Yellow-spotted Dusk-hawker

The body length of this dragonfly species is around 70~77 mm, the abdomen length is 54~61 mm and the length of their hindwings is around 46~49 mm. This species does not have significant sexual dimorphism, they have olive green colored compound eyes with dark brownish faces, their legs are black, thorax is black with 2 pairs of light green strips on each side and 1 pair on the front, wings are transparent, abdomen is black with parallel light green strip-like spots on 1st~8th segment; color of females is lighter and their ovipositors are comparatively less developed. The naiad has inverted trapezoidal head with pumped out compound eyes.

The phylogyny of genus Cephalaechna is poorly studied. However, from morphology perspective, the naiad of Cephalaechna is very similar to genus Planaeschna. An article written in 2002 also suggests that Cephalaechna is the sister group of genus Caliaeschna.