Description
Lucilia illustris is 6–9 mm in length. Its bucca (cheeks) are colored black with slightly gray pollinose and black hairs. The first segment of the antenna is black; the second generally orange-tipped, and the third segment is about three times the length of the second segment and colored a dark brown or black. The arista (a bristle on the antenna) is dark brown or black, and has cilia that are dark and long. The back of its head is black and there are three to four rows of black cilia behind the eyes.
A metallic blue-green thorax reflects bronze and purple. In some lights, silvery pollen appears on its back, as well as a dark line that extends along the back. Black setae can be found on both the propleuron and the hypopleuron, with brown setae on the prosternum. There are dark brown or black sclerites located at the wing-base, as well as dark brown or black found on the spiracle. L. illustris has black legs, translucent wings, and does not have a costal spine.
The abdomen has similar coloring to the thorax, but looks slightly white in certain lights. The first segment of the abdomen has metallic and dark brown coloring. The second segment has a slight indication of a spot in the middle of the back on the front margin, as well as a row of hardly apparent bristles along the margin. The third and fourth segments both have long upright bristles, but the fourth segment's hairs are scattered and also includes a marginal row of bristles.
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