Dimophora biquadra, Seraina Klopfstein, 2016

Seraina Klopfstein, 2016, Nine new species of Dimophora from Australia (Hymenoptera: Ichneumonidae): new insights on the distribution of a poorly known genus of parasitoid wasps, Austral Entomology 55, pp. 185-207 : 87-89

Dimophora biquadra sp. n.

http://zoobank.org/urn:lsid:zoobank.org:act:105FF229-8202- 4FB4-B97E-4828BD9C2491

Figure 2

Etymology

The name refers to the two quadratic marks laterally on the lower face ( Fig. 2 b).

Diagnosis

(Male unknown). Forewing length 3.35–3.5 (holotype: 3.5) mm. Antenna with 30–31 (30) flagellomeres. Head between eye and antennal base flat, without protrusion. Ocelli of female slightly enlarged, distance of hind ocellus to compound eye about 1.25 times diameter of ocellus. Mesoscutum about as long as wide. Mesopleuron with some coriaceous sculpture between strong punctures and with moderate impunctate area around speculum. Area superomedia of propodeum about as long as wide; areas of propodeum smooth and shining between strong punctures. Portion of ovipositor that protrudes from metasoma 1.05–1.3 (1.3) times as long as hind tibia.

Description

Head Clypeus moderately large, convex when viewed from side, margin convex; mandibles with lower tooth longer than upper tooth. Occipital carina complete, evenly arched or slightly angled above. Genal carina joining oral carina briefly before reaching base of mandible. Whole head coriaceous and matt, face and clypeus with dense and strong punctures, vertex with some sparse punctures. Antenna with last flagellomeres about as long as wide, scape excised at an angle of about 50°.

Mesosoma Pronotum with epomia indistinct; mesoscutum without notauli; mesopleuron with sternaulus only slightly impressed; scutellum not carinate. Propodeum with complete set of carinae, longitudinal carinae sometimes weak medially; metapleuron with short vertical carina arising above mid coxa. Mesosoma weakly to strongly coriaceous and with strong and dense punctures. Wings hyaline, radial cell along anterior margin of wing 1.0–1.3 times as long as stigma, areolet large, almost rhombic; hind wing with outer veins reduced, usually not pigmented except at base. Legs simple, hind coxa coriaceous and matt.

Metasoma First tergite 1.6–1.7 times as long as second tergite, second tergite 1.5–1.6 times wider apically than basally. First tergite with rather shallow but long glymma, petiolus flattened; first sternite reaching to about half the length of tergite, its sides parallel. Third tergite with laterotergite separated by crease at most at very base; metasoma weakly compressed from tergite 3 onwards. Tergites smooth and shining, almost impunctate, tergites 1 and 2 with quite strong longitudinal striae. Ovipositor almost straight, only weakly downcurved towards tip, laterally compressed, with subapical notch.

Colouration of female

Head black, clypeus and mandibles orange to yellow, yellow from malar space extended upwards over about half height of face as two squares next to compound eyes; antenna black or dark brown, lighter brown to orange towards base. Mesosoma including scutellum black, anterior margin of pronotum and propleurae orange; legs orange, hind tibia darker orange and hind tarsi brown; forewing with stigma often lighter in anterior half. Metasoma brown, lighter brown towards posterior end, especially on laterotergites.

Material examined

Holotype #f, QLD, Windsor Tableland; iii.1981; leg. R. Storey; BMNH. One paratype #f, from the same location.

Figures

Fig. 2. Holotype of Dimophora biquadra sp. n. (a) Habitus. (b) Head. (c) Mesoscutum and head. (d) Head and mesosoma from lateral, showing mesopleural sculpture. (e) Propodeum. (f) Metasoma. Scale bars represent 2 mm (a) and 0.5 mm (b, c, d, e, f).