Micromus perelegans Tjeder, 1936

Zhao, Yang, Tian, Yanlin & Liu, Zhiqi, 2014, New data on the genus Micromus Rambur, 1842 from China (Neuroptera, Hemerobiidae), with a key to Chinese species, Zootaxa 3846 (1), pp. 127-137 : 132-133

Micromus perelegans Tjeder, 1936

( Figs. 2 , 10–17 )

Micromus perelegans Tjeder, 1936: 16 .

Diagnosis. This species is characterized by the special color in the head, vertex yellow-brown with brown stripes around the antennal socket and a couple of triangle brown spots behind the antenna; frons brownish, but frontogenal costa, frontoclypeal costa, pleurostomal costa and mandible blackish. Forewing yellowish-brown with greyish stripes along the gradate series; CuA not fused with MP in forewing and fused in hind wing. Male: extragonopons of gonarcus arm-shaped, blunt distally with teeth; extrahemigonarcus small and oval. Female: subgenital absent.

Measurements. Forewing length 5.9–6.3mm, width 1.9–2.3mm. Hind wing length 4.9–5.8 mm, width 1.7–2.0 mm. Body length 3.1–4.3 mm.

Description. Head. Pale brownish. Eyes black with a metallic luster. Antenna about sixty segmented, yellowbrown with the last segments slightly darker. Vertex yellow-brown with brown stripes around the antennal socket and a couple of triangle brown spots behind the antenna. Frons brownish, except frontogenal costa, frontoclypeal costa, pleurostomal costa and mandible blackish. Labial palpus 3-segmented and maxillary palpus 5-segmented, pale brown.

Thorax. Yellowish-brown, with a light-colored longitudinal stripe throughout. Legs yellowish, with last tarsi brown and two indistinct brown spots on tibiae.

Wings ( Fig. 2 ). Forewing long and slender with round outer margin, pale yellowish-brown with greyish stripes along the gradate series. Veins yellowish-brown with transparent interval. Anterior radial trace bearing 4 ORB’s; ORB1 and ORB4 bifurcated before outer gradate series. MA simple and MP forked into two branches after the short crossvein connected with CuA. Cu simple. Two gradate series, inner gradate series 6 crossveins and outer 10. Hind wing pale yellow and immaculate. Veins hyaline and pale brown from inner gradate series to the distal. Rs with 4 branches. M proximally forked to 2 branches and CuA fused with MP. Two gradate series, inner gradate series 5–6 crossveins and outer 5–6.

Male terminalia ( Fig. 10 ). 9th tergite narrow dorsally and broad ventrally, anteroventral edge projected into the 8th tergite. Ectoproct approximate oval from lateral view, posteroventral edge of ectoproct extended backwards into a long spine; 9th sternite short and almost equal to the length of hind margin of ectoproct. Mediuncus of gonarcus ( Fig. 11–12 ) bend downwards, basally broadened which is covered with long spines and tapered distally. Extragonopons (egps) arm-shaped, blunt distally with teeth. Extrahemigonarcus small and rounded from dorsal view. Terminal lobe of parabaculum ( Fig. 13–14 ) separated from one third distal, and with an upward process in the end. Hypandrium internum ( Fig. 15 ) trapezoidal, with both sides slightly rolled.

Female terminalia ( Fig. 16–17 ). 8th tergite approximate trapezoidal from lateral view. 9th tergite totally fused with ectoproct and broadened ventral part with straight hind margin. Ectoproct approximate square from lateral view. Subgenital absent.

Distribution. China (Gansu, Ningxia, Xinjiang, Hubei)

Material examined. CHINA: 2♂ 3♀, Gansu province, Longnan county, Wen county, Qiushu dam. 26.vii.2011, Hui Wen ( CAU); 1♀, Gansu province, Lanzhou city, Yuzhong county, Xinglong mountain, 21.viii.2007, Shan Huo ( CAU); 2♂ 2♀, Ningxia province, Guyuan city, Jingyuan county, Heshangpu. 12.viii.2012, Yang Zhao ( CAU); 1♀, Ningxia province, Guyuan city, Jingyuan county, Laolong pond. 24.vii.2012, Yang Zhao ( CAU); 1♂, Xinjiang province, Ili Kazak autonomous prefecture, Xinyuan county, Nalati, 7.viii.2007, Shan Huo ( CAU); 1♀, Hubei province, Shennongjia forest, Guanmen mountain. 2.viii.2008, Yongjie Wang ( CAU).

Remarks. This species was described by Tjeder in 1936 by only one male specimen; in this paper we first describe the female specimen and provide the distribution in China. This species is similar to M. variegatus , but is obviously different in many characteristics, the forewing in M. variegatus marked with big brown spots along gradate series and M vein, but in M. perelegans only with greyish stripes along the gradate series; in M. variegatus the area before antenna in head obviously darker while in M. perelegans only frontogenal costa, frontoclypeal costa and pleurostomal costa blackish in head.

Figures

FIGURES 1 – 3. Wings. 1. Micromus. setulosus sp. nov. 2. Micromus perelegans Tjeder, 1936. 3. Micromus. pallidius (Yang, 1987).

FIGURES 10 – 17. Micromus perelegans Tjeder, 1936. 10. Male terminalia, lateral view [A]; 11. Gonarcus, lateral view [B]; 12. Ditto, dorsal view [B]; 13. Parabaculum, lateral view [B]; 14. Ditto, dorsal view [B]; 15. Hypandrium internum, ventral view [B]. 16. Female terminalia, lateral view [A]; 17. Ditto, ventral view [A]. Scale bars (mm): A = 0.5; B = 0.5.