[Neolasioptera] cornicola. USA (northeastern). Cornus stolonifera (Cornaceae).
Lasioptera cornicola Beutenmüller 1907a: 394. USA: New York, New York, Bronx Pk & Staten I.; ST; ♂,♀,L; AMNH.

Lasioptera cornicola sp. nov.

Gall. Woody swellings on the twigs, branches or trunks on the dogwood (Cornus stolonifera [sericea]), measuring from about 6 to nearly 150 mm in length. When situated on the twig, the gall is considerably smaller than those on the larger branches and trunk. It sometimes gnarls the trunk from about one to six inches or more in length. Inside it is hard, woody, with many elongate chambers, each containing a larva.

Habitat: NY

The gall is rather common and may be found during all seasons of the year. The larvae overwinter and pupate in the galls, and the adults emerge during May and June.

...from stem chancre gall on Cornus stolonifera ...

Irregularly tapered, ridged stem swelling...Neolasioptera cornicola (Beutenmüller)

Swellings are woody, one-half to several centimeters long, and contain several yellow larvae that overwinter inside and emerge in spring. One generation occurs per year. Host: C. stolonifera...