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

Campsicnemus ii Evenhuis, new species

( Fig. 25 )

Diagnosis. Fits closest to C. oo, n. sp. but is distinguished from that species by the long, thin, unswollen mid tibia (mid tibia normal in length and swollen apically in C. oo).

Description. Male. Body length: 1.9–2.1 mm. Wing length: 2.0– 2.3 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; antennal segments brown; postpedicel long, lanceolate-conical, length 3 x width; arista slightly longer than head height.

Thorax: Mesoscutum, scutellum, and pleura dark brown to brown throughout, with a few metallic bluish and bronze highlights dorsolaterally and laterally; thoracic setae black: 3 dc; 2 np; 2 ph; 1 pa; 1 + 1 sc; ac absent; halter stem and knob yellowish white.

Legs: CI yellowish, CII and CIII brown; remainder of legs yellowish; femora unmodified, without MSSC; TiI ( Fig. 25 ), with large pad-like process apically, length of pad-like process subequal to width of tibia, apical pad-like process rounded (MSSC), remainder of foreleg unmodified; TiII slightly thicker medially, with 2 strong setae on dorsal surface, single strong zigzagged seta just before middle on dorsomedial surface (MSSC). 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, a few longer hairs laterally; tergal interstices whitish; sternites yellowish brown. Hypopygium dark brown with paler brown cerci, not dissected.

Female. As in male except for absence of MSSC; postpedicel short, length subequal to width.

Types. Holotype ɗ (BPBM Type 16,653) [BPBM 101241] from FRENCH POLYNESIA: Marquesas: NUKU HIVA: Toovii, Oomu, 900 m [274 m], 16–19 Jul 1977, on mushroom fungus, S.L. Montgomery. Paratypes: 1ɗ, 1Ψ [BPBM 101242], NUKU HIVA: ridge towards Tekau, from Toovii, 850–1000 m [259–328 m], 8 Aug 1980, G. Paulay (specimens bleached). Holotype and paratypes in BPBM.

Etymology. The specific epithet derives from the Marquesan ‘i‘i = “force, energy”. 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.