36 spp. in our area, ~150 spp. total(1)
Large alticines, elytra usually striped, hind pronotal corners angular(2)
, or as Ciegler (2007)(3)
"The basal margin of the pronotum is distinctive in being anteriorly angulate near the hind angle, so that angle is set farther from the elytra than in most of the beetles," e.g.
incomplete key to spp. in(4)
, D. arizonae
Keys are based on, and designed for, collection specimens. Soon after death, however, the vivid colours begin to fade, and only black remains black.
White, yellow, red become just shades of straw or brown. Live colouration is rarely mentioned in descriptions.
New World; throughout the US & so. Canada(1)
a diverse array of plants; larvae are folivorous(1)
, most spp. feed on weeds(2)
Larvae often found together with adults on host plants(1)
Still missing in the guide as of Nov.2018:
Jacoby 1884 (all red); examples from Mexico
D. funerea (Randall 1838) (all black, resembles Kuschelina lugens);
plus striped species:
D. alabamae Schaeffer 1919 (median vitta close to sublateral)
D. balsbaughi Blake 1970 (median vitta abbreviated)
Schaeffer 1931 (old records from Colorado, may be based on mislabeled specimens(4)
D. limbicollis (LeConte 1857)
(CA, resembles D. uniguttata
D. schaefferi Blake 1934
Of some of the latter we may have images, but ID is pending.