THE GENETICS OF HABROBRACON JUGLANDIS ASHMEAD 



constant indentation on the costal margin at 

 the apex. The female cannot reproduce because 

 of inability to feed from caterpillars. The 

 fused males, however, are fertile to varying 

 degrees, but they have some trouble in mating 

 because of the defective tarsi (Fig. 9). Fused 

 appears to be doubly effective in the duplex 

 state since fused diploid males have antennae 

 as short as those of the homozygous fused fe- 

 males; while in the haploid males with fused 

 antennae, the antennae are approximately the 

 same length as the antennae of normal females. 

 Two other occurrences of fused appeared in Feb- 

 ruary, 1931. These two recurrences of fused in 

 the same month are noteworthy as no fused was 

 being bred at the time. The two recurrences' 

 were moreover entirely independent (P. W. Whit- 

 ing, 1932a). 



LONG, 1 (antennae and wings). In June, 1929, a 

 number of males appeared with antennal segments) 

 elongated and distal portion of wings shortened 

 and curved ventrally (Fig. 8). Segments of the 

 legs are somewhat longer and thinner than in 

 wild-type. Males with the mutant long are of 

 good viability and fertility but females are 

 rather v/eak. 



SEMILONG, si (antennae and wings). A wild-type 

 male was treated in June, 1930, with X-rays 

 (dosage about 2280 R units) and then mated to 

 three females. One of the daughters produced 

 in her progeny six mutant males which have been 

 called semilong because of their similarity to 

 long. Semilong males are of good fertility and 

 viability. Females are also viable and fertile 



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