Reduviidae (Hemiptera) is a large, cosmopolitan family of predatory insects, including the assassin bugs (genera include Melanolestes, Platymeris, Pselliopus, Rasahus, Reduvius, Rhiginia, Sinea, Triatoma, and Zelus), wheel bugs (Arilus cristatus) and thread-legged bugs (the subfamily Emesinae, including the genus Emesaya). There are about 7,000 species altogether, making it one of the largest families in the Hemiptera.