Lautaroderus malalcahuello Gumovsky, sp. n.

Figs 1–3

Description. FEMALE. Length 3.2 mm. Body green-bronze with violet tint on posterior parts of notauli and on lower face; gaster brownish; legs (including tarsi) and antennae dark metallic (Figs 1–3). Fore wing widely darkened, veins of wings dark brown (Figs 1A‒C).

Head in dorsal view about 2.2× as wide as long; POL nearly 2.0× OOL, and OOL about 2.3× MDO. Head in frontal view (Figs 2B, 3G) about 1.4× as wide as high; toruli with ventral margins situated 1/2 diameter of torulus above virtual line connecting lower margins of eyes (Fig. 2B). Face faintly reticulate, with area above clypeus smooth (Fig. 2C). Eyes with inner margins subparallel (Fig. 2B). Gena evenly curved (Fig. 2C). Malar sulcus complete (Figs 2B‒D). Mouth opening about 1.8× as wide as malar space. Anterior margin of clypeus and labrum both with four setae (Fig. 2C). Antenna (Fig. 2E) with scape about 3.5× as long as wide; pedicel about 2.0× as long as wide; an1 very thin, strongly transverse; an2 1.7× as wide as long, and about 3.0× shorter and 1.5× narrower than F1; F1–F4 about 1.3× as long as wide; club about 2.8× as long as wide and 2.6× as long as F4, with segments separated by sutures and deep constrictions, and terminal spine long, about ¼ length of club.

Mesosoma about 1.5× as long as wide, shallowly reticulate (Fig. 2A). Pronotum in dorsal view (Figs 2A, 3G) short, conical, its collar present as a narrow strip, collum short, evenly sloping (Figs 1B, 3G). Mesoscutum (Fig. 2A) nearly 2.0× as wide as long; mesoscutellum slightly longer than wide and slightly longer than mesoscutum, its surface alutaceous except its extreme margin smoother (Fig. 2A). Axilla with 3 bristles. Mesopleuron with deep femoral depression and straight, sulcate transepimeral sulcus (Figs 3A, C). Metanotum wide, with metascutellum about 0.35× (1/3) as long as mesoscutellum (Figs 1D, E, 2A). Metapleuron subrectangular, coarsely reticulate. Fore wing approximately 2.0× as long as wide, slightly longer than body (Figs 1A–C); subcosta of SMV broken at juncture with parastigma, with 5 dorsal bristles; MV about 1.4× as long as costal cell and about 0.7× wing width; STV with long petiole, drop-shaped stigma, and relatively long uncus; PMV about 1.3× as long as STV; marginal fringe short, about 0.5× as long as STV and about 1.5× as long as width of MV at its widest part. Calcar about as long as width of fore tibia (Fig. 3D); midtibial spur about 2.0× as long as width of mid tibia; hindtibial spur about as long as width of hind tibia (Figs 3C–F). Propodeum (Figs 1D, E) coriaceous-reticulate, its submedian areas elevated, with robust median carina which fades posteriorly and with wide supracoxal flange bearing septae; propodeal callus with 12 setae.

Metasoma as long as mesosoma (Figs 1A–C); petiole transverse, reduced. Gaster in dorsal view about 1.5× as long as wide (Fig. 1C); Gt 1 with slightly elevated anterior areas bearing about 10 sparse setae; posterior margin of tergites straight (Fig. 3B) and with bristles starting from Gt 3 (Fig. 3B); syntergum (Gt 7) with a membranous lobe apically, with cercus short and with 3 setae.

MALE. Unknown.

Biology. Unknown.

Distribution. Chile, Malleco Province.

Material examined. HOLOTYPE ♀ (NHMUK), Chile: Malleco Province, 6 km, E Malalcahuello, 1080 m., xii.1982, A. Newton & M. Thayer (also, ‘aberrant EULOPH[ID]’ with Zdeněk Bouček’s handwriting).

Etymology. The species name is in honor of the collection area, the Malalcahuello national reserve situated in the pre-Andean plain in the La Araucania region of Chile.