Enizemum ornatum

Enizemum ornatum (Gravenhorst 1829, Bassus)

Bassus deplanatum Gravenhorst 1829

Bassus carinulatum Ruthe 1859

Bassus frenator Desvignes 1862

Enizemum neomexicanum Brues 1908

Homocidus sumptuosum Schmiedeknecht 1926

Diagnosis. Fore wing length 5.3–7.2 mm in females, 4.8–6 mm in males. Antenna in females with 20–22 flagellomeres, light orange, at least ventrally on basal flagellomeres but usually on most of the antenna, with multiporous plate sensilla also present on ventral surface of the apical flagellomeres, although less densely distributed than dorsally; in males with 21–22 flagellomeres and broad tyloids on flagellomeres 7 to 13/14. Mesoscutum and mesopleuron with punctures small and very dense, interspaces finely coriaceous. Propodeum with pleural and lateral longitudinal carinae present, median longitudinal and transverse carinae present only as traces. First tergite with median dorsal carinae converging only over basal half, forming a distinct angle and subparallel on apical half of the tergite (Fig. 14 E). Second tergite with basal carinae strong.

Colouration of females. Antenna bright orange, apically often somewhat dark. Head and mesosoma black, face without yellow central face patch, clypeus and mouthparts usually orange, yellow-marked sometimes on hind corner of pronotum and tegula, sometimes with small shoulder mark and upper mesepimeron, subtegular ridge usually black but rarely yellow; scutellum sometimes with yellow tip. Legs and coxae orange; femora orange; hind tibia with a white base, remainder dark, hind tarsus dark. Metasoma black.

Colouration of males. As in females but with yellow ventrally on scape and pedicel, entire face, large part of hind corner of pronotum, subtegular ridge, propleuron, epicnemium, large part of mesosternum and often mesopleuron ventrally. Fore and mid coxae and legs often largely yellow. Hind tibia often with basal white marking extended to about half the length of the tibia.

Material examined. New for Turkey: Bolu, VI.1999. 1♀, at NMBE; Isparta, Atabey, 1250m, leg. F. Gürbüz, 26.VI.2002. 1♀, at SDU.

Germany (4), Hungary (13), Iceland (1), Russia (1), Sweden (3), Switzerland (70), United Kingdom (20), USA (3).

Distribution. Holarctic and Oriental.

Figures. Fore wing (Fig. 12 D), antenna ♂ (Fig. 13 I), hind tibia ♀ (Fig. 14 B), hind tibia ♂ (14C), first tergite (Fig. 14 E), clypeus (Fig. 14 I), habitus (Fig. 30 B), male terminal sclerites (Fig. 37 E).

Notes. European female specimens all have bright orange antennae, while North American specimens have brown antennae. The few North American specimens examined are otherwise not different from the European populations, and so probably do not represents a distinct species.