RK1 Wings are short and very broad and often unequal in length. The phenotype is more extreme at 25^oC. Occasionally one wing is blistered or grossly deformed. Thoracic microchaetae are irregularly distributed and reduced in number. Macrochaetae are occasionally abnormal in position or size. Eyes are smaller than normal.

Wings short and very broad, often unequal in length, more extreme at 25^oC. Occasionally, one wing blistered or grossly deformed. Thoracic hairs irregularly distributed and sparse. Occasional abnormality in bristle position or size. Eyes smaller. br^uq/br¹ is wild type. RK1.