| Size (cm): |   |
| Locality: | UK Great Britain & N. Ireland |
| Sex: | larvae |
| Date: | |
| Reference: | Pinder, A.C. |
| Remark: | Stage 1 - free embryos (with yolk sac), Top of head and dorsal surface devoid of pigment. Permission to use photos given by Dr Roger Sweeting of FBA. |