1) Arthropod family 2) Family lygaeidae 3) Lygaeid bugs 
The Lygaeidae are a family in the Hemiptera (true bugs), with some 60 genera in six subfamilies. The family includes the insects commonly known as milkweed bugs, and also some of those known as seed bugs. The family used to be vastly larger, as numerous former subfamilies have been removed and given independent family status, including Artheneidae...
[n] - lygaeid bugs
family Lygaeidae noun lygaeid bugs