Philodoria platyphylliella Kobayashi, Johns & Kawahara sp. n.

Figs. 22D, 50I, 51G, 52G, 75D–G, 87G–I.

Philodoria sp. 14; Johns et al. 2018: figs. 1A, 2.

Type locality. Nakula Natural Area Reserve (Maui).

Etymology. The specific epithet, platyphylliella, refers to the species epithet of Dubautia platyphylla, its host plant.

Type material. Holotype ♂, Nakula Nar, Maui Is., 11.viii.2014 (stored), C.A. Johns leg., host: Dubautia platyphylla, 26.vii.2014, CJ363, SK833♂ in BPBM . Paratype ♂, same locality and data as holotype, 10.viii.2014 (stored), CJ358, PHIL0026 (only abdomen) in BPBM. The holotype was mounted as a dry pinned specimen by placing two forewings without mountant under a coverslip. The head, antenna, thorax, and legs of paratype were sacrificed for molecular analysis.

Additional material. 1♀, same locality and data as holotype, 12.viii.2014 (stored), CJ368, PHIL0025 genitalia missing in BPBM .

Diagnosis. The forewing pattern similar to that of P. nigrelloides (Swezey) and P. touchardiella (Swezey), but is differs from them by having a darker brown forewing with a blue to fuscous patch at its apex (Fig. 22D). The male genitalia is similar to that of P. touchardiella, but is distinguished by its rather thick saccus.

Description: Adult (Fig. 22D, 75D–G). Forewing length 3.4, 3.6 mm in holotype. Head bronze; frons white; maxillary palpus pale bronze; labial palpus white basal half, bronze at apex; Antenna bronze, about 1.1–1.2 x length of forewing. Thorax dark brown. Forewing dun to bronze with three oblique white streaks: ds 2 at about 2/5, extends to about middle of wing; a smaller ds 3 at 2/3. a small costal spot at near base; cs 3 from 3/4, extending about 2/3 across wing; apical portion dark orangish brown with a large as of blue scales; a blue to fuscous patch at 4/5; few shiny gray spot at the middle of apical portion; cilia fuscous mixed dark brown scales with three white costal spots (a, b, c) at apex; black bl 1 at terminal cilia. Hindwing and cilia fuscous. Abdomen bronze, white beneath. Legs fuscous.

Male genitalia (Figs. 50I, 51G, 52G) (n=2). Capsule 800 µm. Tegumen 0.9 x length of valva; valva 590 µm long, tapering along costal margin from basal 1/2 to apex (Fig. 50I). Saccus digitiform in ventral view (Fig. 51G). Phallus 500 µm long and straight, slightly widening at phallobase with developed coecum; cornuti in vesica indistinct (Fig. 52G).

Female genitalia Unknown.

Distribution. Maui.

Host plants. Asteraceae: Dubautia platyphylla (A.Gray) D.D. Keck. Dubautia platyphylla is rare and restricted to Maui. We surveyed a small population of this plant species within Nakula Natural Area Reserve, Maui, in July 2014 (Fig. 69C, D). This plant population was located on a steep drainage and was out of reach of ungulates, goat, pig, and deer.

Biology. (Fig. 87G–I). Larvae form an oblong blotch mine (Fig. 87G–I). Pupation occurs in the white cocoon on the adaxial leaf surface (Fig. 87I).