S. Mahunka szerk.: Folia Entomologica Hungarica 58. (Budapest, 1997)

tween the 2 lateral keels strongly produced backwards, and scape is blackened with pale tip, cf. Nixon (1957). In the absence of a furrow between the posterior margin of pronotum and middle lobe of mesoscutum, and in shape of metasoma (Fig. 14), Z. caligula is most similar to Z. nigra (Thomson, 1858), but apart from lacking keel on T8, nigra has brighter coloured and less slender antenna than caligula. Z. caligula has extensive punctuation on T2 (Fig. 14), in this respect similar to Z. groenlandica Buhl, 1995, but apart from different structure of T8, groenlandica has petiole distinctly transverse, and it is brighter coloured than caligula, cf. Buhl (1995). [Male. A male, perhaps belonging to this species, has A1-A3 as in nigra, cf. Nixon (1957), but hairs of A1-A2 are shorter, and emargination of A3 is somewhat deeper than in nigra.] Holotype female: Norway (EIS 97), NTI, Mosvik, Kilen 25. VII-14. VIII. 1994, Malaise trap (NINA leg.). Caught at station 38 in the area with fine grained fragmentation, cf. Tommeräs and Breistein (1995). Paratypes (2 females): Same data as holotype but caught at station 5 in the control area, 1 female; same locality 9. VI—

1. VII. 1994, Malaise trap (NINA leg.), caught at station 19 in the control area, 1 female. Non-type: Same data as holotype but caught at station 28 in the area with coarse grained fragmentation, 1 male. One female paratype (st. 19) is deposited in the HNHM. This species, the larvae of which cruelly devour their dipterous host from the inside while it is still alive, is named after an almost as cruel Roman emperor. Figs 15-16. Synacra incompleta sp. n. holotype female. 15: head from in front; 16: antenna (scale bar

=0.25 mm)