syrphus fly

from the GNU version of the Collaborative International Dictionary of English.

• (Zoöl.) Any one of numerous species of dipterous flies of the genus Syrphus and allied genera. They are usually bright-colored, with yellow bands, and hover around plants. The larvæ feed upon plant lice, and are, therefore, very beneficial to agriculture.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Alternative form of syrphus.