Mouthparts are for chewing. Most sawflies are somewhat host-specific. The elm sawfly feeds on elm and willow. On broadleaved tree leaves, larvae usually feed on the underside of the leaf. On oaks, Caliroa spp.
Some species are leaf rollers, web formers, leaf skeletonizers, leaf miners or cause plant galls.
Adults can be found on flowers. They are called sawflies because females of most species have a saw-like structure on the tip of their abdomens used to inject eggs into plant tissue. For additional information, contact your local Texas extension service agent, or search for other state extension service offices.