Download full text - University of Nebraska State Museum

5. Anterior face of procoxa with short setae
on basal half, setae about half length of those
on humerus . . . . . . marginatus Fabr.
5’. Anterior face of procoxa with long setae
on basal half, setae as long or longer than
those on humerus . . . . . . . . . . . . . . . . . . . 6
6. Penultimate antennal segment with
outer edge only moderately emarginate (Fig.
94); basal segment of antennal club black or
orange; if club orange, elytron with anterior
black band crossing onto epipleuron (Fig.
84); if club black, orange elytral maculations
reduced or absent and epipleuron bicolored .
. . . . . . . . . . . . . . . . . . guttula Motschulsky
6’. Penultimate antennal segment with
outer edge deeply and abruptly emarginate
(Fig. 95); basal segment of antennal club
black. Elytron with anterior black band
reaching epipleural ridge but not crossing
onto epipleuron (Fig. 89) . . obscurus Kirby
7. Elytral epipleuron unicolorous, black or
orange . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7’. Elytral epipleuron bicolored, black and
orange (Fig. 88) . . mexicanus Matthews
8. Elytral epipleuron black . . . . . . . . . 9
8’. Elytral epipleuron orange . . . . . . . . . 10
9. Dorsal surface of elytra with long, fine,
THE CARRION BEETLES OF NEBRASKA 55
erect setae (Fig. 90). Epipleural ridge short,
extending anteriorly only to level of apex of
scutellum . . . . . . . . . . . . . . orbicollis Say
9’. Dorsal surface of elytra without long,
erect setae (Fig. 91). Epipleural ridge long,
extending anteriorly to near level of base of
scutellum . . . . . . . . pustulatus Herschel
10. Humerus covered by field of small, stout
setae that extend to base of epipleural ridge
(Figs. 85, 92). Metasternum with crescentshaped
area immediately behind each mesocoxa
that is glabrous or with sparse setae
only. Posterior edge of metatrochanter of
males with acute tooth projecting perpendicular
(dorsally) from trochanter (Fig. 96).
Females with small eyes, post-ocular bulge a
little shorter than length of eye (Fig. 98) . . . .
. . . . . . . . . . . . . hybridus Hatch & Angell
10’. Humerus with small, stout setae but
these ending well before base of epipleural
ridge (Figs. 86, 93). Metasternum with long,
dense setae immediately behind each mesocoxa.
Posterior edge of metatrochanter of
males with acute tooth recurving dorsally
(Fig. 97). Females with large eyes, post-ocular
bulge less than half length of eye (Fig. 99)
. . . . . . . . . . . . . investigator Zetterstedt
Fi g s. 76-83. Pronotum of 76, Nicrophorus carolinus; 77, N. guttula; 78, N. hybridus; 79, N. investigator;
80, N. marginatus; 81, N. mexicanus; 82, N. orbicollis; 83, N. pustulatus.