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Photo#568247
Leptoglossus fulvicornis

Leptoglossus fulvicornis
Tallahassee, Leon County, Florida, USA
August 25, 2011
Size: approx. 2.5 cm
10 am in my yard on a magnolia tree. I am pretty sure about my ID but please check it. BG points out that this species can be easily confused with L. oppositus. However, I do not see "(...) three white spots across the back". Also Leptoglossus fulvicornis is highly specialized on magnolia fruits.
The second image shows the same specimen together with a nymph that probably also belongs to Leptoglossus fulvicornis. It matches up nicely with the fifth instar in Wheeler and Miller, Ann. Entomol. Soc. Am. 83, 753, 1990. This one is rather pale and might have "emerged" very recently.

Images of this individual: tag all
Leptoglossus fulvicornis Leptoglossus fulvicornis

Moved
Moved from ID Request.

I think you must be right. In addition to having the dots across the back, oppositus has tibial extensions that are much larger and more deeply scalloped.

 
Thank you!
Thank you, Ken. I checked every day and discovered this adult only this morning. Despite the nice drawings and detailed info in the Wheeler paper, I still can't distinguish the other instars (and then there's the small but existing chance of another species). I guess it takes a long time to develop the needed skills for this.