1. Marginal crenulations narrow, 20 or more per 100μm; puparium light in color....................... 2

— Marginal crenulations wide, less than 20 per 100μm; puparium light to dark in color............. 4

2(1). Peg-like tooth at the posterior border of the vasiform orifice absent; each leg with a robust spine, the spine on T 2 leg slightly large......................................................... T. packardi (Morrill)

— Peg-like tooth present or slight; T 2 spine absent......................................................................... 3

3(2). Puparium shape ovoid with posterior end narrowed; papillae conical and tips acute; posterior part of the vasiform orifice with a slight peg-like, median tooth or such tooth absent; A8 and caudal setae long with base strongly tuberculate........................................ T. eriodictyonis Russell

— Puparium shape elliptical and posterior end broad; papillae broadly conical and tips blunt; posterior part of the vasiform orifice with a strong peg-like, median tooth; A8 and caudal setae long or short but without tuberculate base............................................ T. abutiloneus (Haldeman)

4(1). Puparium dark brown to black in color...................................................................................... 5

— Puparium light in color............................................................................................................... 7

5(4) Submarginal papillae aligned closely together or in 2 to 3 irregular rows................................. 6

— Submarginal papillae in a single row and spaced well apart, not touching.................................................................................................................................. T. sp. #2 near notata Russell

6(5). Submarginal papillae aligned closely together; 3 pairs of median reniform papillae clusters (Figure 12).............................................................................................................. T. corollis (Penny)

— Submarginal papillae in 2-3 irregular rows (Figure 14), clusters absent. T. glacialis (Bemis)

7(4). Submarginal row of well-separated papillae less than 100; submedian papillae few in numbers or absent; median abdominal row of papillae absent.................. T. vaporariorum (Westwood)

— Submarginal single row of papillae adjacent or in 2-3 irregular rows; submedian papillae numerous; median abdominal row of papillae absent or present............................................................... 8

8(7). Submarginal single row of papillae adjacent, oriented toward the margin with more than 100 papillae; submedian papillae present and numerous; median abdominal row of tubercles present .................................................................................. T. pseudoblongifoliae Dooley sp. nov.

— Submarginal papillae in 2-3 irregular rows, clusters absent; submedian papillae of irregular shape present and numerous in groups; median abdominal row of papillae absent.................................................................................................................................... T. glacialis (Bemis)