Key to female genitalia
(Females of P. limahuliensis sp. n., P. napaliensis sp. n., P. nigrella, P. pipturiana, P. pittosporella, P. platyphylliella sp. n., P. sp. 2, 3, 7, and P. sp. B are unknown. The female of P. micropetala is known except that its corpus bursae and ductus bursae are missing)
1 Signa present with spines............................................................................... 2
- Signa absent; corpus bursae smooth or with some lines consisting of wrinkles running longitudinally, some sclerotized..... 8
2 Lamella antevaginalis large sclerotized plate................................................................ 3
- Lamella antevaginalis weakly sclerotized; antrum cup-shaped with a slender pair of lateral lobes...................... 4
3 Spines on signa large, triangular; lamella antevaginalis trapezoid (Fig. 56I, J).......................... P. molokaiensis
- Spines on signa short, linear; lamella antevaginalis trapezoid, rather narrowing at posterior end (Fig. 56H)......... P. sp. A
- Spines on signa large claw-shaped (Fig. 56G)................................................... P. lysimachiella
- Spines on signa oblong and podlike (Fig. 40G, H, 56K, L)........................ P. basalis, P. splendida, P. lama sp. n.
4 End of ductus bursae membranous........................................................................ 5
- End of ductus bursae sclerotized, bifurcated................................................................ 7
5 Signa small and narrow with minute spines; lateral lobes of antrum short (Fig. 56F)............................ P. kolea
- Signa spiny pyriform with minute spines (Fig. 57F; Zimmerman 1978a: fig. 480).......... P. haelaauensis sp. n., P. spilota
- Signa rather broad, sinouous, linear; lateral lobes long and slender (Fig. 57G).............................. P. floscula
- Signa with a pair of large spines.......................................................................... 6
6 Spines long and slender (Fig. 56A, B)........................................................... P. succedanea
- Spines on signa small and rounded (Fig. 56D, E)................................................ P. kauaulaensis
- Spines on signa blunt (Fig. 56C)............................................................ P. auromagnifica
7 Signa small and podlike with minute spines (Fig. 59L)................................................ P. hauicola
- Signa two short lines with minute spines (Figs. 58H, 59J).............................. P. hibiscella, P. touchardiella
- Signa very small with a pair of slender minute spines (Fig. 59K)................................... P. keaensis sp. n.
- Signum very small with a minute spine (Fig. 60A–C)........................................... P. marginestrigata
8 Ductus bursae short, about 300 µm in length; lamella antevaginalis inflexed on posterior margin (Fig. 57A–E)................................................................................. P. costalis, P. pipturiella P. pipturicola
- Ductus bursae short, about 300 µm in length; lamella antevaginalis semicircular (Fig. 58A)................ P. wilkesiella
- Ductus bursae long, 400~µm in length (Figs. 58B–G, I–M, 59A–I, 60D–F)..................................................................................... P. alakaiensis sp. n., P. dubauticola, P. dubautiella, P. epibathra, P. obamaorum sp. n., P. hesperomanniella sp. n., P. funkae sp. n., P. keahii sp. n., P. knudseniiella sp. n., P. lipochaetaella, P. naenaeiella, P. neraudicola, P. nigrelloides, P. opuhe sp. n., P. sciallactis, P. ureraella, P. urerana, P. sp. 1 ¶
¶ Females of the 18 species have the following similar characters: lamella antevaginalis weakly sclerotized, widening toward anterior margin of A7; Ductus bursae posterior extremity widening and membranous, and middle part weakly sclerotized, round and flat; terminus of ductus bursae tubular, biforked. Corpus bursae pyriform or oblong; signa absent; paired rows consisting of wrinkles running longitudinally. See also key to adults and male genitalia for species identification.