FIGS. 19–21 a in Nymphs of the Northeastern Nearctic Species of Neoleptophlebia Kluge, 1997 and Paraleptophlebia Lestage, 1917 (Ephemeroptera: Leptophlebiidae)

FIGS. 19–21 a: mouth- and bodyparts of Paraleptophlebia volitans. 19. close-up of forefemur and tibia, white line and arrow indicate position and length of long, hair-like setae along ventral edge of femur, 19b. lateral view of legs with arrow indicating long, hair-like setae on ventral edge of femur, 20a. right mandible (ventral view), 20b. close-up of outer edge and ventral surface of right mandible, arrow indicates long, hair-like setae, 21a. right maxilla (dorsal view), 21b. close-up segment 1 of maxillary palp, arrow indicates group of several sharp setae on ventral surface.