The other species was Aciagrion pallidum. This species has been reported also from Vietnam, although I have not been able to find it yet, so likely it is localized and/or rare in there. It appears to be a dry season species, when it hides in dry forest and waits for the rains. The rufous abdomen is a good character. I saw only the one male.
Lastly, I also saw few Coeliccia poungyi poungyi, always a nice species to bump into. Here are a few record shots.
|Here is the male of Coeliccia dydima. Note the limited extent of the blue on the abdomen tip and the large anterior dorsal markings on the thorax (in comparison to C. cyanomelas)|
|Here is the female. The pattern on S9 is a good feature.|
|And an immature male (note the color of the eyes). It is very yellow, not blue, and the dorsal markings on the form a pair of somewhat C. mingxiensis like spots, not yet separated into two sets of two (meaning 4 separated spots in total).|
|How about this? Beautiful, but inconspicuous, male Aciagrion pallidum.|
|Finally, Coeliccia poungyi poungyi, a female. Note the solid yellow abdomen tip.|
|And the exquisite male!|