Fig. 2 in Underwater Pupation by the Comal Springs Riffle Beetle, Heterelmis Comalensis Bosse, Tuff, and Brown, 1988 (Coleoptera: Elmidae), with an Update on Culture Techniques

Fig. 2. Mean Heterelmis comalensis adult counts for three lures buried in spring upwellings within 3 m of one another during a 17-week monitoring period at Spring Run 2, Comal Springs, Texas, with standard error bars.