a narrow cleft; each tip bears externally a thin, flat, triangular lobe that terminates laterally in a sharp, upcurving thorn-like point (see fig. 133).