Xylothrips, Lesne, 1901

Liu, Lan-Yu, 2021, A review of the powderpost beetle genera Xylothrips Lesne, 1901 and Calophagus Lesne, 1902 (Coleoptera: Bostrichidae: Bostrichinae: Xyloperthini), European Journal of Taxonomy 746 (1), pp. 130-147 : 144

Key to species of Xylothrips and Calophagus

1. Each antennomere of antennal club with a band of golden hairs on both sides of each face; pronotum without lateral carina; punctures on elytra very fine and sparse; three pairs of marginal tubercles of declivity very reduced ( Figs 1A–B , 4 ) ................ Calophagus pekinensis Lesne, 1902

– Antennal club matt without sensory impression or hair bands; pronotum with ridge-like lateral carina; punctures on elytra deeper and denser; three pairs of marginal tubercles of declivity well developed ( Figs 1C–F , 2–3 )...............................................................................................................2

2. Posterolateral sides of pronotum shining, glabrous without punctures; lateral callus converging into lateral margin of declivity; round tubercles on apical sutural angle of declivity. Male: frons without erect bristles in the middle or only with some bristles arranged in an arc ............................................ ......................................................................................................... Xylothrips flavipes ( Illiger, 1801)

– Posterolateral sides of pronotum with sparse to moderately dense punctures; lateral callus not converging into lateral margin of declivity; apical suture angle of declivity without tubercle. Male: with frontal crown formed by short but dense bristles ....... Xylothrips religiosus ( Boisduval, 1835)

Figures

Fig. 1. A–B. Calophagus pekinensis Lesne, 1902, ♀ (SNSD). A. Anterolateral view showing the antennae, with two strips of golden hairs on sides. B. Lateral view of head and pronotum showing absence of lateral carina on pronotum. C–D. Xylothrips flavipes (Illiger, 1801), ♂ (LYL). C. Frontal view showing the antennae, matt without sensory areas. D. Lateral view of head and pronotum showing clear lateral carina on pronotum. E–F. Xylothrips religiosus (Boisduval, 1835), ♂ (LYL). E. Frontal view showing the antennae, matt without sensory areas. F. Lateral view of head and pronotum showing clear lateral carina on pronotum. Scale bar = 1 mm.

Fig. 4. Calophagus pekinensis Lesne, 1902, ♀ (SNSD). A. Frontal view. B. Dorsal view. C. Declivity. D. Lateral view of declivity. E. Ventral view. Scale bars = 1 mm (upper scale for B, E; lower scale for A, C–D).

Fig. 2. Xylothrips flavipes (Illiger, 1801), ♀ (LYL). A. Frontal view. B. Lateral view of declivity. C. Declivity. D. Dorsal view. E. Ventral view. Scale bars = 1 mm (upper scale for A–C; lower scale for D–E).

Fig 3. Xylothrips religiosus (Boisduval, 1835), ♀ (LYL). A. Frontal view. B. Dorsal view. C. Declivity. D. Lateral view of declivity. E. Lateral view. Scale bars = 1 mm (upper scale for B, E; lower scale for A, C–D).