Lonchaeidae
A family of about 500 described species in the suborder Brachycera (Diptera), commonly known as lance flies. The adults have blue-black, metallic bodies and they usually occur in wooded areas. The larvae are mostly phytophagous; some are agricultural pests, especially in the Neotropics. Others feed on fungi, dung and a few are predatory.
Reference
MacGowan, I. and Freidberg, A. 2008. The Lonchaeidae (Diptera) of Israel, with descriptions of three new species. Israel Journal of Entomology 38: 61–92.
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