Orchidophilus

Prena, Jens, 2008, A synopsis of the orchid weevil genus Orchidophilus Buchanan (Curculionidae, Baridinae), with taxonomic rectifications and description of one new species, Zootaxa 1783, pp. 18-30 : 21

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.

Figures

FIGURES 2 – 5. Habitus of Orchidophilus species, dorsal and lateral aspects. 2, O. aterrimus; 3, O. ran; 4, O. eburifer; 5, O. insidiosus. Scale bar 1 mm.

FIGURES 6 – 9. Form of distal ventrites of Orchidophilus species. 6, O. aterrimus, large male; 7, O. epidendri, male; 8, O. peregrinator, male; 9, O. aterrimus, O. epidendri, O. peregrinator, O. ran, female. Schematic.