Grass moths

Definition

Common name for the moth family Crambidae (Lepidoptera), encompassing small to medium-sized moths whose larvae typically feed on grasses and herbaceous plants. The name particularly references the Crambinae subfamily, whose adults rest with wings folded tightly against grass stems, rendering them cryptic; other subfamilies include more conspicuous, often brightly patterned species that rest with wings spread.

Etymology

From the resting posture of Crambinae adults on grass stems and the larval association with Poaceae and related plants.

Example

The Crambinae grass moth Orocrambus flexuosellus rests with wings appressed to grass culms, whereas the subfamily Pyraustinae includes Eurrhypara hortulata, a boldly marked species that rests with wings fully expanded.

Synonyms

• Crambid moths

Related Terms

• Crambidae
• Crambinae
• Pyraloidea
• stem borers
• snout moths
• lepidopteran larvae

Usage Notes

Used broadly for Crambidae as a whole, though most strictly applicable to Crambinae. Distinguished from 'snout moths' (another common name for Crambidae emphasizing the elongated labial palps) by emphasis on habitat association and cryptic resting posture. Not all Crambidae are grass-associated; some subfamilies occupy aquatic, arboreal, or detritivorous niches.