Chelipoda macrostigma, Published, 2007

Published, First, 2007, The Hemerodromiinae (Diptera: Empididae) of New Zealand II. Chelipoda Macquart, Zootaxa 1537 (1), pp. 1-88 : 17-18

6. Chelipoda macrostigma sp. n.

[ Fig. 72 ]

Type material. Holotype ♀: New Zealand, South Is. , FD, Fiordland National Park, S. Borland V. Biv., 730m, Malaise trap in Nothofagus forest, 2–6/ii/1982, JWE [ LUNZ].

Etymology: the specific epithet refers to the strongly developed wing stigma.

Description. Female: length 2.0mm.

Head: black, densely dusted grey. Eyes narrowly separated with frons almost parallel below antennal sockets. All setae black except pale 2–3 serial lpo; ocl slightly stronger than verticals which are arranged as inner (vt1) and outer (vt2) pairs, line of upo terminating between vt1 and vt2. Proboscis black. Palpi pale with dark apical seta. Antenna with scape very short, yellowish, bearing conspicuous black dorsal seta; pedicel brown, globular; postpedicel blackish, 1.7X as long as wide, arista 3.0–3.3X as long.

Thorax: ground colour black, pprnlb yellowish; uniformly dusted grey but mesonotum with indications of 3 narrow darker stripes anteriorly. Chaetotaxy difficult to determine on account of damage but all setae black, apparently similar to C. modica with pprn small and fine.

Legs: C 1 brown, paler basally; F 1 dark blackish brown, yellow apically; C 2 and C 3 brownish, rest of legs yellowish with apical tarsal segments dusky. C 1 0.8X as long as thorax, about 4.5X as long as wide with series of pale bristly hairs in front and a fine black posteroapical bristle separate from usual apical brush of fine pale hairs. F 1 about as long as C 1, strongly inflated, 2.6X as long as wide; ventrally about 4–6 av and 5–7 pv spines, 25 av and 15 pv denticles, all black; 1 large and 1 small basal bristle. T 1 0.8X length of F 1, armed ventrally with linear series of about 23 minute black adpressed denticles forming a ventral ridge with erect hairs in front and behind. Legs otherwise simple, short haired except for slightly stronger apical hairs and dorsal ciliation on F 3 and T 3.

Abdomen: brown, darker on segment 8 and distally; pregenital sternite (sternite 8) with long pointed process from posterior margin ( Fig. 72 ); terminal papillae rather short, dark brown with long hairs.

Wing: Similar to C. modica but veins black, membrane clear, stigma strongly developed black and oval, midway between apices of veins R 1 and R 2+3. Costa with a few stronger erect hairs amongst usual costal ciliation.

Male: the male is unknown.

Comments. C. macrostigma is in the C. modica -group with black thorax and yellow pprnlb, well developed stigma in the wing and a distinctive pointed process of the female pregenital sternite. It is known from a single female collected in February at 750 m in Nothofagus forest in the south west of the South Island.

Figures

FIGURES 71–75. Female pregenital sternite of 71. C. atrocitas sp. n. 72. C. macrostigma sp. n. 73. C. tainuia sp. n. 74. C. modica Collin. 75. C. mediolinea sp. n. 76. head of ♂ C. aritarita sp. n. 77. C. ultraferox sp. n. ♂ scutum, lateral view. 78. C. consignata Collin, ♂ head. 79–80. thoracic profile. 79. C. rangopango sp. n. 80. C. cornigera sp. n. 81. C. gracilis sp. n. ♂ head & front of scutum, dorsal view. Abbreviations: see text.