Key to the species of Orchidophilus

1 Elytra without yellow spots.........................................................................................................................2

- Elytra with yellow spots, either formed by glabrous integument or by imbricate scales............................5

2 Total length 2.7–6.0 mm; metepisternum broader, smaller specimens [usually from greenhouses] with two irregular rows of punctures at narrowest part, larger specimens with three rows; pronotal punctures usually smaller and more widely spaced (Fig. 2).............................................................................................3

- Total length 2.8–3.8 mm; metepisternum narrower, smaller specimens with single row of punctures at narrowest part, larger specimens with indistinct second row; pronotal punctures coarse and crowded (Fig. 3) 4

3 Male with conspicuous ventral projection in distal one-third of middle tibia, projection indistinct in small specimens; male with distal margin of ventrite 5 curved gently (Fig. 6); elytral apices frequently with striae 9 and 10 deeply punctate and amalgamated with interstria to noticeable depression; total length 2.7– 6.0 mm .............................................................................................................. O. aterrimus (Waterhouse)

- Male without ventral projection in distal one-third of middle tibia; male with distal margin of ventrite 5 more steeply projecting medially (Fig. 7); elytral apices with outer striae and interstriae less modified; total length 3.1–4.8 mm ............................................................................................ O. epidendri (Murray)

4 Male with posterior margin of ventrite 5 with square median process (Fig. 8), submentum with denticle. ........................................................................................................................... O. peregrinator Buchanan

- Male with posterior margin of ventrite 5 bisinuate (Fig. 7), submentum without denticle O. ran Morimoto

5 Elytral spots formed by dense clusters of broad, light yellow scales in basal one-fourth of interstriae 3, 5, 7 and 9 (Fig. 4); interstriae with single, widely spaced scales; rostrum evenly curved O. eburifer (Pascoe)

- Elytral spots formed by unpigmented glabrous integument at base of interstriae 5–8 and near declivity at interstriae 3–8 (Fig. 5); interstriae with inconspicuous hairs; rostrum strongly curved at base ................... ....................................................................................................................................... O. insidiosus sp. n.