A single species in North America; many in the Old World.(1)
Several species in North America; 100 species in 4 genera in the world (highest diversity in Asia) according to Tree of Life
Antennae have 13 segments. Tarsi have 2 segments.
Body colors are brown and yellowish brown.
Abdomen has 2 or 3 vesicles
Eggs are laid in groups and are covered by silken threads.