112 ENTOMOLOGISCHE BERICHTEN, DEEL 45, 1. VIII. 1985

New species of for the fauna of the Netherlands (: )

by

PIERRE THOMAS Rijksmuseum van Natuurlijke Historie, Leiden

ABSTRACT. — Five species of Tenthredinidae are added to the checklist of the Dutch fau¬ na, viz. Tenthredo trabeata Klug, Dolerus taeniatus Zaddach, Pareophora pruni (Linnaeus), Nematusprinceps Zaddach and Pachynematus extensicornis (Norton).

Since the publication of Van Ooststroom’s (1976) checklist of the Dutch species of Symphyta one species has been deleted and four have been added to this list. Van Ooststroom (1979) withdrew Allantus basalis (Klug). Liston (1981) recorded Profenusa thomsoni (Konow) for the first time and Mol (1983) recorded Loderus pratorum (Fallén), Empria baltica Conde and Macrophya alboannulata Costa as new.

Sorting out material of the collection of the Rijksmuseum van Natuurlijke Historie at Lei¬ den, and of the collection of Van Aartsen resulted in five new species for the Netherlands. Now this family is known to be represented by 345 species in the Dutch fauna, and several more can be expected.

Tenthredo trabeata Klug, 1818

Ruurlo (prov. of Overijssel); 23. VI.1979; 1 9,1 6. Leg. B. van Aartsen. Rattink (1966) revised the Dutch species of the genus Tenthredo Linnaeus. In his key this species keys out at 11B: T. atra Linnaeus, but it is distinguished from that species by the yellow marking of the upper corners of the pronotum and its legs being partly lined with yellow. The nearest known locality of T. trabeata Klug is Heiderscheid in Luxemburg, recorded by Pasteels (1957). Otherwise this species is known from mountainous areas in France, Switzer¬ land, Austria and Roumania. Its occurrence in the Netherlands is surprising. Larvae and their foodplants are unknown.

Dolerus taeniatus Zaddach, 1859

Biesbosch (prov. of Noord-Brabant); 19. V. 1966; 1 6. Leg. B. van Aartsen. Island of Ameland (prov. of Friesland), 2 km E of Ballum, alongside the road to Nes; 24.VI. 1970; 1

Pareophora pruni (Linnaeus, 1758)

Didam (prov. of Gelderland); 31. V. 1984; 1 9 . Leg. B. van Aartsen. Rouveen (prov. of Overijssel); 15.VII.1984; 1 â. Leg. B. van Aartsen. When the genus Pareophora Konow is treated in the sense of Zombori (1982), this is the only species belonging to it which occurs in Western Europe. Specimens measure approximately 5 mm, genae are as long as a pedicel, stub of vein 3A in forewing is upturned at apex, claws are simple without a basal tooth or lobe, abdomen is orange with first tergite black. The larvae live on the underside of leaves of Prunus spinosa L. and feed on the parenchyma. They hibernate in a cocoon in the upper layers of the soil and are on the wing from about March. According to Lorenz & Kraus (1957) there is one generation a year. Obviously this species is rare in the whole of Europe.

Nematus princeps Zaddach, 1876

Dwingelo (prov. of Drenthe), in a disturbed pasture in the midst of mixed forest dominated by Quercus spp., Pinus sylvestris L., Amelanchier lamarckii Schroeder and Sorbus aucuparia L.; 9.VI.1984; 1 9 . Leg. W. van Meerendonk. This species, recognizable by its red girdled black abdomen and dull mesopleurae, is our largest species of the genus Nematus Jurine. It is known from Germany, Finland and Switzer¬ land. Wolf (1967) mentioned it from Chaudfontaine, Belgium. The larvae and their foodplants are unknown. The species is known to be very rare.

Pachynematus extensicornis (Norton, 1861)

Syn.: P. truncatus Benson, 1958 Broek in Waterland, c. 6 km NE of Amsterdam (prov. of Noord-Holland), near ditch of the Ijsselmeer; 5.VI. 1984; 1 6. Leg. M. J. Delfos. Zunderdorp, c. 3 km NE of Amsterdam (prov. of Noord-Holland), near ’t Nopeind; 17.VII.1984; 1 6. Leg. M. J. Delfos. Hellén (1974) and Lindqvist (1976) utterly disagree in their opinions about the status of this as well as of some related species of the genus Pachynematus Konow. Their dispute demon¬ strates the need of revision of this large genus. For the time being the opinion of Muche (1974) is accepted; in this view this species has circumboreal distribution. The genus Pachynematus is relatively ignored in the Netherlands, as most are, by the present collectors. Addenda to the list of Dutch species belonging to the Nematinae therefore are expected to occur repeatedly in the future. Probably the species at issue is not uncommon in the Netherlands. The larvae live on Gramineae.

