Holdings for Efferia
| Species |
# Specimens |
| aestuans (L.) |
6 |
| albibarbis (Macquart) |
40 |
| anomalus (Hine) |
11 |
| argyrosoma (Hine) |
1 |
| armatus (Hine) |
1 |
| basini Wilcox |
1 |
| benedicti (Bromley) |
1 |
| bicaudatus (Hine) |
29 |
| bicolor (Bellardi) |
21 |
| californicus (Schaeffer) |
1 |
| caliente Wilcox |
5 |
| canus (Hine) |
3 |
| candida Coquillett |
5 |
| canellus (Bromley) |
19 |
| costalis (Williston) |
3 |
| frewingi Wilcox |
1 |
| harveyi (Hine) |
4 |
| pernicis Coquillett |
12 |
| pogonias (Wiedemann) |
2 |
| rapax (Osten Sacken) |
6 |
| stramineus (Williston) |
1 |
| tagax (Williston) |
3 |
| texanus (Banks) |
9 |
| willistoni (Hine) |
1 |
| zonatus Hine) |
1 |
|