Amphipsyche gratiosa Navás, 1922

Uy, Christine Jewel C., Malicky, Hans & Bae, Yeon Jae, 2018, Review of the filter-feeding caddisfly subfamily Macronematinae (Trichoptera: Hydropsychidae) in tropical Southeast Asia, Raffles Bulletin of Zoology 66, pp. 664-703 : 667-668

Amphipsyche gratiosa Navás, 1922

( Figs. 17–21 )

Amphipsyche gratiosa Navás, 1922: 62 [Holotype male; Vietnam (lost)]; Barnard, 1984: 98 (redescription).

Diagnosis. Male. Antennae 35 mm in length. Antennal flagellum light brown to yellowish with darker striations. Forewing 12 mm and hind wing 6 mm in length. Forewing with very evident markings as shown in Fig. 17 . Tibial spurs 1.4.4.

Male genitalia. Inferior appendages slender and unsegmented. Phallus apex with leaf-like lobes, each bearing single spine ( Fig. 21 ). In lateral view, Segment IX narrow.

Female. Antennae 11 mm in length. Antennal flagellum same colouration as male except less dark and less obvious striations. Forewings 8 mm and hind wing 6 mm in length. Forewings without evident markings. Tibial spurs 0.4.4.

Material examined. Thailand: 1 male, 15 females, Chiang Dao district , Ping river, coll. H. Malicky, 10 June 2003 ( UPLBMNH) ; 44 males, 54 females, Mae Wang district , Mae Wang stream, coll. C.J. Uy, 12 May 2015 ( UPLBMNH) .

Distribution. Burma, Cambodia, Laos, Thailand, Vietnam.

Remarks. The males of this species possess very distinguished markings in forewings as shown in Fig. 17 , whereas females lack forewing markings. The examined female specimens lack both crossvein sc-c and dilation of the anal forewing area.

Figures

Figs. 17–36. Amphipsyche gratiosa. 17, right forewing; Male genitalia: 18, lateral; 19, segment X dorsal; 20, phallus lateral; 21, phallus tip. Amphipsyche magna. Male genitalia: 22, lateral; 24, phallus lateral; 25, phallus tip; 23, thorax. Amphipsyche meridiana. 26, right forewing; Male genitalia: 27, lateral; 28, segment X dorsal; 29, phallus lateral; 30, phallus tip. Amphipsyche parva. Male genitalia: 31, lateral; 32, phallus lateral; 33, phallus tip. Amphipsyche petiolata. 34, lateral; 35, phallus lateral; 36, phallus tip. Scale: 17, 26 = 2 mm, 18–25, 27–36 = 0.25 mm (22–25, 27–36 redrawn from Barnard, 1984).