Campsicnemus

Evenhuis, Neal L., 2009, Review of Campsicnemus (Diptera: Dolichopodidae) of the Marquesas, French Polynesia, with description of four new species groups, Zootaxa 2004, pp. 25-48 : 46-47

Campsicnemus oo Evenhuis, new species

( Fig. 26 )

Diagnosis. Most similar in appearance to C. ii, n. sp. but can be separated from it by the apical process of the mid tibia with an tibial comb and fine hairs at tip (tibial comb and apical hairs absent in C. ii) and the swollen mid tibia with rows of black spines (mid tibia not swollen in C. ii).

Description. Male. Body length: 2.5 mm. Wing length: 2.9 mm.

Head. Black, face dark brown to black with reddish highlights, dark brown near clypeus; oc and vt black, about one-third length of antennal arista; front, occiput, and vertex black with blue highlights; face constricted at middle, almost holoptic, eyes separated below antennae by width of 1–2 ommatidia; palp small, dark brown; proboscis brown, extending slightly below eye in lateral view; scape and pedicel dark brown; scape length 2 x pedicel; postpedicel and arista broken off and missing.

Thorax: Mesoscutum, scutellum, and pleura dark brown to brown throughout, with a few metallic greenish highlights dorsally and dorsolaterally; thoracic setae black: 4 dc; 2 np; 2 ph; 1 pa; 1 + 1 sc; ac absent; halter stem and knob white.

Legs: CI yellowish, CII and CIII brown; remainder of legs yellowish; femora unmodified, without MSSC; TiI with large pad-like process apically, length of pad-like process subequal to width of tibia, ventral surface with short stiff spicule-like setae, apical pad-like process with tibial comb (pecten) and small patch of short minute hairs at tip (MSSC), remainder of foreleg unmodified; TiII slightly thicker medially, with 4 strong setae on mesal surface, 7 strong spiky setae on dorsal surface (MSSC) admixed with short fine hairs. TiIII unmodified. Remainder of leg segments without MSSC.

Wing: pale smoky throughout; posterior crossvein perpendicular to vein M.

Abdomen. Dark brown with short black hairs dorsally on each tergite; sternites brown. Hypopygium dark brown with paler brown cerci, not dissected.

Female. Unknown.

Types. Holotype ɗ (BPBM Type 16,657) [BPBM 101253] from FRENCH POLYNESIA: Marquesas: NUKU HIVA: Matauuna, 3760 ft [1146 m], 1 Aug 1929, sweeping, Mumford & Adamson, Pacific Entomological Survey. Holotype in BPBM.

Etymology. Derives from the Marquesan ‘o‘o = “rubbed, grated”; referring to the incomplete nature of the holotype with broken setae and hairs on the mesonotum and tergites. The name is treated as a noun in apposition.

Figures

FIGURES 23 – 27. Campsicnemus apices of fore tibiae showing hook-like process and setal arrangement. 23. C. aa, n. sp. 24. C. ee, n. sp. 25. C. ii, n. sp. 26. C. oo, n. sp. 27. C. uu, n. sp.