Utah State University Extension
The term “sod webworm” refers to an insect complex of more than twenty different grass-infesting species. Adult sod webworms are pyralid moths, but are more commonly referred to as “snout moths” because their mouthparts are projected forward (Fig. 1). Sod webworms are distributed through the U.S., and at least seven different species occur in Utah (Table 1).
Hodgson, Erin W. and Roe, Alan H., "Sod Webworms" (2007). All Current Publications. Paper 952.