Stonefly Species Bolshecapnia milami (Little Snowflies)

Source: A Review Of The Genus Bolshecapnia Ricker, 1965 (Plecoptera: Capniidae), And Recognition Of Two New Nearctic Capniid Genera

Male epiproct (n = 6). Length 490 - 530 µm, width at mid-length 137 - 148 µm, basal width 127 µm. Lateral margins almost parallel, but slightly swollen in areas (Figs. 7, 9, 13 - 15, 19, 23). Epiproct bearing a pair of short basolateral hooks and an apical, ventrally curved hook (7 - 8, 10, 15, 16, 21); tips of basolateral hooks extend forward for about 0.5 of the total epiproct length. On the dorsal surface, forward of the basolateral hooks a large area of spongy appearing tissue is located on either side of the well-developed median groove (Figs. 11 - 12, 17 - 18, 21, 24). Median groove extends from the base to an enlarged, subapical orifice (Figs. 7 - 8, 14). Tergal process (n = 6). A thimble-shaped process is located in the median field of tergum 9, near the anterior border of the segment (Figs. 9, 12, 18). The anterior hook reaches approximately to, or slightly beyond the tergal process (Figs. 14 - 15). Vesicle (n = 1). Length = 275 µm, basal width = 231 µm, median width = 312 µm; outline oval, surface covered with thick setae (Fig. 22).

Female subgenital plate (n = 2). This structure is truncate across the posterior margin, sometimes with the suggestion of one or more small notches; and scarcely reaches beyond the posterior margin of sternum 8 (Fig. 17, see also fig. 172 in Baumann et al. 1977).