Hydrometra greeni Kirkaldy, 1898

(Figs. 1E–F, 2E–F, 3E–F, 4E–F, 5E–F)

Hydrometra greeni Kirkaldy, 1898: 2 (type locality: Pundaloya, Sri Lanka).

Material examined. INDIA, ANDAMAN AND NICOBAR ISLANDS, Andaman District, South Andaman, Gandhi Park, 269 ft. N 11°39.693’, E 92°44.660’, 1.iii.2012, 1 ♂ (brapt.), 1 ♀ (mac.), Coll. E. Eyarin Jehamalar, (Reg. No. 3155/H15); South Andaman, Wandoor, 35 ft, N 11°35.787’, E 92°37.183’, 5.iii.2012, 1 ♂ (mac.), Coll. E. E. Jehamalar, (Reg. No. 3156/H15). CHHATTISGARH, Bilaspur District, Karidongri Rest House, 380 m, N 22°20’55.1’’, E 81°36’33.8’’, 19.ix.2012, 5 ♂ (mac.), 2 ♀ (mac.), Coll. A. Raha & Party, (Reg. No. 2836/H15); Durg District, Balod Beat, N 20°42’49.6’’, E 81°09’43.9’’, 25.ix.2012, 1 ♂ (mac.), Coll. A. Raha & Party, (Reg. No. 2806/H15); Kabirdham District, Rangakhara Rest House, 651 m, N 21°57’35.2’’, E 80°52’54.7’’, 6.vi.2012, 1 ♂ (mac.), Coll. A. Raha & Party, (Reg. No. 2730/H15); Kawardha Range, Saroda Dam, 469 m, N 21°58’34.3’’, E 81°08’25.4’’, 22.ix.2012, 1 ♂ (mac.), Coll. A. Raha & Party, (Reg. No. 2794/H15); Korba District, Sericultural farm, 1.vi.2012, 1 ♀ (mac.), Bijakhara nala, 182 m, N 22°19’42’’, E 83°4’1.7’’, 1.xi.2011, 1 ♂ (mac.), 1 ♀ (brapt.), 1 ♀ (mac.), Coll. K. Chandra & Party, (Reg. No. 2729/H15); Bijakhara Nala, 324 m, N 22°24’50’’, E 83°0’34’’, 1.vi.2012, 1 ♂ (mac.), 1 ♀ (brapt.), 1 ♀ (mac.), Coll. K. Chandra & Party, (Reg. No. 2731/H15); Koriya District, GGNP, Kotadole, Meur River near FRH, 483 m, N 23°43’41.1’’, E 82°03’49.9’’, 10.v.2013, 1 ♂ (mac.), 1 ♀ (mac.), Coll. A. Raha & Party, (Reg. No. 3125/H15); GGNP, Kotadole, Basin Path, Jalpani Forest, 604 m, N 23°45’49.6’’, E 82°09’13.4’’, 11.v.2013, 1 ♂ (mac.), 1 ♀ (mac.), Coll. A. Raha & Party, (Reg. No. 3124/H15); Raipur District, Barnawapara WLS, 157 m, N 21°25’61.7’’ E 82°27’81.5’’, 7.vii.2011, 1 ♂ (mac.), 1 ♀ (mac.), Coll. Sunil & Party, (Reg. No. 2796/H15); Dullibahal pond, 1.xi.2011, 8 ♂, 1 ♀, Coll. Anil & Angshuman, (Reg. No. 2540/H15); Surguja District, Ambikapur Range, Bilgumpha, 628 m, N 23°19’14.7’’, E 83°12’16.7’’, 14.ix.2012, 2 ♂ (mac.), 4 ♀ (mac.), Coll. A. Raha & Party, (Reg. No. 2793/H15); Tara Range, Lekhutdand, 632 m, N 22°49’47.7’’, E 82°44’3.5’’, 15.ix.2012, 1 ♂ (mac.), 1 ♀ (mac.), Coll. A. Raha & Party, (Reg. No. 2795/H15); Tara Forest Rest House, 617 m, N 22°50’01.0’’, E 82°44’19.1’’, 16.ix.2012, 4 ♂ (mac.), 4 ♀ (mac.), Coll. A. Raha & Party, (Reg. No. 2835/H15); Tara Range, Abhay Nala, 601 m, N 22°53’34.4’’, E 82°43’45.1’’, 17.ix.2012, 9 ♂ (mac.), 2 ♀ (mac.), Coll. A. Raha & Party, (Reg. No. 2837/H15); Ramkola Range, Tamor-Pingla WLS, Pingla Nala, 565 m, N 23°38’46.8’’, E 82°59’42.6’’, 14.v.2013, 2 ♀ (mac.), Coll. P. Dawn, (Reg. No. 3087/H15); Ramkola, Tamor-Pingla WLS, Debijharia, 556 m, N 23°38’30.3’’, E 82°59’7.3’’, 15.v.2013, 1 ♀ (mac.), (Reg. No. 3127/H15)., 17.v.2013, 3 ♀ (mac.), (Reg. No. 3128/H15), Coll. A. Raha & Party. HARYANA, Karnal District, Kartarpur, 11.iii.1971, 6 ♂ (mac.), 6 ♀ (mac.), Coll. A. Singh, (Reg. No. 3066/H15); MAHARASHTRA, Nasik District, Nandur Madhmeshwar Bird Sanctuary, Niphad, Near Godavari River, 3.iii.2013, 1 ♀ (mac.), Coll. M.E. Hassan & Party, (Reg. No. 3047/H15). ODISHA, Mayurbhanj District, Near Simlipal Hills, Lulung, 15.ii.1975, 1 ♂ (mac.), Coll. R.I. Chowdhury & Party, (Reg. No. 3064/H15). TAMIL NADU, Kanyakumari District, Nagercoil, Pond in Scott Christian College campus, 60 m, N 08°10’58.2’’, E 077°24’20.3’’, 4.iii.2008, 1 ♂., 20.viii.2008, 2 ♂ (mac.), Coll. E. E. Jehamalar, (Reg. No. 2538/H15)., 22.x.2012, 1 ♀ (mac.), Coll. E. E. Jehamalar & Ahila, (Reg. No. 2820/H15); Karavilai village, 30.viii.2008, 1 ♀, Coll. Jenila, (Reg. No. 2539/H15). All the examined materials are deposited in ZSI, Kolkata.

