Hickory Sticky Ginger Jar Gall Midge

Caryomyia viscidolium

Caryomyia viscidolium is a gall-making midge in the family Cecidomyiidae.
Hickory Sticky Ginger Jar Gall - Caryomyia viscidolium These look like Caryomyia viscidolium, but that species generally occurs on the uppersurface of hickory leaves. These were on the undersurface. So, I'm seeking confirmation for this ID.

Habitat: Hickory leaves 
https://www.jungledragon.com/image/88249/hickory_sticky_ginger_jar_gall_-_caryomyia_viscidolium.html
https://www.jungledragon.com/image/88248/hickory_sticky_ginger_jar_gall_-_caryomyia_viscidolium.html
https://www.jungledragon.com/image/88247/hickory_sticky_ginger_jar_gall_-_caryomyia_viscidolium.html Caryomyia,Caryomyia viscidolium,Geotagged,Hickory Sticky Ginger Jar Gall,Hickory Sticky Ginger Jar Gall Midge,Summer,United States,gall,hickory gall

Habitat

Hickories (Carya sp.)

References:

Some text fragments are auto parsed from Wikipedia.

Taxonomy
KingdomAnimalia
DivisionArthropoda
ClassInsecta
OrderDiptera
FamilyCecidomyiidae
GenusCaryomyia
SpeciesCaryomyia viscidolium