1) Arthropod family 2) Family belostomatidae 3) Water bugs 
Belostomatidae is a family of insects in the order Hemiptera, known as giant water bugs or colloquially as toe-biters, Indian toe-biters, electric-light bugs, alligator ticks or fleas (in Florida). They are the largest insects in the order Hemiptera, and occur worldwide, with most of the species in North America, South America, Northern Australia ...
[n] - water bugs
family Belostomatidae noun water bugs