Genus Tyriobapta
Tyriobapta includes three species rather larger than Brachygonia. They are also mainly confined to forested swampy areas, although they are not common in peat swamp forest.
Tyriobapta torrida is the most abundant and widespread species . It is the largest member of the genus (hw, 26-27 mm) and the males are recognized by the broad, slightly metallic bluish-black area at the base of the hind wings. It is found from the lowlands to about 600 m. Both sexes perch vertically on tree trunks which they defend against all comers, perhaps in order to maintain feeding territories. The density is such that it is common to find every substantial tree trunk along a forest path the object of violent dispute with as many as 20-30 individuals present in a 100 m transect. Towards the middle of the day it is common to see males racing back and forth over small pools, chasing each other and mating with females as they arrive to oviposit.
Tyriobapta laidlawi (hw, 24-25 mm) is a slightly smaller and scarcer species. It is sometimes found together with Tyriobapta torrida but is generally more localized.
Tyriobapta kuekenthali is rather similar to Tyriobapta laidlawi but is darker, with a dark brownish suffusion at the base of the wings. It is still more localized than laidlawi and much more so than torrida. Both laidlawi and kuekenthali are also given to perching on tree trunks, but never seem to occur at high densities. They appear to be confined to the lowlands.