Priotyrannus hueti Drumont, 2008

This species is one of two members of the genus that found from Vietnam. P. hueti was described from North of Vietnam by Alain Drumont in 2008 base on materials from Tam Dao National Park, Vinh Phuc Province.
It is medium large size, as compared to related species Priotyrannus closteroides (Thomson, 1877). The most remarkable characteristic of the species is a lobe on lateral side of pronotum on both male and female specimens.

Male of Priotyrannus hueti Drumont, 2008

Neurobasis chinensis (Linnaeus, 1758)

This is quite common Asian species and is one of the earliest known species of dragonfly. It was named by Linnae based on a picture in book cover of bird. And because in the picture the specimen was drawn with the wings in horizontal position, this species formerly was put in Anisoptera suborder by Linnae. Name of species is specified its locality, from China.

The medium sized damselfly, this species has shining green body and hind-wing is metallic green. The head, thorax and abdomen of the male are metallic green while female has fader green body. The wings of the male distinguish from them of the female. Female’s fore-wing has a white spot at pterosigma position – psedopterostigma, while male’s fore-wings are dust yellowish hyaline and instead of psedopterostigma, there is a white spot at nodus position. The hind-wings of female are shinning colorful, metallic green with an apical black patch on upper side and they are quite dust yellowish hyaline in female.

They are very active damselflies, and live at open swift streams from low to high lands. They never fly far from their breeding habitat; males are strict in territorial defense by showing their flash metallic green hind-wings. Males fly very close to the water surface while females usually perch on vegetations nearby. In courtship flying, males usually keep the hind-wing open in horizontal position to show the flash green upper surface of the wings under sunshine. Sometime males just clap their hind-wings as resting and the action is signal to other males in territorial informing or to coming females for mating. Females insert their eggs into aqua vegetation tissue; in many cases, female sinks in the water during the oviposition while the male around.

Male, photographed by Cuong Do, Ba Vi

Male, photographed by Cuong Do, Pioac Nature Reserve, Cao Bang Province

Male, showing his hind wing in opened position, photographed by Cuong Do, Hon Ba Nature Reserve, Khanh Hoa Province

Lucanus kraatzi giangae Ikeda, 1997

The taxon was described by Haruo Ikeda as a subspecies of Lucanus kraatzi Nagel, 1926.

The subspecies L. kraatzi giangae found from North Vietnam, near Vietnam-China border. The taxon also considered as Vietnamese endemic subspecies. The subspecies was named after a Vietnamese, who is the wife of a Japanese's collector, Ms. Doan Lan Giang. 

The subspecies can be easy separated to L. kraatzi kraatzi Nagel, 1926 based on the position of the middle teeth on mandible. The teeth about the middle of mandible in L. kraatzi giangae but it look near the apex in L. kraatzi kraatzi. The size of L. kraatzi giangae also larger than it related subspecies. L. kraatzi kraatzi was found in Yunnan Province, South China.

L. kraatzi giangae was found in the good forests with elevation about 1900m.

Lucanus kraatzi giangae Ikeda, 1997 (dorsal view)

Lucanus kraatzi giangae Ikeda, 1997 (oblique view)