THE GENETICS OF HABROBRACON JUGLANDIS ASHMEAD 



one or both antennae and is often imperfectly 

 developed. The trait occurs in a large but 

 variable proportion of the individuals of a se- 

 lected strain. (Discarded) 



LEGLIKE, Ig (antennae). In April, 1933, males 

 with leglike antennae were found in the progeny 

 of a heterozygous female. Leglike is a much 

 more extreme deviation than antennapedia. The 

 entire antenna, except for the two basal seg- 

 ments, has been changed so that the grooves for 

 the sensillae are absent and yellow color simi- 

 lar to that of the legs has replaced the black. 

 Fusion of several segments distal to the two 

 basal segments and swellings on the resulting 

 mass suggest the malformed tibiae of certain 

 types of inviable pupae (to be described later). 

 The foot is provided with tarsal claws, aroli- 

 um, and calcanea similar to a foot from the 

 normal position. Leglike could not be repro- 

 duced because the males would not mate, and no 

 sisters were produced. (Discarded) 



ACIFORM, ac (antennae and female genitalia). 

 In December, 1932, two sons of a wild-type fe- 

 male were observed to possess antennae with 

 segments of the terminal half much reduced in 

 diameter (Fig. 8). The mutant type males are 

 of normal viability. Gonapophyses of females 

 are much shortened, and the sting is usually 

 defective; so that the females are sterile, 

 failing to sting and feed on active caterpil- 

 lars. The antennal character is easily distin- 

 guished, since the basal nine or ten segments 

 are normal, but the terminal segments are much 



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