280a (279b). Either eyes, head, and thorax densely covered with setae, or scutellum largely

polished and with only 2 pairs of bristles (rare in North American collections) (Fig.A)…....... 281

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A

280b. Eyes not densely covered with setae, head and thorax occasionally so; scutellum rarely

with paired bristles, but if so there are 3 or more pairs and they are inconspicuous (Fig.A).... 282

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A