Hayesomyia fengkainica, 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 : 41-43

Hayesomyia fengkainica sp. n. ( Figs. 10–13 )

Type material

Holotype male (BDN No.1440), CHINA: Guangdong Province, Fengkai County, Heishiding Natural Conservation Area, 927 m, 19.IV.1988, light trap, X. H. Wang. Paratypes: 2 males (BDN No.01432, 14333), same data as holotype.

Etymology

The species is named after the type locality.

Male imago (n = 3)

Dimensions. Total length 3.38–3.65, 3.48 mm. Wing length 1.8–1.88, 1.83 mm. Total length/wing length 1.82–2.03, 1.9. Wing length/length of profemur 2.07–2.26, 2.16.

Coloration. Head brown. Ground color of thorax brown, darker brown pigmentation confined to narrow band on anteanepisternum II along anapleural suture, anterior 1/5 of preepisternum, 1/3 of median anepisternum II, 4 areas of scutum and posterior 2/3 of postnotum ( Fig. 10 ). Ground color of abdomen yellow, tergite I pale yellow; tergites II–VI each with narrow brown basal band; tergite VII entirely brown; tergite VIII brown on basal 1/2 ( Fig. 11 ). Hypopygium dark brown. Legs pale with narrow brown ring at apex of femora. Wings with 2 distinct pigmented areas, 1 around crossveins r­m and m­cu and 1 on distal end of r4+5 ( Fig. 12 ).

Head. AR 1.33–1.4, 1.37. Temporal setae 12–14, 13; including 8–10, 9 verticals and 2–4, 3 postorbitals. Clypeus with 18–20, 19 setae. Tentorium 138–175, 157 µm long, 38–40, 39 µm wide. Palpomere 1–5 lengths (µm): 38–60, 51; 83–88, 85; 140–158, 150; 170–198, 183; 230–270, 250.

Wing ( Fig. 12 ). VR 0.79–0.95, 0.88. Brachiolum with 2–3, 2 long setae. Squama with 23–30, 27 setae.

Thorax. Antepronotal setae 4; dorsocentrals 19–20, 20; acrostichals 20–21, 21; prescutellars 1; supraalars 2; prealars 8–10, 9; scutellars 10–16, 14.

Legs. Spur on fore tibia 38–45, 42 µm long with 5 lateral teeth. Spurs on mid tibia 45–48, 46 and 48–58, 53 µm long with 6 lateral teeth. Spurs on hind tibia 38–43, 40 and 55–73, 64 µm long with 7 and 5 lateral teeth. Tibial comb on hind leg with 6 setae. Lengths (µm) and proportions of legs as in Table 3 .

Hypopygium ( Fig. 13 ). Tergite IX with irregular slightly concave row of 12–16, 13 setae. Gonocoxite 155–173, 161 µm long. Gonostylus 120–138, 129 µm long. Median volsella 23–43, 26 µm long, 25–28, 27 µm wide. HR 1.13–1.44, 1.25. HV 2.42–2.84, 2.57.

Diagnosis

This new species differs from other known species of the genus by the characteristic wing markings and banded abdomen. It is similar to H. aquila sp. n. in having a banded abdomen, but the wings have two distinct pigmented areas, one around the crossveins r­m and m­cu and one distally on r4+5 ( Fig. 12 ), whereas the wings of H. aquila sp. n. have pigmented areas around the humeral vein and on m3+4 ( Fig. 3 ). In addition, H. fengkainica has a narrow brown ring at the apex of all femora.

Figures

FIGURES 10 – 13. Hayesomyia fengkainica sp. n. male imago. 10, thorax. 11, abdomen. 12, wing. 13, hypopygium.

FIGURES 1 – 4. Hayesomyia aquila sp. n. male imago. 1, thorax. 2, abdomen. 3, wing. 4, hypopygium.

Tables

TABLE 3. Lengths (µm) and proportions of legs of H. fengkainica sp. n.

	fe	ti	ta1	ta2	ta3	ta4	ta5	LR
p1	830–870 850	1020–1100 1065	910–940 920	450–470 460	300–320 310	210–230 217	110–130 118	0.85–0.89 0.86
p2	870–90040 883	820–840 833	620–630 623	210–260 240	200–200 200	160–170 163	90–110 100	0.74–0.77 0.75
p3	730–790 767	1075–1150 1117	900–940 917	420–460 443	330–350 340	190–230 213	90–130 113	0.79–0.87 0.82