Hayesomyia tripunctata (Goetghebuer)

Cheng, Ming & Wang, Xinhua, 2006, Review of Hayesomyia Murray & Fittkau (Diptera: Chironomidae: Tanypodinae) from China, Zootaxa 1147, pp. 35-59 : 53-55

Hayesomyia tripunctata (Goetghebuer) ( Figs. 32–35 )

Tanypus tripunctatus Goetghebuer, 1922: 59 , Fig. 17

Ablabesmyia tripunctata Goetghebuer, 1936: 25 , 37

Thienemannimyia (?) tripunctata (Goetghebuer) in Fittkau, 1962: 194 Hayesomyia tripunctata (Goetghebuer) Murray & Fittkau, 1985: 199

Material examined

1 male (BDN No.09722), CHINA: Yunnan Province, Huaping County, Xi Township Liangma River, 1280 m, 30.V.1996, light trap and sweep net, Y. Z. Du.

Male imago (n = 1)

Dimensions. Total length 3.4 mm. Wing length 1.8 mm. Total length/wing length 1.89. Wing length/length of profemur 2.12.

Coloration. Head pale brown. Ground color of thorax yellow, brown pigmentation confined to narrow band on anteanepisternum II along anapleural suture, anterior border and wedge­shaped area on median vitta at level of beginning of lateral vittae, anterior margin of lateral vittae, postalar callus, and posterior 1/2 of postnotum ( Fig. 32 ). Tergite I pale brown; tergite II with brown basal mark on both sides, tergites III–VI with narrow band on basal 1/3; tergite VII brown on basal 2/3; tergite VIII entirely pale brown ( Fig. 33 ). Gonocoxite brown, gonostylus brown. Legs pale with narrow brown ring at apex of all femora and bases of tibiae. Wings with 3 distinct pigmented areas, 1 around humeral crossvein, 1 along crossveins r­m and m­cu and 1 at junction of R1 and costa ( Fig. 34 ).

Head. AR 1.56. Temporal setae 14; including 10 verticals and 4 postorbitals. Clypeus with 19 setae. Tentorium 153 µm long, 45 µm wide. Palpomere 1–5 lengths (µm): 55; 78; 120; 165; 93.

Wing ( Fig. 34 ). VR 0.95. Brachiolum with 3 long setae. Squama with 19 setae.

Thorax. Antepronotal setae 4; dorsocentrals 14; acrostichals 22; prescutellars 2; supraalars 2; prealars 7; scutellars 16.

Legs. Spur on fore tibia 35 µm long with 6 lateral teeth. Spurs on mid tibia 38 and 48 µm long with 6 lateral teeth. Spurs on hind tibia 43 and 68 µm long with 5 and 7 lateral teeth, respectively. Tibial comb on hind leg of 7 setae. Lengths (µm) and proportions of legs as in Table 8 .

Distribution

This species is known from the Oriental and Palaearctic Regions. It was found in a southwestern province (Yunnan Province) of Oriental China.

Diagnosis

This species differs from other known species of the genus Hayesomyia by the banded abdomen and characteristic wing markings.

Remarks

The wing length of the Chinese specimen (1.80 mm) is slightly less than the wing length (2.50 mm) described by Murray & Fittkau (1985). The LRI of the Chinese specimen (0.84) is higher than the LRI (0.78) described by Murray & Fittkau (1985).The bands of tergites III–VI of the specimens described by Murray & Fittkau (1985) are separated in the middle, but are entire in the Chinese specimen. The phalloapodeme is not forked (incorrect in the original diagnosis by Murray & Fittkau (1985), as indicated in Fig. 7 by Murray & Fittkau (1985)).

Figures

FIGURES 32 – 35. Hayesomyia tripunctata (Goetghebuer) male imago. 32, thorax. 33, abdomen. 34, wing. 35, hypopygium.

FIGURES 14 – 18. Hayesomyia galbina sp. n. male imago. 14, thorax. 15, abdomen. 16, femalelike antenna probably from intersex specimen. 17, wing. 18, hypopygium.

Tables

TABLE 8. Lengths (µm) and proportions of legs of H. tripunctata sp. n.

fe	ti ta1	ta2	ta3	ta4	ta5	LR
p1 850	1075 900	420	270	210	120	0.84
p2 775	900 530	240	190	150	95	0.59
p3 875	1200 900	450	320	190	110	0.75