THE GENETICS OF HABROBRACON JUGLANDIS ASHMEAD 



SMALL-WINGS, sv7 (wings). In March, 1933, six 

 males appeared showing a mutant trait, small- 

 wings. These were among the progeny of an Fl 

 female from a cross between a heterozygous 

 orange female by a narrow winged male. In this 

 mutant type venation appears perfectly normal 

 but wing size is greatly reduced, and there is 

 no overlapping with wild-type (Fig. 6). Small- 

 wings is of good fertility and viability. 



CREPE-WINGS, cw (wings). In April, 1932, a 

 heterozygous female produced a fraternity of 

 seven males including two with wings irregular- 

 ly wrinkled. The outer margin of the primary 

 and secondary wings is very irregular, and the 

 surface of the wings resembles crepe paper. 

 The trait is variable but easily recognized. 

 The mutant type is somewhat over fifty per cent 

 viable as compared with wild-type sibs. Fe- 

 males are of decreased fertility. (Discarded) 



DROOPY, dr (wings). In March, 1933, a mutant 

 type with wings held out and sloping downward 

 appeared. Droopy males occur in good numbers 

 but are likely to die in cocoons. They are 

 less viable when reared at 23° C. than at 30° C. 

 Droopy females try to sting the caterpillars but 

 have produced no offspring except in one case 

 when droopy males only -appeared. (Discarded) 



EXTENDED-WINGS, ew (wings). In July, 1932, five 

 males with extended wings were found. This mu- 

 tant type is easily distinguished when the 

 wasps are active, but if they are etherized 

 there seems to be no observable difference from 

 wild-type. They must, therefore, be separated 



