Dryinus irwini, Olmi, 2007

Olmi, Massimo, 2007, New species of Afrotropical Dryinidae (Hymenoptera: Chrysidoidea), with description of a new genus and a new subfamily, African Invertebrates 48 (2), pp. 199-232 : 215

Dryinus irwini sp. n.

Fig. 14

Etymology: This species is named after Dr Michael E. Irwin.

Description:

Female.

Fully winged; length 4.06 mm. Head testaceous-reddish, with anterior third of face and clypeus testaceous; antennae testaceous reddish; prothorax testaceous-reddish; rest of mesosoma black; gaster and legs testaceous-reddish. Antennae clavate; antennal segments in following proportions:6:6:30:14:12:9:8:7:6:8. Head dull, excavated, granulated, with face sculptured by numerous longitudinal striae; frontal line complete; occipital carina complete; occiput excavated; POL = 2.5; OL = 2.5; OOL = 11; OPL = 1; TL = 5; greatest diameter of posterior ocelli = 2. Pronotum dull, granulated, crossed by slight anterior transverse impression and strong posterior transverse furrow; disc humped; posterior collar short; pronotal tubercles not reaching tegulae. Scutum, scutellum and metanotum hairy, dull, granulated and reticulate rugose. Notauli absent. Propodeum dull, reticulate rugose, without transverse or longitudinal keels. Forewing hyaline, with 2 distinct dark transverse bands; distal part of stigmal vein longer than proximal part (16:5). Fore tarsal segments in following proportions: 18:2:6:14:23. Enlarged claw ( Fig. 14 ) with large subdistal tooth and row of 13 lamellae. Segment 5 of front tarsus ( Fig. 14 ) with 2 rows of approximately 28 lamellae; distal apex of segment 5 with group of about 18 lamellae. Tibial spurs 1, 1, 2.

Male. Unknown.

Holotype: ^“ SOUTH AFRICA: Eastern Cape, 37 km NW Willowmore, Grootrivierberg Range , 33 ° 11.46'S: 24 ° 09.51'E, alt. 700 m, 19–24.xi.1999, Malaise trap, M.E. Irwin et al. ”; [red] “ Dryinus irwini sp. n. M. Olmi det. 2006, ^” (CNCI).

Hosts: Unknown.

Comparison: D. irwini belongs to D. ugandanus group. The female of this new species is similar to that of D. pseudoafer Olmi, 1993 . The main differences are the following: in D. pseudoafer , head completely granulated, scutellum granulated, forewing with 2 slight dark spots; in D. irwini , head granulated, with face sculptured by numerous longitudinal striae, scutellum reticulate rugose, forewing with two distinct dark transverse bands.

Figures

Figs 13–15. (13) Thaumatodryinus sokokensis sp. n., male holotype, genitalia, scale bar = 0.06 mm; (14) Dryinus irwini sp. n., female holotype, chela, scale bar = 0.06 mm; (15) Adryinus mostovskii sp. n., female holotype, chela, scale bar = 0.08 mm.