| Parent | Category | Figures | |
|---|---|---|---|
| 1 | Efferia | aestuans | 409 |
| 2 | Efferia | albibarbis | 314 |
| 3 | Efferia | apicalis | 57 |
| 4 | Efferia | pogonias | 41 |
| 5 | Efferia | tabescens | 22 |
| 6 | Efferia | snowi | 18 |
| 7 | Efferia | jubata | 17 |
| 8 | Efferia | prairiensis | 14 |
| 9 | Efferia | triton | 11 |
| 10 | Efferia | slossonae | 10 |
| 11 | Efferia | rapax | 9 |
| 12 | Efferia | plena | 9 |
| 13 | Efferia | benedicti | 7 |
| 14 | Efferia | tuberculata | 6 |
| 15 | Efferia | tricella | 5 |
| 16 | Efferia | bryanti | 5 |
| 17 | Efferia | okanagana | 4 |
| 18 | Efferia | mortensoni | 4 |
| 19 | Efferia | duncani | 3 |
| 20 | Efferia | bicaudata | 3 |
| 21 | Efferia | armata | 3 |
| 22 | Efferia | quadrimaculata | 2 |
| 23 | Efferia | leucocoma | 2 |
| 24 | Efferia | nemoralis | 2 |
| 25 | Efferia | grandis | 2 |
| 26 | Efferia | femorata | 2 |
| 27 | Efferia | bicolor | 1 |
| 28 | Efferia | latruncula | 1 |
| 29 | Efferia | zonata | 1 |
| 30 | Efferia | candida | 1 |
| 31 | Efferia | bimaculata | 1 |
| 32 | Efferia | remus | 1 |
| 33 | Efferia | inflata | 1 |
| 34 | Efferia | texana | 1 |
| 35 | Efferia | wilcoxi | 1 |
| 36 | Efferia | stigmosa | 1 |