Allorhynchium argentatum (Fabricius, 1804)

Fig. 2A-I

Vespa argentata Fabricius, 1804: 260.

Allorhynchium argentatum (Fabricius); van der Vecht 1963: 60.

Material examined.

Vietnam: 1♂, Son La, Muong La, Nam Pam, alt. 660 m, 25.vii.2009 [25 July 2009], Lien Thi Phuong Nguyen, Phong Huy Pham, J Kojima leg. ; 1♀, Son La, Phu Yen, Quang Huy, 21°15'50"N, 104°38'56"E, 18.vi.2015 [18 June 2015], Dai Dac Nguyen leg. ; 1♀, Son La, Yan Chau, Muong Lum, Ban Khau Khoang, 21°2'7"N, 104°26'51"E, alt. 1000 m, 20.vi.2015 [20 June 2015], Dai Dac Nguyen leg ; 1♂, Son La, Moc Chau, Pha Luong, 20°43'09"N, 104°37'04"E, alt. 630 m, 22.vi.2020 [22 June 2020], Lien Thi Phuong Nguyen, Cuong Quang Nguyen, Ngat Thi Tran, Thai Van Mai leg. ; 1♂, Hai Phong, Cat Ba, Cat Hai, 20°50'39"N, 106°56'42"E, 24.vii.2013 [24 July 2013], Lien Thi Phuong Nguyen, Dai Dac Nguyen leg. ; 2♂♂, Hoa Binh, Mai Chau, Chieng Chau, Lac village, alt. 600 m, 10.vi.2008 [10 June 2008], Lien Thi Phuong Nguyen, Phong Huy Pham leg. ; 1♀, Hoa Binh, Mai Chau, Pa Co, 21°56'16.7"N, 102°52'58.1"E 22.vii.2009 [22 July 2009], Lien Thi Phuong Nguyen, Phong Huy Pham, J Kojima leg. ; 1♀, 1♂, Thanh Hoa, Quan Hoa, Pu Hu NR, 20°31'32.1"N, 104°57'38.5"E, alt. 284 m, 12.vi.2016 [12 June 2016], Lam Xuan Truong, Dai Dac Nguyen, Ngat Thi Tran, Linh Ngoc Ha leg. ; 1♂, Thanh Hoa, Quan Hoa, Pu Hu NR, 20°29'13.3"N, 104°57'47.2"E, alt. 408 m, 13.vi.2016 [13 June 2016], Lam Xuan Truong, Dai Dac Nguyen, Ngat Thi Tran, Linh Ngoc Ha leg. ; 1♂, Thanh Hoa, Quan Hoa, Pu Hu NR, 20°33'56"N, 104°58'39.7"E, alt. 255 m, 14.vi.2016 [14 June 2016], Dai Dac Nguyen, Ngat Thi Tran, Linh Ngoc Ha leg. ; 2♂♂, Thanh Hoa, Quan Hoa, Pu Hu NR, 20°33'37.3"N, 105°00'37.9"E, alt. 120 m, 15.vi.2016 [15 June 2016], Dai Dac Nguyen, Ngat Thi Tran, Linh Ngoc Ha leg. ; 5♀♀, 6♂♂, Thanh Hoa, Trung Son, 1.x.2017 [1 October 2017], Lien Thi Phuong Nguyen leg. ; 1♀, Quang Tri, Dakrong, Huc Nghi, 18.vii.2004 [18 July 2004], ISD-c leg .; 1♀, Quang Tri, Huong Hoa, Huong Linh, 5.vi.2006 [5 June 2006], ISD-c leg .; 1♀, Kon Tum, Dak Ha, Dak Mar, coffee garden, alt. 603 m, 19.vii.2012 [19 July 2012], Lien Thi Phuong Nguyen leg. ; 1♂, Kon Tum, Sa Thay, Chu Mom Ray NP, 31.iii-4.iv.2014 [31 March - 4 April 2014], Tru Vu Hoang leg. ; 1♂, Kon Tum, Dak Glei, Dak Choong, Ngoc Linh NR, 15°11.8'N, 107°47.6'E, alt. 1064 m, 9.iv.2015 [9 April 2015], Lien Thi Phuong Nguyen, Dai Dac Nguyen, Minh Phuong Nguyen leg. ; 1♀, 1♂, Kon Tum, Dak Glei, Dak Choong, Ngoc Linh NR, 15°18'N, 107°49'E, alt. 849 m, 10.iv.2015 [10 April 2015], Lien Thi Phuong Nguyen, Dai Dac Nguyen, Minh Phuong Nguyen leg. ; 1♀, Gia Lai, KBang, Dak Roong, Kon Ka Kinh NP, 8.vi.2011 [8 June 2011], ISD-c leg .; 1♀, 1♂, Gia Lai, Ka Bang, Konpne, Kon Ka Kinh NP, 14°23'22.9"N, 108°20'27.5"E, alt. 847 m, 16.vii.2012 [16 July 2012], Lien Thi Phuong Nguyen leg. ; 2♀♀, Gia Lai, Chu Se, rubber and pepper garden, 14.iv.2013 [14 April 2013], Lien Thi Phuong Nguyen leg. ; 1♀, Dak Lak, Krong Bong, Chu Yang Sin NP, 12°27'05.3"N, 108°20'24.3"E, alt. 744 m, 5.v.2016 [5 May 2016], Lien Thi Phuong Nguyen, Dai Dac Nguyen, Ngat Thi Tran leg. ; 1♂, Dak Lak, Krong Bong, Chu Yang Sin NP, 12°24'56.8"N, 108°21'02.1"E, alt. 772 m, 9.v.2018 [9 May 2018], Lien Thi Phuong Nguyen, Lam Xuan Truong, Tuan Viet Luong leg. ; 3♀♀, 9♂♂ Dak Nong, Dak Glong, Dak Som, Ta Dung NR, 11°50'16.1"N, 107°59'16.7"E, alt. 745 m, 6.v.2016 [6 May 2016], Lien Thi Phuong Nguyen, Dai Dac Nguyen, Ngat Thi Tran leg. ; 1♀, Dong Nai, Tan Phu, Nam Cat Tien NP, 9.viii.2005 [9 August 2005], Lien Thi Phuong Nguyen, J Kojima leg. ; 1♀, Ba Ria - Vung Tau, Con Dao, Ben Dam, 29.x.2020 [29 October 2020], Hiep Duc Nguyen leg. [IEBR]. India; 1♀, Tamil Nadu, Loyola, 16-18.XII.1978 [16-18 December 1978], Madras leg. [SYC]. Indonesia: 1♂, Sako NR, Tapan, W. Sumatra, 4-5.ix.1985 [4-5 September 1985], S. Yamane leg.; 2♂, Lubuk Gadang, W. Sumatra, 22.vii.1985 [22 July 1985], Sk & S. Yamane leg. [SYC].

