Strongylophthalmyia darlingi Evenhuis

Evenhuis, Neal L., 2016, World review of the genus Strongylophthalmyia Heller (Diptera: Strongylophthalmyiidae). Part I: Introduction, morphology, species groups, and review of the Strongylophthalmyia punctata subgroup, Zootaxa 4189 (2), pp. 201-243 : 214-217

Strongylophthalmyia darlingi Evenhuis , n. sp. ( Figs. 7 , 20 )

Diagnosis. This species is similar to S. federeri , n. sp. in both possessing yellow on the head, mesonotum and anteriormost tergites, but can be easily distinguished from it based on the non-modified bacilliform male palpus (racquet-shaped in S. federeri ).

Description. Lengths. Ƌ: body, 3.8 mm; wing, 3.2 mm. Male. Head ( Fig. 7 ): elongate, longer than high; frons shining brown posterior to ocellar tubercle, yellowish brown to ptilinal suture; face yellow; gena yellow, silvery pollinose, row of short black hairs ventrally; occiput brown, yellowish brown posteroventrally; clypeus thin, yellow; palpus bacilliform, unmodified, with row of short brown hairs ventrally.

Antenna ( Fig. 20 ): scape and pedicel yellowish brown; flagellomere subovoid, yellow, clothed with white hairs, with long, slender, slightly curved brown dorsal process densely clothed with decumbent white hairs, 1.5 times length of flagellomere; arista reduced to stump, short, one-fifth length of flagellomere, bare.

Thorax: shining; mesonotum and scutellum brown, yellow along anterior and lateral mesonotal margins, sparsely clothed with short white hair-like setulae; pleura yellow; anepisternum with scattered white hairs.

Wing: hyaline; vein R2+3 nearly straight, ending in costa before level of crossvein dm-cu; crossvein r-m at basal one-fourth of cell dm; crossvein dm-cu sloping toward CuA1; last section of CuA1 shorter than dm-cu; veins R4+5 and M1+2 parallel distally; halter white.

Legs: coxae and fore femora yellowish white, mid and hind femora yellow basally, brown apically; fore coxa with 3 long yellowish white hairs; fore femur with patch of 10–12 minute thorn-like spicules dorsally, with cluster of hairs forming thorn-like process subbasally, 3 very long, stiff orange-yellow hairs laterally at base; tibiae yellowish white; tarsi white.

Abdomen: tergites I–III yellowish; tergites IV–VI brown, with short sparse brown hairs, these hairs longest on tergites V–VI; sternites tan.

Male genitalia. Not dissected; epandrium and surstylus shining brown, with white hairs; cerci light brown, very narrow basally, flared and rounded apically, with long white hairs.

Female. Unknown.

Material examined. Holotype ♂ from INDONESIA: Sumatra : Aceh: Gunung Leuser National Park, Ketambe Research Station [3°41'N, 97°39'E], 1–28 Feb 1990, D.C. Darling, IIS 90 0 0 15 ( ZMB). Holotype deposited in the Zoological Museum, Bogor.

Distribution. Indonesia (Sumatra).

Etymology. This species is name after Dr. Chris Darling, who collected the type specimen.

Figures

FIGURES 5 – 7. Male Strongylophthalmyia heads. 5. S. thailandica, frontal-lateral angled view. 6. S. thailandica, n. sp., lateral view. 7. S. darlingi, n. sp..

FIGURES 18 – 25. Male Strongylophthalmyia, antennae. 18. S. borneensis, n. sp.; 19. S. caestus, n. sp.; 20. S. darlingi, n. sp. 21. S. federeri, n. sp.; 22. S. hauseri, n. sp.; 23. S. immaculata Hennig, arrow points to minute dorsal antennal process; 24. S. indochinensis, n. sp., arrow points to short dorsal antennal process; 25. S. inundans, n. sp.