Table 1: Progeny numbers and egg hatch rate for crosses within and between D. americana (NN97.4-red) and D. novamexicana (1031.4).

Female parent Number of progeny (±S.E) Egg hatch rate (±S.E.) Conspecific Heterospecific Conspecific Heterospecific D. americana 73.5 (±0.87) 23.4 (±0.33) 0.90 (±0.009) 0.36 (±0.03) D. novamexicana 69.2 (±0.44) 1.4 (±0.08) 0.97 (±0.009) 0.008 (±0.003)