''Speranza argillacearia'', the mousy angle moth, is a species of geometrid moth in the family Geometridae. It is found in

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

. Its larval host is blueberry (''Vaccinium'') and another common name for it is the blueberry spanworm.https://extension.umaine.edu/blueberries/factsheets/insects/197-blueberry-spanworm/ The MONA or Hodges number for ''Speranza argillacearia'' is 6282.

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