Campsicnemus ogradyi Evenhuis

Evenhuis, Neal L., 2008, The Campsicnemus lobatus and zigzag groups in the Society Islands, French Polynesia (Diptera: Dolichopodidae), Zootaxa 1910, pp. 27-44 : 40-41

Campsicnemus ogradyi Evenhuis , new species

( Figs. 15 , 20 )

Diagnosis. This species is easily distinguished from the other members of this species group by the single hooked or curved seta ( Fig. 15 ) on the ventral third of the male mid femur (this modified setae curlicue, bifid, or zigzagged in the other species).

Description. Body length: 1.4–1.7 mm. Wing length: 1.8–2.0 mm. Male. Head. Black, face black, paler 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 2–4 ommatidia; palp very small, dark brown; proboscis very small, brown, not extending below eye in lateral view; antennal segments dark brown; postpedicel subtriangular, length about equal to width; arista slightly longer than head height.

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

Legs: CI and CII brown; CIII yellowish brown; fore leg all brown; FII and FIII yellow on basal half, brown on apical half; TiII black, rest of legs dark brown; fore and hind legs without MSSC; FII ( Fig. 15 ) swollen on basal 2/3, attenuate on apical 1/3, with 12–14 strong setae lateroventrally, 6 smaller setae on mesoventrally surface, thick hooked seta on apical third of ventral surface; TiII ( Fig. 20 ) conspicuously bowed on apical 3/5, with long setae in middle on dorsal surface (MSSC), smaller black setae and hairs along entire ventral surface. Remainder of leg segments without MSSC.

Wing: Pale smoky throughout; subcostal section straight, not concave; alula extremely reduced; no indentation on M1+2 beyond crossvein dm-cu; crossvein dm-cu perpendicular to CuA1.

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

Female. Unknown.

Types. Holotype ɗ (BPBM 16,654) [BPBM 101243] and paratype ɗ [BPBM 101244] from FRENCH POLYNESIA: Society Is: TAHITI NUI: Vaituoru River, below Marato Hotel, 16 Jul 2006, sweeping rocks in river, P. O’Grady.

Etymology. This species is named for Patrick O’Grady, who collected this species, as well as a number of other new Campsicnemus species on Tahiti and Moorea during a collecting trip with me in July 2006. His decision to walk down the long, steep hill to collect at the stream at the bottom of the valley below the Marato Hotel (and my decision to stay at the hotel and not walk down) was his gain and my loss!

Figures

FIGURES 14 – 18. Campsicnemus zigzag group male mid femur. 14. C. mylloseta; 15. C. ogradyi; 16. C. ostlinx; 17. C. tahaanus; 18. C. zigzag.

FIGURES 19 – 23. Campsicnemus zigzag group male mid tibia. 19. C. mylloseta; 20. C. ogradyi; 21. C. ostlinx; 22. C. tahaanus; 23. C. zigzag.