Pseudohemihyalea Schmidt 2009

Key to species of the Pseudohemihyalea ambigua species-group

1 Forewing posterior cubital vein and anal vein with separate brown striae; forewing with prominent hook-like mark at distal end of discal cell (fig. 3); male forewing length less than 20 mm, female less than 22 mm; uncus of male with basal lobes flattened and raised dorsally, basally with broad, ushaped cleft (fig. 13)................................................................. P. fallaciosa

– Forewing posterior cubital vein and anal vein with confluent, broad brown striae; forewing with hook-like mark at distal end of discal cell small or absent (figs. 1,2,4,5); male and female forewing length variable; uncus of male with basal lobes globose (Figs. 11, 12, 14, 15).................................................... 2

2 Male forewing length greater than 25 mm, female greater than 28 mm; uncus length more than 1.7 mm (Figs. 14, 15); corpus bursae length more than 3 mm and about 3 x diameter of bulla seminalis (fig. 22)............................... 3

– Male forewing length less than 25 mm, female less than 28 mm; uncus length less than 1.7 mm (Figs. 11, 12); corpus bursae length less than 3 mm and about 1-1.5 x diameter of bulla seminalis (Figs. 21, 23).............................. 4

3 Male valve elongate, approximately 3 x as long as wide (fig. 9); vesica with thin, spine-like cornuti (fig. 20), uncus widest at basal fourth (fig. 15); hindwing with distinct pink flush; northern Sierra Madre Occidental, Mexico....................................................................................................... P. sonorosa

– Male valve broad, approximately 2 x as long as wide (fig. 10); vesica with small, stout cornuti (fig. 19), uncus widest at basal third (Fig. 14); hindwing with faint pink flush; Sierra Madre Oriental, Mexico (females unknown)............................................................................................................ P. potosi

4 Male uncus long and narrow in dorsal aspect, averaging 2.4 x longer than wide, with basal cleft narrow (fig. 12); saccular process about as long as wide (fig. 7); lateral margins of female lamella antevaginalis parallel or flaring outward towards caudal margin, with caudal concavity broad, i. e. more than 2 x width of ductus bursae; southern Mexico to Honduras.................................................................................................................. P. syracosia

– Male uncus broad in dorsal aspect, averaging 1.8-2.0 x longer than wide, with basal cleft broad and relatively shallow, i. e. ¼ or less the width of uncus (fig. 11); width of saccular process at base approximately equal to process length (fig. 6); lateral margins of female lamella antevaginalis tapering inwards to caudal margin, with caudal concavity narrower, i. e. less than 2 x width of ductus bursae (fig. 21); western USA south through Sierra Madre Occidental, Mexico................................................................... P. ambigua