Allometopon

Owen Lonsdale, 2016, Revision of the genus Allometopon Kertész (Diptera: Clusiidae), Zootaxa 4106 (1), pp. 1-127 : 67-68

Allometopon female 5

Figs 329, 330

Description. General: (Fig. 329, 330) Body length 4.7mm. Arista pubescent, with hairs slightly longer apically. M1+2 ratio 3.9. First flagellomere well-developed, not obviously enlarged, slightly higher than long. Clypeus broad, robust. Male unknown.

Chaetotaxy: Three fronto-orbital setae, anterior seta approximately ¾ length. Ocellar seta twice length of ocellar tubercle. Postvertical seta as long as tubercle. Interfrontal seta well-developed. Frons with minute setulae. Three closely spaced dorsocentrals posteriorly on scutum; anterior seta as long as acrostichal, middle seta slightly more than half length posterior seta. Acrostichal seta well-developed. One lateral scutellar seta.

Colour: Setae brown to dark brown, paler on legs and whitish portion of pleuron. Head yellow with first flagellomere dark brown above point of pedicel, ocellar tubercle dark brown, face dirty light yellow, clypeus dark brown with centre light brown, apical and ventral margins on distal half of palpus brownish, back of head whitish ventrally, and parafacial, gena and postgena whitish and silvery tomentose. Notum with orange-brown tint that makes underlying dark brown pattern on scutum difficult to distinguish; scutum with one pair of narrow dorsocentral stripes nearly reaching transverse suture that are connected on basal half, and lateral margin of scutum with stripe that extends onto (and slightly expands on) posterior region of notopleuron. Scutellum dark brown with faint orange tint on apical and lateral surfaces, being palest at base of apical setae. Metanotum dark brown, paler medially on mediotergite. Pleuron yellowish-white with dark brown subnotal stripe from dorsal half of proepisternum to dorsal half of anepimeron. Wing dusky, slightly darker along anterior margin. Halter whitish with knob dark brown. Legs yellowish-white. Abdomen dark brown with segment 8 paler and segment 10 and cercus light brown.

Female terminalia: Not dissected.

Distribution: Madagascar.

Material examined: MADAGASCAR. Tamatave Torotorofotsy, Andasibe (Perinet), 22km NW, 18˚46.25′S, 48˚25.93′E, 23–25.x. 2014, 960m, A.H. Kirk-Spriggs & R. Harin’Hala, Malaise traps primary rainforest (1♀, BMSA).

Comments: This relatively large species, known from a single female, is characterized by an entirely brown halter knob, three dorsocentrals, a dark subnotal stripe, and a dark notum with three postsutural vittae.