Hayesomyia cinctuma, Cheng, Ming & Wang, Xinhua, 2006

Cheng, Ming & Wang, Xinhua, 2006, Review of Hayesomyia Murray & Fittkau (Diptera: Chironomidae: Tanypodinae) from China, Zootaxa 1147, pp. 35-59 : 38-41

Hayesomyia cinctuma sp. n. (Figs. 5–9)

Type material

Holotype male (BDN No.21906), CHINA: Guizhou Province, Daomai County, Dashahe River Natural Conversation, 600 m, 25.V.2004, light trap, H. Q. Tang. Paratypes: 1 male (BDN No.02252), Fujian Province, Jianning County, Wuyi Mountain, Tongmu township, 658 m, Qili, 28.IV.1993, light trap, X. H. Wang.

FIGUERS 5–9. Hayesomyia cinctuma sp. n. male imago. 5, thorax. 6, abdomen. 7a, fore leg. 7b, mid leg. 7c, hind leg. 8, wing. 9, hypopygium.

Male imago (n = 2)

Dimensions. Total length 3.6–3.63 mm. Wing length 2.08–2.32 mm. Total length/wing length 1.57–1.75. Wing length/length of profemur 2.18–2.64.

Coloration. Head brown. Ground color of thorax yellow, brown pigmentation confined to narrow band on anteanepisternum II along anapleural suture, center 1/4 of preepisternum, basal 3/4 of median anepisternum II and majority of posterior anepisternum II, darker brown pigmentation confined to 2/3 of scutellum, 5 areas of the scutum and posterior 2/3 of postnotum (Fig 5). Tergite I pale brown; tergite II pale brown with 2 small brown rounded marking in middle; tergite III brown; tergite IV pale brown with narrow brown basal band; tergite V brown with broad dark brown basal band; tergites VI brown with brown rounded basal marking and additional dark stripe along lateral margins; tergites VII–VIII dark brown (Fig. 6). Hypopygium pale brown. Legs pale with narrow brown ring at apices of all femora, basally and distally on all tibiae, apices of all tarsomeres 2, all of tarsomeres 3 (Fig. 7b, 7c), and tarsomere 4 of fore leg (Fig. 7a). Wings with 3 distinct pigmented areas, 1 transverse band over crossveins r­m and m­cu, 1 around apex of r3 and 1 on m3+4; wing membrane extensively infuscated (Fig. 8).

Head. AR 1.2–1.22. Temporal setae 12–14; including 10 verticals and 2–4 postorbitals. Clypeus with 23–38 setae. Tentorium 153–185 µm long, 35–45 µm wide. Palpomere 1–5 lengths (µm): 48–48; 78–83; 150–190; 200–220; 310–320.

Wing (Fig. 8). VR 0.84–0.89. Brachiolum with 3 long setae. Squama with 30–33 setae.

Thorax. Antepronotal setae 5; dorsocentrals 20–33; acrostichals 19–26; prescutellars 2–3; supraalars 2; prealars 9–11; scutellars 14–16.

Legs. Spur on fore tibia 60–68 µm long with 6 lateral teeth. Spurs on mid tibia 63–65 and 68–80 µm long with 8 lateral teeth. Spurs on hind tibia 55–75 and 83–100 µm long with 6 lateral teeth. Tibial comb on hind leg with 6 setae. Lengths (µm) and proportions of legs as in Table 2

Hypopygium (Fig. 9). Tergite VIII distally expanded and covering basal portion of tergite IX. Gonocoxite 173–175 µm long. Gonostylus 138–140 µm long. Median volsella 28–50 µm long, 30–35 µm wide. HR 1.25–1.25. HV 2.57–2.64.

Distribution

This species was found in a southwestern province (Guizhou Province) and an eastern province (Fujian Province) of Oriental China.

Diagnosis

This new species differs from other known species of the genus Hayesomyia by the banded abdomen, characteristic wing markings, and banded legs. It is similar to H. zayunica sp. n. in having an expanded tergite VIII distally, but the markings of the body and wings are different.

Tables

TABLE 2. Lengths (µm) and proportions of legs of H. cinctuma sp. n.

	fe	ti	ta1	ta2	ta3	ta4	ta5	LR
p1	870–950	1050–1125	880–930	390–450	300	230–240	120–140	0.83–0.84
p2	975–1150	950–1050	630–650	310	230–240	190	120	0.6–0.68
p3	925–1075	1175–1275	880–950	500–510	360–370	250–280	130–150	0.75