Key to the known species of the “ browni group”

1- Androconial scent pads light grey, appearing white or silver under stereo-microscope with direct light... 2

- Androconial scent pads dark grey or black, appearing grey or black under stereo-microscope with direct light.............................................................................................................................................................. 3

2- Dorsal surface royal blue; black margin approximately 1 mm in width on both wings; scent pad small (approximately 1/5 length of discal cell) and slightly square; valvae ventral keel pointed .......................... ........................................................................................................... P. regala (Le Crom & Johnson, 1997)

- Dorsal surface iridescent purple; black margin greater than 1mm in width on both wings; scent pad large and ovate (approximately 1/3 length discal cell), valvae ventral keel rounded ... P. browni (Johnson, 1992)

3- VFW medial band strongly angled at vein M3; VHW discal margin made of bulbous undulations; discal cell apex marked by a black spot on forewing; DHW with a small oval patch of brilliant pale blue scales in outer half of tornus ........................................................................... P. caeruleonota Hall & Willmott, 2005

- VFW medial band straight or slightly curved not angled at vein M3; discal cell apex without a black spot or reduced black spot; VFW medial band or VHW discal margin without bulbous undulation................. 4

4- DFW, DHW iridescent or pale purple; androconial brand dark grey or black, oval or rectangular in shape ..................................................................................................................................................................... 5

- DFW, DHW iridescent sky blue; androconial brand black (dark grey under stereo-microscope with direct light) and somewhat rectangular in shape ................................................................................................... 7

5- Submarginal band on both wings is a continuous line in ventral surfaces; FW medial and submarginal band always reaches vein 2A; valvae ventral keel pointed. ................................ P. v i t t a t a (Johnson, 1992)

- Submarginal band on both wings with a pattern of separate and individual lines or spots ........................ 6

6- Distance between medial and submarginal band on VFW approximately 2.5 times distance between submarginal band and wing outer margin (measured at vein CuA2); ventral surface both wings red brown in both wings ......................................................................................................... P. purpurea (Johnson, 1992)

- Distance between medial and submarginal band on VFW approximately 1.5 times distance between submarginal band and wing outer margin (measured at vein CuA2) ......................... P. saraha (Johnson, 1992)

7- VHW discal margin appears as brown medial band, perceptibly curved towards wing basal area .............. ......................................................................................................................... P. magnifica (Johnson, 1992)

- VHW discal margin appears as an irregular and zig-zag band; scattered with white scales between submarginal and medial band in both wings ................................................................................ P. cuiva n. sp.