Synonyms and other taxonomic changes
Identification
Very hairy on abdomen —hair often poking out prominently from under the elytra.
Species identification requires close examination. Range info can be useful. Two inormal groups:
Pronotum brown or black, elytra brown/black center, white stripes along sides:
assimilis —mostly northern and western;
affinis —similar to
piger but elytral intervals 2 & 4 shiny, with scattered large punctures, look same as slightly elevated and convex intervals 3 & 5, and
pygidium distinctly and closely rugose;
piger —like
affinis but intervals 2 & 4 finely and densely punctate, less shiny than distinctly elevated intervals 3 & 5; pygidium medially distinctly setose, noncretaceous surface with irregular rugae usually separated by ≤0.2 mm in median area;
rufobrunneus —very brown, FL endemic;
texanus TBA
Pronotum green, elytra brown to green in varying degrees, with no or weak white bars:
bibens —elytra brown with green tinge, flies in mid-late summer;
lunulatus —elytra brighter green than in
bibens, flies in late spring and early summer [overlooked in
(3)];
viridans TBA
Range
Nearctic genus (US and adjacent Canada)
(1):
T. affinis se. Canada to FL‒AL;
T. assimilis - Canada; n. & w. US (ME‒ID‒NM‒AZ);
T. bibens e. US (NY‒MI to n.GA‒AL);
T. lunulatus se. US (MD‒FL to OK‒TX);
T. piger Canada; e. US (ME‒NE to FL‒AZ);
T. rufobrunneus FL;
T. texanus KS‒TX‒NM;
T. viridans Canada; upper midwest (MI‒WI‒KS)
Range maps:
Habitat
Larvae in rotting wood
(4), adults visit flowers (Queen Anne's Lace, New Jersey Tea, Hydrangea, Dogwood, Indian Hemp…)
Print References
Hoffman C. (1935) The biology and taxonomy of the genus
Trichiotinus (Scarabaeidae-Coleoptera). Entomologica Americana 15: 134‒209 (
Full text)
