Megascogaster wallacei, Kittel, Rebecca N., 2014

Kittel, Rebecca N., 2014, Revision of Megascogaster (Hymenoptera, Braconidae, Cheloninae), with a new species from Sulawesi, Indonesia, Zootaxa 3860 (4), pp. 371-378 : 375-377

Megascogaster wallacei sp. n.

( Fig. 3 , 4 a–c)

Types. INDONESIA: Holotype. 1 ♀, “Sulawesi: Utara, Dumoga-Bone NP, 0°34'N 123°54'E, MT, v-vi 1985, A.D. Austin, edge of rainforest, 220m ” (BMNH). Paratypes. 1 ♀, same as holotype (WINC); 1 ♀, Sulawesi: Utara Bedongo 1985 Noyes et al. (LIPI).

Diagnosis. Megascogaster wallacei differs from M. elongata by the ratio of length of fore wing to length of body 0.75 (0.67 in M. elongata ), having the occipital carina dorsally interrupted, having propodeal tubercules present, mesopleura shiny and smooth, legs dark brown, and females with 28 antennomeres.

Description (female). Body measurements. Length of body 5.9–6.1 mm; ratio of antenna length to body length 0.7–0.8; ratio of fore wing length to body length 0.7–0.8; ratio of metasoma to mesosoma length 1.8.

Head. Twenty-eight antennomeres; ratio of third antennomere to fourth 1.1; length of third, fourth, and penultimate antennomeres 6.6x, 6x, and 1.3x their width, respectively; ratio of length of eye in dorsal view to length of temple 2; ratio of posterior ocelli:POL:LOL:OOL 1.0:1.2:1.0:3.0; frons rugose; ratio of width of face in frontal view to its height 1.4; ratio of length of malar space to base of mandible 1.5; ratio of clypeus width to its length 1.4–1.5; clypeus weak convex and fine punctate; face weak concave and fine punctate; vertex punctate.

Mesosoma. Medial and lateral lobe of mesoscutum punctate; mesoscutellum weak convex and punctate; propodeum areolate, with distinct lateral and median propodeal tubercules present; ratio of height of mesosoma to its length 0.6; ratio of length of hind tibia to length of hind tarsus 1.1–1.2; ratio of length of posterior spur to length of hind tarsus 0.21–0.24; fore wing: ratio of 1-R1 to pterostigma 0.7–0.9; ratio of width of pterostigma to its length 5.3–6.3; ratio of r:3-SR:SR-1:r-m 1.0:0.8–0.9:4.0–4.7:0.6; ratio r to 2-SR 1.8–2.5, 2-SR curved; ratio 1-R1 to 2-R1 2.6–3.8.

Metasoma. Carapace in dorsal view elongate, ratio of width to length 0.26; posterior end of carapace elongated, without lobes or teeth, rugose.

Colour. Head, mesosoma, and metasoma entirely black; mandible ferruginous; antennomeres light brown, gradually darker towards tip; legs brown with exceptions of dark brown fore tibia, dark brown hind tibia, dark brown hind femur, and dark brown hind coxa; anterior half of wing venation yellowish and posterior half brown; wings hyaline.

Male. Unknown.

Distribution. The species is known from the province North Sulawesi (Utara Sulawesi), Indonesia. Etymology. Named after Alfred Russel Wallace and for his concept of ‘Wallace’s Line’. Biology. Unknown.

Figures

FIGURE 3. Megascogaster wallacei sp. n., female, holotype, habitus lateral, scale bar = 1 mm.

FIGURE 4. Megascogaster wallacei sp. n., female, a mesosoma dorsal, holotype, b head frontal, holotype, c fore wing, paratype; scale bars a, b = 0.5 mm, c = 1 mm.