macrochaeta & thorax
microchaeta & thorax
Aristae absent or much reduced. Thorax has wide bare area or groove down midline with divergent hairs and bristles; sternopleurals absent; wings have weakened L2 vein and delta at tip of L3; tarsal claws absent. Viability about 10% of wild type. RK3.
Bridges, 2nd July 1933.