Rank: RK2 Wings lack the anterior crossvein and the posterior crossvein is reduced to a stub. Veins L3 and L4 may show slight deltas at the tips (as in cv1). Wings are spread and curved and slightly narrowed. Viability is somewhat reduced due to the tendency of the curved wings to get stuck in the food. Fertility is fair, classification excellent.
Edmondson, May 1952
Arose in: In(1)rst3 stock.