Drymeia pilifemorata Xue and Wang

Xue, Wan-Qi, Wang, Dan-Dan, Zhang, Xue-Zhong & Xiang, Chao-Qun, 2007, Five new species of Drymeia Meigen from the Tibet Plateau, China (Diptera: Muscidae), Zootaxa 1444, pp. 35-51 : 48-50

Drymeia pilifemorata Xue and Wang , sp. nov.

( Figs. 29–33 )

Description

Male. Body length 5.5–6.0 mm. Head: Eye bare; frons about 1.5–2.0 times as wide as anterior ocellus; frontal vitta black, its narrowest part equal to or narrower than one fronto-orbital plate; frontal setae 9–11, the longest seta extending to anterior ocellus, with thin hairs among them; with a pair of ocellar setae, without interfrontal setae and orbital seta; fronto-orbital plate and parafacial with greyish pruinosity; parafacial about 1.3 times as wide as 1st flagellomere; antenna black, 1st flagellomere about 1.5 times as long as wide, arista ciliated, the longest aristal hairs slightly longer than its basal diameter; facial carina developed; epistoma protruding over frontal angle in profile; gena black, with 3–4 rows of upcurved subvibrissal setulae, genal height about 1/5 of eye height; dorsal area of occiput with hairs; proboscis thin and long, with grey pruinosity, prementum about 4.0 times as long as broad; palpus black, slightly shorter than the length of prementum, labella enlarged in lower part.

Thorax: Ground color black, with dense grey pruinosity; scutum with four indistinct vittae, with 2 rows of presutural acr, 1–2 pairs strong among them, postsutural acr 1, dc 2+3, ia 0+2, pra strong, about 2/3 length of posterior notopleural seta; notopleuron with hairs; lateral and ventral margins of scutellum, basisternum of prosternum, anepimeron, meron and katepimeron all bare; katepisternal setae 1+2.

Wing. Brown, wing base and veins dark brown; basicosta black, costal spine short and small, Sc straight; dorsal and ventral surfaces of radial node bare, m-m crossvein slightly S-shaped, R4+5 and M veins parallel, more or less separated distally; calypters yellowish; halter black.

Legs. Entirely black; fore tibia with 2 pv in the middle; mid femur with a complete av row, which becomes bigger towards apical part, with long hair-like pv in basal half; mid tibia without ad, 4–5 pd, 3–4 pv; hind femur with a complete row of av and pv, pv hair-like; hind tibia with 1–2 short av, 2 ad, 4–5 pd, 2–3 hairlike pv, with a distinct apical ventral projection that has 1 short seta on it; all tarsi longer than tibiae, fore claws short, about 1/2 length of pulvilli, hind claws slightly longer than pulvilli.

Abdomen. Black, egg-shaped, all tergites with dense brownish-grey pruinosity, black median vittae of all tergites becoming narrower towards posterior margin, all tergites with setigerous spots around the base of setae, sternite 1 bare; outboard processes of cerci indistinct, cerci only slightly concave in posterior view, with small pointed processes medially, distal 1/3 broad in posterior view; processes on inner margin of surstylus sharply pointed in the middle in lateral view.

Female. Unknown.

Type material

Holotype, male, P.R. CHINA: Tibet, Jiangda, 3400 m, 21.vii.1976 (Yin-heng Han). Paratype, P.R. CHINA: 4 males, 1 female, the same data as holotype, 1 male, Tibet, Chaya, Jingtangjiuxi, 3600 m, 17.vii.1976, (Yin-heng Han), 2 males, Qinghai, Yushu County, 3750 m, 12.vi.1964 (Shu-yong Wang).

The specimens are deposited in the Chinese Academy of Sciences, Beijing, China.

Remarks

This species resembles Drymeia xinjiangensis (Qian and Fan) , but differs from it in the wider parafacial; arista ciliated, and the longest setae distinctly more than diameter of aristal base, mid femur with a row of long hairs in basal 1/3 of posterior ventral surface; hind femur with a row of fringe-like long hairs in basal half of posterior ventral surface; hind tibia with 4–5 erect and slender pv on 1/3 basal part of ventral surface.

Etymology

The species name is from the Latin words pil- meaning hairs and femorata meaning femur, referring to male hind femur with a row of fringe-like long hairs in basal half of posterior ventral surface.

Figures

FIGURES 29 – 33. Drymeia pilifemorata Xue and Wang, sp. nov. (male). 29. Abdomen in dorsal view. 30. Hind femur in anterior view. 31. Sternite 5 in ventral view. 32. Cerci in posterior view. 33. Terminalia in profile view.