Moved from Purshivora chelifera.

Purshivora pubescens - primarily distinguished from P. chelifera by presence of white pubescence on the head and thorax (as its name would imply). Other differences are present in the wing shape and venation, as illustrated by Crawford (1) - note especially the extent of the pterostigma and vein Rs:

(left: P. pubescens; right: P. chelifera)

While wing maculation is not shown in Crawford's illustrations, both species are described as having wings brownish near the apex, but only P. pubescens is described as having additional brown maculation along the base of the media as does yours. The two species also differ in general coloration: P. chelifera is described as generally greenish-yellow, while P. pubescens is light brownish with white head and white markings on thorax. Both species occur in western North America in association with Purshia tridentata, though based on available records P. chelifera seems to have a more typical southwestern distribution (CA-AZ-UT) while P. pubescens has been recorded as far north as Idaho and Oregon. All of these factors would suggest P. pubescens over P. chelifera.

Moved from Psylloidea.

...is Bitterbrush (Purshia tridentata) in Rosaceae.