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unknown beetle - Eucinetus haemorrhoidalis

unknown beetle - Eucinetus haemorrhoidalis
Minot, Ward County, North Dakota, USA
August 15, 2008
Size: 3 mm
Lindgren trap


How are some of these Eucinetus being identified as E. haemorrhoidalis? According to Downie and Arnett, the characteristic in the key that separates haemorrhoidalis (terminalis in the lit) from strigosus is red-tipped elytra on haemorrhoidalis. Is this based on range? Strigosus and haemorrhoidalis are both known from the northeast. If haemorrhoidalis sometimes lacks that coloration, can a colorless haemorrhoidalis be separated from strigosus in an area where the species overlap? Maybe some other characteristics are helpful when a specimen lacks the coloration typical of haemorrhoidalis..? Thanks!

Moved from Eucinetus.

Lingren trap.
Would you mind showing an image of a Lingren trap, so folks know what one looks like, and how it works? Thanks, we might all rush out and get one given what cool beetles you are finding:-)

Funnel - can be purchased from BioQuip or directly from Pherotech

Thanks Phil
I apologize for the misspelling. I think I have fixed them all. The traps have been quite productive for a lot of little things, I have two at each of twelve sites in town, one with ethanol lure and one with Alpha-pinene from Pherotech International. It was also surprising what interesting things came in to the manuka oil EAB sticky traps.

Eucinetus sp.

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