Campylomma chitwanensis Duwal, Yasunaga & Lee

Campylomma chitwanensis Duwal, Yasunaga & Lee

(Figs. 5 A, 8, 11−12)

Campylomma chitwanense Duwal et al., 2010: 14 (n. sp.).

Diagnosis. Recognized by its moderate to small size; comparatively small ventral spots on meso- and metafemora (Fig. 8); nearly U-shaped endosoma (Fig. 11); and small but thick-rimmed female sclerotized rings that are relatively separated each other (Fig. 12).

Description. Female: Similar in general appearance to male. Body more oval; basic coloration pale green or sometimes yellowish green. Eye small; vertex wide. Antennal segment II basally with an obscure ring that is sometimes obliterated. Labium relatively long, reaching base of metacoxa. Meso- and metafemoral spots comparatively small. Genitalia as in Fig. 12; Sclerotized rings thick-rimmed, with toughened posterior margin, relatively separated from each other.

Measurements. ♂/♀: Total body length 2.0−2.6/ 2.0−2.2; length from apex of clypeus to cuneal fracture 1.40−1.62/ 1.38−1.49; width of head across eyes 0.56−0.60/ 0.55−0.57; width of vertex 0.20−0.23/ 0.25−0.26; lengths of antennal segments I-IV 0.12−0.14, 0.55−0.62, 0.32−0.36, 0.24−0.25/ 0.12, 0.45−0.49, 0.31−0.32, 0.24; mesal length of pronotum 0.33−0.39/ 0.35−0.36; basal width of pronotum 0.78−0.84/ 0.75−0.78; maximum width across hemelytron 0.84−0.99/ 0.94−0.96; and lengths of metafemur, tibia and tarsus 0.72−0.84, 1.03−1.21, 0.32−0.36/ 0.72, 0.96−1.04, 0.31−0.35.

Biology. Adults of this species were occasionally collected from inflorescences of various plants (Asteraceae, Dipterocarpaceae and Tiliaceae) but the breeding host is yet to be confirmed. Collection records suggest C. chitwanensis should have at least two generations per year.

Remarks. Females of C. chitwanensis usually cannot be separated from those of C. lividicornis and smallsized C. livida by external characters alone. Observation of the female genitalia is the only method to equivocally differentiate these species. In some areas in Thailand, any of five species (chitwanensis, livida, lividicornis, nanna and pimai) may co-occur (or simultaneously be collected by light traps or by sweeping inflorescences of broadleaf angiosperms), and thus dissection of the female genitalia is obligatory for making reliable species identifications.

Specimens examined. THAILAND: Nakhon Nayok: 1♀, Sarika, N14°18'39" E101°18'00", at light, 13 Mar 2009, T. Yasunaga (AMNH_PBI 00379953). Nakhon Ratchasima: 3♂ 1♀, SERS, 14˚30'27”N, 101˚55'39”E, 410 m alt., light trap, 12−14 Jun 2009, T. Yasunaga, K. Yamada (00379955−00379957) (TYCN); 1♂, SERS, 14˚30'27”N, 101˚55'39”E, 410 m alt., light trap, 23 Sep 2013, T. Yasunaga, A. Wolski (00379958) (TYCN); 1♂, SERS, front garden, flowers of Shorea obtusa Wall (Dipterocarpaceae), 14 Apr 2013, T. Yasunaga, (TYCN); 1♂, SERS, Meteorology Sta., 14°30'38"N, 101°55'50"E, 385 m alt., flowers of Microcos tomentosa Sm. (Tiliaceae), 31 May 2012, T. Yasunaga (00379959) (TYCN). NEPAL: Makawanpur Dist. (Terai Plateau): 4♂, Chitwan National Park, Machan, 27°32'09"N, 84°44'13"E, on Mikania micrantha (L.) Kunth (Asteraceae), 28−30 Nov 2006, T. Yasunaga and R. Duwal (holotype & 3 paratypes, 00378893−00378896) (NMTU, TYCN).