Synanthedon pini
Encyclopedia
The Pitch Mass Borer is a moth
Moth
A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...

 of the Sesiidae
Sesiidae
The Sesiidae or clearwing moths are family of the Lepidoptera in which the wings partially have hardly any of the normal lepidopteran scales, leaving them transparent. The bodies are generally striped with yellow, red or white, sometimes very brightly, and they have simple antennae...

 family. It is known from the north-eastern United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

.
Adults are on wing in mid July.

The larvae feed on pine and spruce species, including Austrian, eastern white, Scots and Jack pines as well as white, Norway and Colorado blue spruce. They create a large mass of pitch at the larval feeding site.
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