Macrocera sp.

A small fly, about 1/4 inch (6 mm) long with very long antennae, brown thorax and slender abdomen banded with dark brown and cream colors. This male has a more slender abdomen than the female and has what appears to be a clasper on the end of the abdomen, perhaps used for mating.


Predatory fungus gnats, in general, are common in our environment. They are not often seen because they are small and are active during late afternoon and nighttime hours. They inhabit damp, dark places in forests, often under bracket fungi. The individual shown here was photographed in early June 2014 when it was attracted to lights set up to attract moths.


The larvae of Predatory Fungus Gnats (click here to see one) are worm-like creatures that inhabit dark, damp places and are predaceous. They spin hygroscopic webs (webs that absorb moisture) to collect small invertebrate prey. They kill their prey with acid fluid (oxalic acid) deposited in droplets on their web.


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