Description. Male. Length 3.3 mm, width 2.7 mm; body slightly elongate, convex. Dorsal surface shiny, lacking alutaceous sculpture. Color yellow; pronotum with black, basomedial macula wide basally, extended anteriorly 2/3 distance to pronotal apex at middle, apex deeply emarginate with yellow; elytron black with 5 small, yellow spots arranged in transverse rows of two each plus one at apex, apical spot transverse, anterior margin slightly emarginate (Fig. 363); prosternum, meso–, metaventrites black; abdomen yellowish brown. Head punctures small, separated by less than diameter, each puncture as large as 2 eye facets; pronotal punctures as large as head punctures, separated by less than 3 times diameter; elytral punctures equal in size to pronotal punctures, separated by less than 4 times diameter. Clypeus weakly emarginate apically, nearly truncate, lateral angle abruptly rounded. Eye canthus about 6 eye facets long, angled forward, apically rounded, yellow. Pronotum narrowed from base to apex, basal angle broadly rounded, anterior angle abruptly rounded, basal margin without bordering line. Epipleuron narrow, nearly flat, deeply emarginate for reception of femoral apices. Protibial flange about as wide as remainder of protibia, outer margin straight with about 8 large teeth, sponda not extended beyond protibial border. Carinae on prosternal process widely separated at apex, nearly parallel, joined just before prosternal base. Metaventrite without setal tuft. Basal abdominal ventrite without median setal tuft. Abdomen without primary pores laterally between ventrites 4–5; postcoxal line on basal abdominal ventrite straight in basal 1/3, flat along apical margin of ventrite, apex slightly extended forward. Abdominal ventrites with long, sparse pubescence, punctures on basal 3 ventrites separated by about diameter medially, becoming smaller and dense laterally, ventrites 3–5 densely punctured throughout; 5th ventrite depressed medially in apical 1/2, apical margin deeply emarginate medially, lateral angle of emargination pronounced with small tubercle bearing tuft of dense setae; 6th ventrite short, narrow, weakly depressed in apical 1/2, depression glabrous, without median tubercle, apical margin widely, shallowly emarginate, angle on each side of emargination abruptly rounded, bearing small tuft of dense setae. Apical tergite short, narrow, apex weakly emarginate, surface densely, finely punctured. Genitalia with basal lobe shorter than paramere, sides parallel, apex obliquely truncate; paramere Unm, widened apically, apex rounded (Fig. 364, 365); sipho robust, wide, curved in basal 1/2, basal capsule large, inner arm short, wide, rectangular, outer arm wide, as long as inner arm, with accessory piece, basal border deeply emarginate (Fig. 366, 367).

Female. Similar to male except head black with clypeus and anterolateral area of frons yellow, pronotum with median black area apically truncate, not reaching anterior pronotal margin, elytron lacking yellow humeral spot, mesepimeron dark brown. Genitalia with spermatheca long, slender, weakly curved, cornu slightly enlarged; bursal cap with 2 outer arms, apical strut narrow (Fig. 368).

Variation. Length 3.0– 3.3 mm, width 2.3–2.7 mm. Specimens listed above under “Other specimens” from Marcapata and San Pedro Manu have male genitalia with a somewhat elongate basal lobe, and specimens from Kosnipata Bosque Nublado have a basal lobe similar to that of the holotype, but slightly more slender

Type material. Holotype male; Peru, Dep. Huanuco, F. Sinchono, VIII-5-1947, Schunke, G.H. Dieke Coll’n. 1965 (USNM).

Other specimens. 11. Peru. Cuzco, San Pedro Manu, 1500 m, 16/ 18-VI-2006, Leg. R. Westerduijn, Montane evergreen forest; Dept. of Cuzco, Paucartambo, Kosnipata Bosque Nublado reserve, Coll. MVL Barclay, Cock-of-the-Rock Lodge, Montane Wet Forest, 1400m. iv/1999, 13 o 03’21 S 71 o 31' 44 W, M. V. L. Barclay, BMNH (E) 2001-121; Marcapata, Staudinger, Korschefsky Collection 1952. (BMNH) (GGC) (JEBC) (MDC) (MKRB) (UNMSM) (UNSAC) (USNM).

Remarks. Genitalia are the only criteria for certain recognition of this species, as is typical for much of the genus. Among species lacking primary abdominal pores, this is the largest on average, and the apical elytral spot is distinctly rectangular.

Type designation is restricted to the holotype because of variability observed in male genitalia. Entries under “Female” and “Other specimens” were obviously taken from nontype material. The series from Kosnipata, bearing identical labels, was composed of two species, S. mary and S. kimberly.