Oestropsyche vitrina Hagen, 1859

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 : 687-688

Oestropsyche vitrina Hagen, 1859

( Figs. 177–182 )

Macronema vitrinum Hagen, 1859: 209 [Holotype male; Sri Lanka;

MCZ ( Ross, 1952: 35)]. Polymorphanisus vitrinus (Hagen) Hagen, 1864: 875 . Oestropsyche palingenia Brauer, 1868: 266 [Lectotype male;

Philippines; IRSNB; synonymised by Ulmer, 1907: 29]. Oestropsyche vitrina (Hagen) Ulmer, 1907: 29 . Oestropsyche hageni Banks, 1939: 56 [Holotype male; India; MCZ;

synonymised by Barnard, 1980: 66].

Diagnosis. Male. Antennae 30 mm in length, light brown with dark brown striations. Forewing 17 mm and hind wing 8 mm. Mesoscutum and mesoscutellum without evident markings. Tibial spurs 1.3.2.

Male genitalia. Inferior appendages two-segmented and apex forming somewhat lobular structure, potentially mistaken as separate segment. Phallus in lateral view with same orientation as that of A. sexpunctata ( Fig. 180 ). Lateral tubercles in segment X well-developed.

Female. Antennae 13 mm in length, light brown with dark brown striations. Forewing 20 mm and hind wing 12 mm. Mesoscutum and mesoscutellum without evident markings. Tibial spurs 1.2.2.

Uy et al.: Southeast Asian Macronematinae

Material examined. Philippines: 1 male, 5 females, Nueva Vizcaya, Imugan, coll. C.J. Uy, 13 January 2014 ( UPLBMNH) ; 1 male, Nueva Ecija, Pantabangan, coll. C.J. Uy, 1 May 2013 ( UPLBMNH) .

Distribution. India, Iria Jaya, Laos, Malaysia (Perak), Philippines (Luzon), Sri Lanka, Sumatra, Thailand, Java, Borneo, Bali, Sulawesi.

Remarks. Based on original description by Hagen (1859), the inferior appendages were not stated whether it is segmented or not. Barnard (1980) provided a detailed description of this species during his revision study however, illustrated that inferior appendages are unsegmented. The samples that we examined showed that inferior appendages of O. vitrina are two-segmented ( Fig. 178 ). The male wings ( Fig. 177 ) and male genitalia ( Figs. 178–181 ) were redrawn. Head in dorsal view was also figured to show the structure of setal warts ( Fig. 182 ). The tibial spurs of O. vitrina are extremely variable, with male specimens possessing tibial formulas of 0.2.2, 1.2.2, 1.3.2, 2.2.2, 2.3.2, or 2.3.3 and female specimens possessing tibial formulas of 0.2.2, 1.2.2, 2.2.2, 2.3.2, or 2.3.3.

Figures

Figs. 177–182. Oestropsyche vitrina. 177, fore- and hind wing; Male genitalia: 178, lateral; 179, segment X dorsal; 180, phallus lateral; 181, phallus tip; 182, Head dorsal. Scale bars: 177 = 2 mm; 178–181 = 0.5 mm; 182 = 1 mm.