Enithares freyi Brooks, 1948

Zettel, Herbert, Lane, David J. W., Pangantihon, Clister V., Freitag, Hendrik & Be, Jalan Tungku Link, 2012, Notes on Notonectidae (Hemiptera: Heteroptera) from southeastern Asia, mostly from Brunei and the Philippines, Acta Entomologica Musei Nationalis Pragae 52 (1), pp. 29-48 : 36

Enithares freyi Brooks, 1948

( Figs. 9 , 14 )

Enithares freyi Brooks, 1948: 48 ; NIESER & ZETTEL (1999: 130); ZETTEL (2003: 124). Enithares freyi freyi: LANSBURY (1968: 438) ; CHEN et al. (2005: 422).

Material examined. PHILIPPINES: LUZON: Ilocos Norte Province, Solsona, Gasgas River , 29.x.2002, leg. H. Zettel (320a), 1 ♀ ( NHMW) ; Nueva Viscaya Province, Santa Fe, Imugan, stream at Imugan Falls , 1000 m a.s.l., 6.xi.2002, leg. H. Zettel (325), 9 JJ 9 ♀♀ ( NHMW, UPLB, HFDG) ; Nueva Viscaya Province, Santa Fe, Barakbak, 620 m a.s.l., Barakbak River , 7.xi.2002, leg. H. Zettel (326), 1 J ( NHMW) ; Nueva Viscaya Province, Santa Fe, Malico, Maliit , Maliit River , 1200 m a.s.l., 8.xi.2002, leg. H. Zettel (329), 2 JJ 2 ♀♀ ( NHMW) ; Nueva Viscaya Province, Santa Fe, Malico, Dulipay River , 8.xi.2002, leg. H. Zettel (331), 1 ♀ ( NHMW) ; Nueva Viscaya Province, Santa Fe, Malico , small creek, 8.xi.2002, leg. H. Zettel (332), 1 ♀ ( NHMW) .

Notes. NIESER & ZETTEL (1999: fig. 16) have illustrated the genitalia of the male; in this figure the characteristic lateral arm of the basal plate of the aedeagus is partly covered by the posterior lobe of the genital capsule. Figure 14 shows its complete outline. See also notes for E. quadrispinosa .

Hitherto, Enithares freyi has been very rarely collected, but in the municipality of Santa Fe, Caballos Mountains, it commonly inhabits suitable places at elevations from 600 to 1200 m a.s.l. Deep, shaded bays along the edges of the streams are the main requirement of this species.

Distribution. Endemic in northern and central Luzon in the Philippines: Mountain Province, Benguet ( BROOKS 1948, NIESER & ZETTEL 1999), Laguna (ZETTEL 2003); first records for Ilocos Norte and Nueva Viscaya.

Figures

Figs. 8–13. Notonectinae. Habitus, dorsal aspect: 8 – Aphelonecta philippina Zettel, 1995, male. 9 – Enithares freyi Brooks, 1948, male. 10 – E. intha Paiva, 1918, female. 11 – E. quadrispinosa Lansbury, 1967, male. 12 – E. sinica (Stål, 1854), male. 13 – E. subparallela Lansbury, 1968, male. © NHMW Hemiptera Image Collection.

Fig. 14–19. Enithares Spinola, 1837, morphological details. 14–15 – lateral arms of basal plate of aedeagus, left aspect: 14 – E. freyi Brooks, 1948; 15 – E. quadrispinosa Lansbury, 1967. 16–17 – left mesotrochanter of female, ventral aspect: 16 – E. intha Paiva, 1918 (sp = spur); 17 – E. sinica (Stål, 1854). 18–19 – metaxiphus of female, ventral aspect: 18 – E. intha; 19 – E. sinica.