Pachybrachis spumarius Suffrian 1852

Habitus 14.Dorsal habitus of Pachybrachis spumarius. Scale bar, 1 mm.

Map 14.The known distribution of Pachybrachis spumarius in eastern Canada. OR – Ottawa River.

Figure 2.Ocular lines: a present, Pachybrachis peccans b small, Pachybrachis hepaticus c absent, Pachybrachis spumarius.

Figure 5.Tibial spurs: a absent from front leg, Pachybrachis atomarius b minute on front leg, Pachybrachis spumarius c large on front leg, Pachybrachis calcaratus d small and pointed on middle legs in most species.

Figure 6.Pronotum: a reddish, with close-up of marginal bead, Pachybrachis bivittatus b mottled, Pachybrachis spumarius c with black M-mark, Pachybrachis m-nigrum d almost black, Pachybrachis nigricornis carbonarius.

Figure 7.Elytral punctures and coloration: a in rows in deep striae, Pachybrachis luctuosus b confused in basal half, in rows in apical half, Pachybrachis calcaratus c all confused, Pachybrachis hepaticus d confused and mottled, Pachybrachis spumarius e vittate with marginal vitta interrupted, Pachybrachis bivattatus f black, margined with yellow, Pachybrachis nigriconis carbonarius g entirely black, Pachybrachis luridus.

Figure 8.Pygidium: a largely yellow, Pachybrachis bivittatus b with well-defined yellow spots, Pachybrachis cephalicus c with faint reddish spots, Pachybrachis spumarius d black, Pachybrachis atomarius.

Figure 10.Aedeagus: a lateral view, Pachybrachis luctuosus b lateral view, Pachybrachis spumarius c apex, dorsal view, Pachybrachis spumarius.

Map 4.The known distribution of Pachybrachis cephalicus in eastern Canada. Carolinian Zone in dark beige.