Do you have a key to the Systoechus?

Here is my working key to the genus:
1. Scutellum usually with strong red marking medially. Femora usually yellow. Yellow hairs on face, if present, shorter than dark hairs. East of the Rockies. .... 2
- Scutellum black, may have faint red spots medially. If femora yellow, yellow hairs on face as long as dark hairs. Rockies and far North. ... 4
2. Body pile pure white, face with only black pile and tomentum. .... candidulus
- Body pile yellow, face with some yellow pile and tomentum. ... 3
3. Spines on mid and hind leg black. Male with shiny patch on frons. Female with yellow scales on face short, about length of 2nd antennal segment. ... solitus
- Spines on mid and hind leg yellow. Male with frons entirely dull. Female with yellow scales on face long, about twice length of 2nd antennal segment. ... vulgaris
4. Femora dark brown in both sexes, tibia dark brown in male. Spines at base of costa mostly dark brown to black. Female with numerous dark hairs on face. Male with few yellow hairs on face. ... 5
- Femora yellow in female, yellow to dark brown in male, tibia yellow in both sexes. Spines at base of costa mostly yellow. Female with few if any dark hairs on face. Male with roughly equal proportions of yellow and dark hairs on face. ... oreas
5. Male with shiny patch on frons. Female with erect yellow hairs on frons, lateral patch of yellow tomentum on face reaching antennae medially and shiny area of oral margin ventrally. ... fumipennis
- Male with frons entirely dull. Female without erect yellow hairs on frons, lateral patch of yellow tomentum on face small, not reaching antennae or shiny area of oral margin. ... undescribed species? (NWT)