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Knulliana cincta - Banded Hickory Borer? - Knulliana cincta

Knulliana cincta - Banded Hickory Borer? - Knulliana cincta
Tracys Landing, Anne Arundel County, Maryland, USA
May 18, 2020

Moved from Frass.


Good northern record?
Not sure if this is true frass? Even though there are published records all the way up to Southern Ontario, this beetle is uncommonly encountered outside of the deep south. There are VERY few records on BG north of MD. For example on BG: the IL and MO records are all below St. Louis; the NE record is from Indian Cave State Park which is in the extreme SE corner of the state.

Hope you don't mind I am unfrassing...
BG only has two records from a different part of the state. Maryland Biodiversity Project also has few records. The photo was helpful to MBP, and perhaps the data may be helpful to others.

If this gets re-frassed, oh well.

Early flight for a such a big longhorn...
The other thing that I find interesting about this species is that they have a very early flight, averaging about 2 months before related species of similar size being to emerge. They clearly are cold tolerant - the specimen that I posted from WV was found on a very chilly night in early May. The BG records paint an interesting picture regarding this phenomenon. In the deep South they start to appear in February and March. As you move north you see April and May records and then the latest record is June from central PA. In TX and surrounding states there appears to be a second population that has a fall emergence or perhaps some year round activity.

more northern records on BG...
When I first searched for more northern records under the "data" tab I was on the Knulliana cincta cincta page. But I see there are additional records under the Knulliana cincta page (records that are clearly the nominate subspecies, but not thus assigned are easy to miss when browsing on BG). However, the geographic pattern that I mentioned above still hold true. For example, going across the northern tier of states one can see the IA records are right on the border with MO and the NJ specimen is from Cape May. I am not sure there is enough data to say that Knulliana cincta is rare in the NE. It is possible that there is some sampling bias as not many cerambycid collectors are putting their UV lights out on cool nights in April and May when this species seem to be the most active.

Moved from Beetles.

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