Remarks.

This species is recorded from Vietnam for the first time, but there is a color variation in the male clypeus: entirely black (Fig. 2B), almost black with two narrow transverse yellow strips basally (Fig. 2C), black with a transverse yellow strip basally (Fig. 2D), and black with a thick transverse yellow strip basally plus a large yellow spot medi-apically (Fig. 2E). Male genitalia of the species are described here for the first time.

Male genitalia.

As in Fig. 2F-I. Parameral spine lacking setae. Volsella flattened, spatulate, wide on inner aspect, and with setae at top (Fig. 2F, G). Digitus gradually widen from base to two-thirds length, then extended to apex to form two lobes, a black short one with serrated teeth laterally and a transparent lance lobe with dense long setae (Fig. 2F, G). Penis valves long, much longer than basal apodeme (~ 1.36 × as long as basal apodeme); in ventral view proximal part strongly produced laterally into oval shape (Fig. 2H); in profile apical part strongly produced into two large lobes (Fig. 2I), upper lobe larger than lower lobe; proximal margin smooth (Fig. 2I).

Distribution.

Pakistan; India: Andaman & Nicobar Islands, Arunachal Pradesh, Assam, Chhattisgarh, Goa, Himachal Pradesh, Karnataka, Kerala, Meghalaya, Mizoram, Sikkim, Tamil Nadu, Tripura, Uttarakhand, Uttar Pradesh, West Bengal; Nepal; Bhutan; Myanmar; Thailand; Laos; Malaysia; Singapore; Indonesia: Sumatra, Java, Bali, Borneo, Sulawesi; Philippines: Mindanao; Vietnam (new record).