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Description

 Length: 2.2–2.6mm, width: 2.2–2.3mm; body elongate oval, weakly depressed, glabrous; dorsum metallic blue, head and pronotum greenish-blue, contrasting slightly with elytra; frons transversely elevated between antennal bases, weakly depressed behind, interocular margins strongly convergent dorsad, ground punctation fine, with few secondary punctures near vertex, frontal stria present along inner margin of eye, interrupted over antennal bases, but complete across middle, supraorbital stria absent; antennal scape short, club broadly rounded; epistoma weakly concave below frontal ridge, apical margin truncate to weakly emarginate; labrum about 3×wider than long, weakly emarginate apically; both mandibles with acute basal tooth; pronotal sides weakly convergent in basal half, somewhat abruptly arcuate to apex, weakly depressed in anterior corners, marginal stria complete along lateral and anterior margins, lateral submarginal stria absent, ground punctation of pronotal disk very fine, interspersed with small secondary punctures in lateral third; elytra with three complete epipleural striae, outer subhumeral stria absent, inner subhumeral stria present in basal fourth, dorsal striae 1-3 complete, 4th stria variably abbreviated from apex, occasionally absent, 5th stria absent, sutural stria present in about apical three-fourths, elytral disk with few coarse punctures in apical fourth; prosternum moderately broad, weakly convex, keel very weakly emarginate at base, carinal striae complete, divergent anterad and posterad, separate throughout; prosternal lobe rather short, about one-half keel length, apical margin broadly rounded, marginal stria deeply impressed at middle, fragmented at sides; mesoventrite weakly produced at middle, marginal stria interrupted, mesometaventral stria absent; lateral metaventral stria extending from near mesocoxa posterolaterad toward middle of metacoxa, slightly abbreviated, sinuate apically, outer lateral metaventral stria short, oblique, metaventral disk impunctate at middle; abdominal ventrite 1 with single lateral stria abbreviated apically, middle portion of disk impunctate; protibia weakly 4–5 dentate, outer margin serrulate between teeth; mesotibia with two weak marginal spines; outer metatibial margin smooth; propygidium without basal stria, discal punctures rather small, ocellate, denser in basal half; propygidial gland openings evident about one-fourth from anterior margin, one-third from lateral margins; pygidium with fine ground punctation uniformly interspersed with small secondary punctures. Male genitalia (Figs 19E–F, H, K, O–P): T8 slightly longer than broad, sides subparallel, more or less straight, basal emargination shallowly rounded, apical emargination shallow, narrow, subacute, ventrolateral apodemes separated by about one-half maximum T8 width, extending beneath to about one-third from base; S8 elongate, halves fused along midline, with membraneous apical velum bearing a fine but dense setal fringe, apical guides weakly developed, widest near apex; T9 with basal apodemes moderately thick, about one-third total T9 length, apices bent mediad, narrowly rounded, glabrous, ventrolateral apodemes weakly produced beneath; S9 stem parallel-sided in basal two-thirds, expanded abruptly, then more gradually to narrow, subquadrate, divergent apices, more strongly sclerotized in apical half, apical margin shallowly divided; tegmen long, narrow, widest near apex, in lateral aspect slightly thickened in apical half, very weakly curved over entire length; median lobe about one-third tegmen length; basal piece about one-third tegmen length. 

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© Michael S. Caterino, Alexey K. Tishechkin

Source: ZooKeys

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