1      Bucculae not prominantly produced anteroventrad, anteriorly forming a right or subacute angle; postfrenal part of scutellum broad, more or less broadly rounded apically, almost entirely stramineous, sublaevigate, sparsely punctured; basal angles of scutellum, each with a stramineous, sublaevigate spot, which is as large as apical spot or smaller; robust species, width of body about one-half length

2

-       Bucculae prominently produced anteroventrad into an acute or subacute process; postfrenal part of scutellum narrow, roundly subacute at apex; stramineous, laevigate spot only thinly bordering apical and lateral areas; stramineous, laevigate spot at each basal angle of the scutellum obsolete; more slender species, width of body slightly or considerably less than on-half length

5

2(1)  Head subequal in length to pronotum; first antennal segment not extending beyond apex of head; laevigate spot on postfrenal projection of scutellum generally impunctate; laevigate spots at basal angles of scutellum usually as large as apical spot; an obsolescent sulcus barely extending to caudal margin of third abdominal sternite [image of syntype]

generosus Stål

-       Head markedly shorter than pronotum; first antennal segment extending by about one-third its length beyond apex of head; laevigate spot on postfrenal part of scutellum conspicuously punctured; laevigate spots at basal angles of scutellum much smaller than apical spot; a well-defined median sulcus extending to apex of fourth or to about middle of fifth abdominal sternite

3

3(2)   Lateral angles of terminal abdominal segments only moderately dentate, those of sixth armed with a short spine; external genitalia of female broadly rounded at apices; lateral halves of propleura very deeply and thickly punctate

mesoleucus Bergroth

-        Lateral angles of terminal abdominal segments very prominently dentate and armed with rather long spines; external genitalia of female acute; propleura very sparsely and shallowly punctate, except for a small irregular patch near lateral margin

4(3)   Second antennal segment slightly shorter than basal [image of syntype]

-        Second antennal segment about one-half longer than basal

5(1)    Anterior angle of pronotum with a conspicuous ectally directed denticle; humeral angle more prominent, subacute; anterior area of pronotum broadly subconfluent with posterior; second antennal segment somewhat longer than third

-        Anterior angle of pronotum without prominent denticle; humeral angle of pronotum less salient, somewhat rounded; anterior area of pronotum more strongly gibbous, between lateral one-fourth distinctly delimited from posterior by a transverse uniserially punctate impression; second and third antennal segments usually subequal in length

6(5)   Rostrum extending to about middle of fifth abdominal sternite; median sulcus extending to base of, or midway into, fifth abdominal sterniate [image of syntype]

-        Rostrum extending to, or only a little beyond, caudal margin of third abdominal sternite; median ventral sulcus on abdomen shorter or posteriorly more obsolescent [image of syntype]