Cystiphora canadensis

Lygocecis packardi

Lygocecis porterae

Sackenomyia viburnifolia

Sackenomyia commota

ex blister leaf galls on *Prenanthes alba* L. or *P. altissima* L.

from irregular twig swellings of "*Salix longifolia*" (=*S. interior* Rowles)...

from twig gall on willow, I-31-1904, near Las Vegas, New Mexico

adults reared V-1909 ex purplish, fusiform, vein swellings on *Viburnum dentatum* L., Magnolia, Mass., C.H. Clark

[also comments that *Sackenomyia acerifolia*, (named after where it was swept, not reared) is "very likely" a synonym.]

reared V-5-1909, ex blister leaf gall on *Viburnum ? lentago* L., Magnolia, Mass., C.H. Clarke...This species is renamed *commota* for the excited manner in which the mature larvae of *Sackenomyia* spp. move about when disturbed.

A Review of the Nearctic Genera of Oligotrophidi with Piercing Ovipositors (Diptera: Cecidomyiidae)