The Crambidae are a family of Lepidoptera with various subfamilies, which are very variable in appearance.
In the Crambinae subfamily, for example, moths keep their wings in positions closely related to the body and rest on stems of
grass where they are inconspicuous, while other subfamilies include brightly colored insects and geometric patterns.
In many classifications, the Crambidae have been treated as a subfamily of the Pyralidae .
The main difference is a structure in the ears called praecinctorium , which joins two tympanic membranes in the Crambidae ,
and is absent from the Pyralidae .
Since Crambidae are relatively common in all human settlements, these moths tend to affect crops and gardens, in a harmful, beneficial or harmless way. An example of a "beneficial" moth is Acentria ephemerella which is used as a biocontrol agent against Myriophyllum spicatum * (Common Water Yarrow).
McLeod, Robin (April 24, 2016). "Species Niphograpta albiguttalis - Water Hyacinth Moth - Hodges#5149 - https://bugguide.net/