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Photo#1268251
Redheaded Pine Sawfly? - Neodiprion lecontei

Redheaded Pine Sawfly? - Neodiprion lecontei
Sand Lake Road, Kalkaska County, Michigan, USA
August 1, 2016
Size: approximately 1 inch
These were found at research sites last year on older trees. This year, they have begun to infest our study trees. We believe these are redheaded pine sawflies but I would like confirmation. They tend to either rear up or curl tightly when disturbed. They are soft, very prolific, and have greenish guts. They have completely defoliated many trees leaving behind a large amount of excrement at the base.

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Species ID: Neodiprion lecontei
Definitely N. lecontei. Light-spotted morph is common in lake states (other areas have larvae with more pronounced spotting).

 
Please tell
how to distinguish this morph from the Zadiprion rohweri?

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Diprionidae
let me not yet clarify the species, but just sort them to the family Diprionidae.

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