Dryinus schoutedeni (Benoit, 1950)

Olmi, Massimo, Copeland, Robert S. & Noort, Simon Van, 2019, Dryinidae of the Afrotropical region (Hymenoptera, Chrysidoidea), Zootaxa 4630 (1), pp. 1-619: 346-347

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Dryinus schoutedeni (Benoit, 1950)


32. Dryinus schoutedeni (Benoit, 1950)  

( Figs 140E, F View FIGURE 140 )

Lestodryinus schoutedeni Benoit 1950b: 224   .

Dryinus schoutedeni (Benoit)   : Olmi 1984: 778; 2006: 43; Azevedo et al. 2010: 892.

Description. ♀. Fully winged; body length 6.7–9.4 mm. Head reddish or reddish-dark, except mandible and clypeus testaceous; antenna black, except scape, pedicel and flagellomeres 6–8 testaceous; prothorax reddish or brown-reddish; rest of mesosoma black; metasoma brown; legs brown-black, except tarsi testaceous. In Madagascar there are two different forms: first form almost totally testaceous-reddish, except petiole black, metasoma brown and occasionally mesothoracic axilla blackish; second form almost totally black, except mandible, clypeus, malar space, anterior region of frons near clypeus, lateral regions of pronotum and posterior collar of pronotum testaceous; both forms with antenna testaceous, except antennomere 3 darkened. Antenna clavate; antennomeres of specimen from Zimbabwe, Chishawasha, in following proportions: 8:6:36:20:17:11:9:9:7:7. Head dull, granulate and slightly reticulate rugose; frontal line complete; occipital carina complete; lateral ocelli not touching occipital carina, situated on virtual straight line joining posterior edges of eyes; POL = OL = OPL; TL much longer than OPL. Pronotum ( Fig. 140E View FIGURE 140 ) dull, granulate, with many keels around disc; pronotum crossed by strong anterior transverse impression and very strong posterior transverse furrow; anterior collar distinct; posterior collar long; pronotal tubercle not reaching tegula. Mesoscutum, mesoscutellum and metanotum dull, granulate, usually with numerous slight longitudinal keels (in specimen from Madagascar, 15°55’S 45°57’E, MG-38-20, mesoscutum very slightly granulate and without longitudinal keels; in specimen from Madagascar, 16°08’S 45°42’E, mesoscutum completely unsculptured). Notauli incomplete, approximately reaching 0.65 × length of mesoscutum. Metapectal-propodeal disc reticulate rugose, about 3 × as long as propodeal declivity; propodeal declivity reticulate rugose, with two longitudinal keels. Forewing with two dark transverse bands; distal part of 2r-rs&Rs vein about twice as long as proximal part. Protarsomere 1 about as long as 4; protarsomere 3 produced into hook. Enlarged claw ( Fig. 140F View FIGURE 140 ) with one large subdistal tooth and one row of 18 lamellae. Protarsomere 5 ( Fig. 140F View FIGURE 140 ) with two rows of about 34 lamellae; apex with about 13 lamellae. Tibial spurs 1/1/2.

♂. Unknown.

Material examined. Type: ♀ holotype: DEMOCRATIC REPUBLIC OF THE CONGO: Low Congo, Banana , 6.VIII.1920   , H. Schouteden leg. ( MRAC). Other material: MADAGASCAR: Antananarivo, Tsimbazaza Park , 1– 6.XI.1984   , YPT, Robert W. Brooks leg. ( NAMUK); Mahajanga, Analamanitra Forest , 14 km NE Misinjo, 15°55’S 45°57’E, 65 ft., 12–19.II.2008 GoogleMaps   , MT, dense dry forest, M. Irwin, R. Harin’Hala leg., MG-38-18, 1♀ ( CAS); same locality label, 16°08’S 45°42’E, 26.II–4.III.2008 GoogleMaps   , MG-38-20, 1♀ ( MOLC); Toamasina, near Vavatène , Manakam- bahiny, in forest, II.1995, 1   ♀ ( FSAE); Toamasina, 25 km W of Morarano-Chrome , in forest, 10–20.IV.1992   , 1♀ ( FSAE); Toamasina, Alaotra Lake , 3.XII.1990   , 1♀ ( AMNH); Toamasina, Garden of Alaotra Station , I.1991, 1   ♀ ( FSAE). SOUTH AFRICA: Gauteng, Pretoria, Faerie Glen , 25°46’S 28°17’E, 21.II.1995 GoogleMaps   , 1♀ ( CAS). ZIMBABWE: Harare, Chishawasha , V.1979   , A. Watsham leg., 1♀ ( NHMUK)   .

Hosts. Unknown.

Distribution. Democratic Republic of the Congo, Madagascar, South Africa, Zimbabwe.

Remarks. The ♀ population from Madagascar is apparently characterized by a colour different from that of other African populations. The specimens from continental Africa, have the body partly testaceous-reddish (head and prothorax) and partly black, whereas the Madagascar population has the body totally testaceous-reddish or totally black. Only one totally black specimen is known (from Manakambahiny), whereas five testaceous-reddish specimens are known from Tsimbazaza Park, Alaotra Lake, 25 km W of Morarano-Chrome and Alaotra Station, and from 15°55’S 45°57’E. The small number of known specimens means that we need to postpone assessment of this population. These specimens from Madagascar have a morphology similar to that of the continental population; the only differences are in the colour. Possibly they are a different species. It is prudent to wait for further specimens, before reaching a decision on the status of this population. The testaceous-reddish specimens from Madagascar are 8.1 mm long, whereas the black specimen is 6.7 mm long. The main characters may be summarized as follows: antennomeres in following proportions: 12:6:53:30:23:16:12:10.5:8.5:10; POL = 2.5; OL = 2; OOL = 12; OPL = 2; TL = 6; distal part of 2r-rs&Rs vein longer than proximal part (19:10); Protarsomeres in following proportions: 31:4:9:27:41; enlarged claw with one large subapical tooth and one row of 15 lamellae; protarsomere 5 with two rows of approximately 41 lamellae; apex with at least 20 lamellae.


Musée Royal de l’Afrique Centrale


California Academy of Sciences


American Museum of Natural History


Natural History Museum, London






Dryinus schoutedeni (Benoit, 1950)

Olmi, Massimo, Copeland, Robert S. & Noort, Simon Van 2019

Dryinus schoutedeni

Azevedo, C. O. & Madl, M. & Olmi, M. 2010: 892
Olmi, M. 1984: 778

Lestodryinus schoutedeni

Benoit, P. L. G. 1950: 224