Baryopsis FAIRMAIRE & GERMAIN 1861

Key to the Baryopsis species of Peru

1 Macropterous species of large body size (approximately 17 mm). Elytra with violet hue..................................................................................................... B. calcarata (SOLSKY)

- Micropterous species; elytra very short, approximately half the length of pronotum (Figs 1, 8, 15, 22). Elytra dark-brown to blackish, without violet hue................................2

2 Smaller species; body length 8.0- 8.5 mm. Pronotum with distinct microsculpture composed of longitudinal meshes (Figs 17-18); dorsal series composed of 6-10 punctures. Pronotum and elytra without noticeable micropunctation (Figs 17-18). Pronotum approximately 1.15 times as long as broad, with distinctly convex lateral margins in dorsal view, and distinctly broader than head (Fig. 15). 3: aedeagus smaller, approximately 0.9 mm long, shaped as in Figs 20-21. Southern Peruvian Andes (Cusco)............................................................................................ B. minor nov.sp.

- Larger species; body length at least 10 mm. Microsculpture of pronotum, if present, composed of isodiametric meshes. Pronotum and elytra with micropunctation. Pronotum mostly more oblong, parallel-sided, and at least as broad as head. 3: aedeagus distintly larger and of different shape..................................................................3

3 Conspicuously large species, body length 14-18 mm. Pronotum widest near anterior margin, posteriorly gradually tapering (Fig. 8); lateral margins straight in anterior 3/4, weakly sinuate near posterior angles; microsculpture of head and pronotum distinct and distinctly isodiametric (Figs 9-11). Abdomen with coarse and dense punctation; posterior margin of tergite VIII obtusely angled in the middle. 3: sternite VIII with relatively shallow posterior excision (Fig. 12); aedeagus 2.1 mm long and with slender ventral process (Figs 13-14); paramares not reaching apex of ventral process. Southern Peruvian Andes (Cusco)............................................................................ B. ingens nov.sp.

- Pronotum at most with very shallow microreticulation, either parallel-sided or with maximal width at some distance from anterior margin, lateral margins not sinuate posteriorly. Abdomen with relatively fine punctation; tergite VIII with convex posterior margin. 3: posterior excision of sternite VIII deeper and narrower; aedeagus with less slender and apically hooked ventral process. Northern Peruvian Andes..............4

4 Smaller species; body length 10.0- 13.5 mm. Head with shallower (at least posteriorly) (Fig. 2), pronotum at a magnification of 50 x without microsculpture and conspicuously glossy (Fig. 3). Pronotum more slender, approximately 1.25 times as long as broad, and not parallel-sided, widest in anterior half and distinctly tapering posteriorly (Fig. 1). Elytra without distinct microreticulation and glossy, distinctly dilated posteriad (Fig. 1). 3: posterior excision of sternite VIII deeper (Fig. 4); aedeagus approximately 1.7 mm long, shaped as in Figs 5-7; ventral process apically dilated (ventral view). Ancash.................................................................. B. glabra nov.sp.

- Larger species; body length at least 14 mm. Head with pronounced (Fig. 23), pronotum with shallow microreticulation (Fig. 24). Pronotum less slender, approximately 1.15 times as long as broad, and parallel-sided (Fig. 22). Elytra with pronounced microreticulation (Fig. 25), almost matt, and weakly dilated posteriad. 3: posterior excision of sternite VIII less deep (Fig. 26); aedeagus much larger, approximately 2.3 mm long; ventral process apically not dilated (ventral view) and shaped differently (lateral view) (Figs 27-30). Environs of Cerro de Pasco........... B. montivagans (BERNHAUER)