bgreer's picture

Dark blue fly

Observed: 15th April 2011 By: bgreer
Description:

Dark (navy) blue fly. About 2cm long.Long slim abdomen. Quite long ribbed looking antennae. Transparent blue tinted wings. Appears every year in garden in spring on Jacob's Ladder plant which is then eaten by grey/green caterpillars. I assume the caterpillars are the larvae of the fly.

Identifications
Species interactions

No interactions present.

Species with which Solomon's-seal Sawfly (Phymatocera aterrima) interacts

Comments

bgreer's picture

dark blue fly

got the name of the plant wrong, it is not Jacob's Ladder it is Solomon's Seal.