| Size (cm): |   |
| Locality: | UK Great Britain & N. Ireland |
| Sex: | larvae |
| Date: | |
| Reference: | Pinder, A.C. |
| Remark: | Stage 1 - free embryos (with yolk sac). 4.0mm specimen shows vertical band of dark pigment behind the head. This band becomes broken in older free embryos. Permission to use photos given by Dr Roger Sweeting of FBA. |