Simply put, a bug is an insect that has sucking, not chewing, mouthparts and has gradual metamorphosis. When winged, the forewing is divided, half is membranous, the other half is hardened.
They are members of the order Hemiptera (in the olde sense!)
So here goes, tropical bugs.
Tessaratomidae: Lyramorpha parens. We have dealt with this one before.
Reduviidae: Harpactacorinae, undetermined genus, perhaps Helonotus
Pyrrhocoridae: Dindymus sp mating
Thanks to Tom Weir and G. Cassis for help with the identifications. Any errors are not theirs.
Monteith, G. B. 2006. Maternal Care in Australian oncomerine shield bugs (Insecta, Heteroptera, Tessaratomidae). Denisia 19, zugliech Kataloge der OO, Landesmuseen Neue Serie 50: 1135-1152.