Boreophilia eremita

Diagnosis. Body moderately broad, forebody slightly and abdomen strongly glossy (Fig. 6); length 3.0 - 3.6 mm; dark brown to almost black, appendages light brown or reddish brown; antennomeres VIII-X subquadrate to slightly elongate; pronotum as long as elytra at suture, maximum width of pronotum slightly less than maximum width of elytra, pronotum in males is longer and less transverse that in females. Male. Tubus of median lobe of aedeagus with two, sharp basolateral projections on both sides in dorsal view (Figs 9, 10), and in lateral view ventral part of tubus produced angularly at base (Figs 7, 8), bulbus broadly oval in dorsal view, with two elongate narrow sclerites of internal sac (Fig. 9); tergite VIII arcuate apically (Fig. 11); sternite VIII elongate, parabolic apically (Fig. 12). Female. Spermatheca: capsule pitcher-shaped basally with elongate narrowly conical apical part without apical invagination, stem sinuate, narrowly looped posteriorly (Fig. 15); tergite VIII arcuate apically (Fig. 13); sternite VIII rounded apically, antecostal suture moderately sinuate (Fig. 14). The median lobe of aedeagus of B. eremita is similar to that of B. islandica, but tubus is more elongate, narrower, less arcuate, and with basal projection angular in lateral view (Figs 7, 8), in dorsal view tubus with two pointed latero-basal projections (Figs 9, 10). In B. islandica, the tubus is broader, shorter, more arcuate ventrally, and with basal arcuate projection rounded in lateral view (Fig. 17), in dorsal view tubus with two smaller and less angular basal projections (Fig. 18). Spermathecae of the two species is variable in shape and very similar, female tergite and sternite VIII are similar in shape but sternite VIII in B. eremita has feebly arcuate medial part of antecostal suture (Fig. 14), which is strongly sinuate in B. islandica in the majority of examined specimens (Fig. 22). On average, the body of B. eremita is narrower and elytra shorter than that of B. islandica.