Rihirbus
Rihirbus is a genus of assassin bug from the tropical parts of the Oriental region. They belong to the Harpactorinae and the genus is unique in having the fore tibiae with incurved tips and the apex having a long tooth. They show sexual dimorphism and are polymorphic making their identification to species complicated. Females are larger and wider. "R. trochantericus" takes about 49 days to develop from egg to adult in southern India. The genus "Camptibia" has an incurved tip to the foretibia, but lacks subapical teeth. The head is shorter than the pronotum and the base of the  antenna has a spine behind it. The antennal scape is about as long as the head, pronotum and scutellum put together. They show considerable polymorphism and sexual dimorphism and in the past a number of species have been described but only three are currently recognized.