Dryinus, Latreille, 1804

Ødegaard, Frode, Rakhshani, Ehsan & Olmi, Massimo, 2023, Association of the opposite sexes of Dryinus niger Kieffer, with notes on males of the other Western Palaearctic species of the same genus (Hymenoptera, Dryinidae), Zootaxa 5278 (1), pp. 155-162 : 160

Following the above description of the male of D. niger, the key to the males of the Western Palaearctic species of Dryinus published by Olmi (1999) and modified by Derafshan et al. (2021), can be changed by replacing couplet 1 as follows:

1. Antenna very slender, antennomere 3 at least 6.5 × as long as broad ( Figs 2C , 4A , 5A ).............................. 2

- Antenna less slender, antennomere 3 less than 6.0 × as long as broad ( Figs 6 , 7D ).................................. 3

2. Mesoscutum completely granulate, not reticulate rugose ( Figs 4B, C ); forewing with Radial sector (Rs) of 2r-rs&Rs vein much longer than second radial cross (2r-rs) (about 20:10) ( Fig. 4C )................................. D. collaris (Linnaeus)

- Mesoscutum completely reticulate rugose or granulate and reticulate rugose ( Figs 2A , 5B, D ); forewing with Radial sector (Rs) of 2r-rs&Rs vein slightly longer than second radial cross (2r-rs) (about 10:9) ( Figs 1A , 2B ) or slightly shorter than second radial cross (2r-rs) (about 8:9) ( Fig. 5D )....................................................................... 2a

2a. Head black, except mandible testaceous and clypeus brown ( Fig. 1B )................................ D. niger Kieffer

- Head testaceous, except occiput and part of vertex black ( Fig. 5C )................... D. tamaricicola Rakhshani & Olmi

Figures

FIGURE 1. Dryinus niger, ♁ from Norway, Skansen. A, habitus in dorsal view; B, head in dorsal view; C, habitus in lateral view. Scale bar: 1.2 mm for A; 0.3 mm for B; 0.8 mm for C.

FIGURE 2. Dryinus niger, ♁ from Norway, Skansen. A, mesosoma in dorsal view; B, left forewing; C, antennomere 3. Scale bar: 0.3 mm for A; 0.5 mm for B; 0.1 mm for C.

FIGURE 4. Dryinus collaris, ♁ from Germany, Tübingen.A, antennomere 3; B, mesosoma in dorsal view; C, habitus in dorsal view. Scale bar: 0.1 mm for A; 0.5 mm for B; 2.1 mm for C.

FIGURE 5. Dryinus tamaricicola, ♁ from Iran, Zabol. A, antennomere 3; B, mesosoma in dorsal view; C, head in frontal view; D, body in dorsal view. Scale bar: 0.1 mm for A; 0.4 mm for B; 0.3 mm for C; 0.9 mm for D.

FIGURE 6. Antennomere 3. A, Dryinus corsicus, ♁ from France, Saint-Gély-du-Fesc; B, Dryinus sanderi, ♁ from Bulgaria, Novo Selo; C, Dryinus tarraconensis, ♁ from Italy, Villastellone. Scale bar: 0.4 mm for A; 0.2 mm for B; 0.1 mm for C.

FIGURE 7. Dryinus sp. erroneously identified as D. niger by Currado & Olmi (1979), ♁ from Italy, Genova. A, habitus in dorsal view; B, habitus in lateral view; C, head in frontal view; D, antennomere 3. Scale bar: 1.6 mm for A; 1.2 mm for B; 1.3 mm for C; 0.1 mm for D.