Microsoma exiguum is a species of fly in the family Tachinidae. It is a parasitoid of Sitona.

Distribution British Isles, Czech Republic, Hungary, Moldova, Poland, Romania, Slovakia, Ukraine, Finland, Sweden, Bulgaria, Croatia, Greece, Italy, Portugal, Slovenia, Spain, Turkey, Austria, Belgium, France, Germany, Netherlands, Switzerland, Japan, Iran, Israel, Palestine, Russia, Transcaucasia.

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