Diagnosis. Mostly occur in macropterous form, mac. ♂ length range 10.09–11.12, n=5 and mac. ♀ 10.57– 10.95, n=5; anteclypeus conical with acute tip (Fig. 2F); seventh abdominal sternum of male with deep broad transverse depression (very prominent in lateral view), sternites 6 and 7 with dispersed long setae (Fig. 4E); median longitudinal white stripe on hemelytra interrupted by 3–5 brownish hue (Figs. 1E, F); females can easily be identified by posteriorly raised abdominal segment VII and the ventro-caudad caudal process (Figs. 3F, 5F).

Distribution. INDIA: Andaman and Nicobar Islands, Arunachal Pradesh, Assam, Bihar, Chhattisgarh, Gujarat, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Odisha, Puducherry, Rajasthan, Tamil Nadu, Uttar Pradesh and West Bengal. Elsewhere: Bangladesh, China, Indonesia, Laos, Malay Peninsula, Myanmar, Nepal, Singapore, Sri Lanka, Thailand and Vietnam (Polhemus & Polhemus, 1995, Tran et al., 2010, Yang & Zettel, 2005 and Zettel, 2006).

Remarks. This species is distributed throughout India. H. greeni is often attracted to lights and can be found on moist leaf litter far from the freshwater bodies; thus it has very good dispersal ability. This species sometimes is found along with H. butleri. The males of H. greeni are readily identifiable by the depression on sternum VII, whereas H. butleri has a swollen sternum VII. The females of these two species can be separated by the strongly raised segment VII in H. greeni, which is flat in H. butleri. The caudal process of female H. greeni is directed ventro-caudad, but in H. butleri, it is directed straight caudad with setal fringe. Earlier records of H. maindroni by Polhemus & Starmühlner (1990) from the Andaman Islands is doubtful because H. maindroni was described from Oman, Muscat (Hungerford & Evans, 1934; Andersen, 1995); later this species was reported from the United Arab Emirates (Linnavuori et al. 2011). In our present collection we examined a few examples of H. greeni from Andaman and Nicobar Islands, among these we have not observed any H. maindroni.