Geotaxis score significantly lower than for Canton S in a Hirsch-type geotaxis maze.
Females exhibit reduced mating success.
Aristae strongly reduced. Postscutellar bristles widely separated and erect but strongly divergent. Scutellum shortened; sternopleurals irregular in size, position, and number; wings slightly bowed downward, narrowed and pointed; first longitudinal vein raised and thickened. Tarsal claws transformed into bristle-like structures or absent. RK1.
Bridges, 7th Nov. 1917.