Agrenia cyanura

This species probably is widely distributed in the Rockies, with records from British Columbia, Idaho, Oregon, and Utah, living in wet moss along mountain streams. It is similar to A. agilis, but separated by head shape, which is normal and not prognathous, the stouter claws, and dense Isotomurus - like setal vestiture on the abdomen. Reproductive males may have short setae and a rugose cuticle on the thorax and anterior abdominal segments.