I looked up the word midges because I've never heard of them being an insect that attacks plants. Wikipedia says there are a variety of flies called midges, including no-see-ums and other biting flies that feed on blood. Nothing about them attacking plants. So what do these midges do to your tomatoes that you consider a problem?

nothing to my tomato plants so far, but I found them crawling all over my other plants. apparently the larva can cause swelling in areas of plants, with certain types of midges. I also know that there is some that attack the buds of tomato plants, at least in hawaii lol. but my tomato plants arent budding yet... I found it difficult to find information on what they do to plants so I was just curious. the weird thing is that the midges are all gone now but there is dead ones all over the tomato plants and I know that tomato plants are a part of the nightshade family so I was just curious if the tomato plants poisoned them? I was more concerned about my other plants but I tried googling this with no results. my tomato plants are healthy as heck right now which is pretty awesome because I am a first time grower. they are actually almost to healthy... they are growing like crazy and I have so many!! they are of the Tigerella variety.

Could these be fungus gnats, aka fruit flies? They like the damp soil of houseplants. This year, for the first time, I found some in the hairs of my tomato seedlings' stems.

http://forums.gardenweb.com/forums/load/tomato/msg0316540831177.html

http://www.hort.uconn.edu/ipm/greenhs/htms/fngnatser.htm