Polyrhachis bicolor Smith, 1858

Polyrhachis bicolor Smith, 1858 is a wide distributed species, the holotype was collected from Myanmar and deposited in London Museum of Nature History. They now have been recorded from Australia to IndoMalaya Region as well as China. Name of the species maybe express the colors of the ant (bi=two), they are characteristic with dark grey head and thorax and red abdomen and legs.
The species has 9 subspecies: Polyrhachis bicolor atrocastanea, Polyrhachis bicolor aurata, Polyrhachis bicolor aurinasis, Polyrhachis bicolor brachyacantha, Polyrhachis bicolor comata, Polyrhachis bicolor erecta, Polyrhachis bicolor exflavicornis, Polyrhachis bicolor fumata, Polyrhachis bicolor weyeri.

Polyrhachis bicolor Smith, 1858 - photographed by Ta Thanh

Polyrhachis armata (Le Guillou, 1842)

Polyrhachis armata (Le Guillou, 1842) in an interesting spiny ant species, they found from South East Asia and South China. The species found in Indo-Australia region: Borneo, Indonesia, Malaysia, Philippines; Oriental region: Cambodia, India, Thailand; Palaearctic region: South China. The type locality of the species is Philippines. Syntype of the species now are deposited in British Museum of Nature History, London. In Vietnam, there has been 11 species of the genus were recorded and this is the 12th member, recorded the first time for Vietnam fauna by a photographers.

Polyrhachis armata (Le Guillou, 1842) - photo taken by Do Hung Tuan

Polyrhachis armata (Le Guillou, 1842) - photo taken by Bui Trong Hieu

Polyrhachis armata (Le Guillou, 1842) - photo taken by Nguyen Thanh Tuan

Polyrhachis armata (Le Guillou, 1842) - photo taken by Ta Thanh