Doctor Fly, so called by Belizians because if one bites you, you'll most
likely end up at the doctor's offce for a shot! They are more commonly
known as the Yellow Fly. These are nasty biters and you will end up with
anything from a small reaction like that of a mosquito bite to a severe
reaction with a painful swelling several inches long.
ferrugatus (Fabricius), is the "true" yellow fly. It is a predominantly
yellow fly about 1 cm (3/8 inch) long, similar in appearance to a deer
fly (Chrysops). The fore legs are predominantly black, the other pairs
yellow. The wings are clear, with black stigma, yellow costal cell, and
a prominent brown patch at the apex. The eyes of the live fly are brilliant
blue- green, with two semicircular purple bands. The female can be distinguished
from deer flies by the very narrow frons (space between the eyes in front),
and (in both sexes) the brown wing patch at the apex, rather than across
the middle of the wing. The abdomen is yellow, black- haired on the sides,
but with a broad yellow-haired stripe down the middle.