Acknowledgements

The author wishes to thank the following persons for providing valuable material for his study of the Tenthredinidae of the Netherlands: B. van Aartsen (’t Harde), M. J. Deltos (Lei¬ den) and W. van Meerendonk (Leiden), and dr. C. van Achterberg for critically reading the text. 114 ENTOMOLOGISCHE BERICHTEN, DEEL 45, 1. VIII.1985

REFERENCES

Benson, R. B., 1952 & 1958. Hymenoptera Symphyta. — Handbk Ident. Br. 6 (2), b & c: 51-252. Brischke, C. G. A. & G. Zaddach, 1876. Beobachtungen über die Arten der Blatt- und Holzwespen. —Sehr, phys.-oekon. Ges. Koenigsb. 16 [1875]: 23-89, Tafel I-III. Hellén, W., 1974. Die Nematinen Finnlands III (Hymenoptera, Tenthredinidae). Gattung Pachynematus Konow. —Notul. ent. 56: 15-20. Klug, F., 1818. Die Blattwespen nach ihren Arten und Gattungen zusammengestellt. — Mag. Ges. naturf. Fr. Berlin 8 [1814]: 179-219. Lindqvist, E., 1976. Bemerkungen über einige Pachynematus-Arten (Hymenoptera, Tenthre¬ dinidae). — Notul. ent. 56: 15-20. Liston, A. D., 1981. Profenusa thomsoni (Konow) in the Netherlands (Hymenoptera, Tenthre¬ dinidae). — Ent. Ber., Amst. 41: 65-66. Lorenz, H. & M. Kraus, 1957. Die Larvalsystematik der Blattwespen (Tenthredinoidea und Megalodontoidea): 1-339, Akademie-Verlag, Berlin. Mol, A. W., 1983. Drie bladwespen nieuw voor de Nederlandse fauna (Hymenoptera: Tenthredinidae). — Ent. Ber., Amst. 43: 145-148. Muche, W. H., 1966. Die Dolerini Ostsachsens (Hymenoptera, Tenthredinidae). — Faun. Abh. st. Mus. Tierk. Dresden 7 (26): 283-284. -, 1969. Die Blattwespen Deutschlands II. Selandriinae (Hymenoptera). — Ent. Abh. Mus. Tierk. Dresden 36, Suppl. 2: 61-96. -, 1974. Die Nematinengattungen Pristiphora Latreille, Pachynematus Konow und Ne- matus Panzer (Hym., Tenthredinidae). — Dt. ent. Z. N. F. 21: 69-93. Norton, E., 1861. Catalogue of several genera of the Tenthredinidae in the United States. — Proc. Boston. Soc. nat. Hist. 8: 150-161. Ooststroom, S. J. van, 1976. De Nederlandse Symphyta (Halm-, Hout- en Bladwespen). Naamlijst. — Wet. Meded. K. ned. natuurh. Veren. 114: 1-24. -, 1979. Voor Nederland nieuwe en minder algemene bladwespen (Hym., Symphyta). (Mededelingen over Symphyta no. 9.) — Ent. Ber., Amst. 39: 97-99. Pasteels, J., 1957. Faune entomologique du Grand-Duché de Luxembourg VIII. Hyménoptères Symphytes. —Archs Inst. gr.-duc. Luxemb. N. S. 24: 71-78. Rattink, H., 1966. Het geslacht Tenthredo Linné, 1746 (Hym., Tenthr.) in Nederland. — Wet. Meded. K. ned. natuurh. Veren. 62: 1-40. Wolf, M. F., 1967. Hyménoptères Symphytes nouveaux pour la faune Belge. — Bull. Annls Soc. r. ent. Belg. 103: 333-335. Zombori, L., 1981. The european genera of Selandriinae and Dolerinae (Hymenoptera: Sym¬ phyta, Tenthredinidae). —Acta zool. hung. 27: 443-450. -, 1982. The european genera of Blennocampinae (Hymenoptera: Symphyta, Tenthre¬ dinidae).— Acta zool. hung. 28: 183-192.

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