Synonyms and other taxonomic changes
Amphiareus obscuriceps (Poppius, 1909)
Cardiastethus obscuriceps Poppius, 1909
It looks similar to Lasiochilus dorsally but A. obscuripes tends to be more glossy across the hemilytra, and with Lasiochilus the hairs on the pronotum and hemilytra appear to be more erect and abundant. (comment by Steve Paiero)
Yellow-brown coloration, with the head and pronotum noticeably darker
Corium smooth, impunctate.
3rd and 4th antennal segments slender.
Ostiolar channel directed backwards with an anteriorly curved carina.
Clavus with raised, tri-lobed setal bases; setal bases on apical part of scutellum multi-lobed.
Male parameres sickle-shaped.
Native to Asia, recently introduced to North America (now widespread in e. US and ON)(1)
and Europe (1987)(2)
Henry et al 2008 reported it from ON, CT, DC, GA, IL, MD, NJ, NY, NC, OH, PA, SC, TN, VT, VA, and WV.(1)
BugGuide records add IA, IN, KY, MA, NH, RI, and WI to this distribution.
"I've seen good numbers in squirrel nests and they likely come to the lights" (comment by Steve Paiero)
Consistently associated with dead-leaf habitats, either still in the trees or on the ground, as well as brush piles, squirrel nests, and old tent caterpillar nests. Found in suburban/urban areas and woodlands.(1)
Found year-round, adults may overwinter. (1)
Feeds on other small arthropods that live in the same micro-habitats, probably including psocids, thrips, etc. (1)
Comes to lights and has been taken in Malaise traps. (1)
Earliest known record in North America is a specimen from Maryland in 1983. (1)
The other species of Amphiareus
in North America, A. constrictus
, has a more uniform yellowish-brown coloration. (1)