GYNANDROMORPHS IN HABROBRACON. 97 



(Od II95 WD x ). There were produced type males 3, defective 

 males 23, and type females 12. One of these females produced 

 males type 1 1, defective 22, wrinkled and wrinkled defective 36, 

 orange n, orange defective 22, orange wrinkled and orange 

 wrinkled defective 28, and in vial / a male with mosaic eyes, 

 freak 264 (June n, 1924). The lack of females indicates that 

 the mother had probably not mated. 



Freak 264 had ocelli and left eye orange,, right eye black. 

 Figs. 7 and 8. Vein r 4 of right wing was normal, of left wing 

 partly defective. The excess of defective over normal brothers 

 indicates at least one minor factor for defect besides the main 

 factor d II95 . 



This mosaic was mated to four females of L. stock 10 

 (od II95 WD x ). Male offspring were as expected for stock 10, 

 orange 36, and orange defective 252. Female offspring shown 

 in Table I. were 309 orange and n black indicating mosaic 

 character of gonads. From the last column of Table I. it may 

 be seen that percentage of black increased between mating of 

 June 13 A.M. and that of June 13 P.M. (difference 3.16 i.io 

 per cent.) and again between June 13 P.M. and June 14 A.M. 

 (difference 4.18 2.08 per cent.). While these differences be- 

 tween successive periods are barely significant, the increase in 

 blacks produced with an increase in age of one complete day is 

 7.34 1.66 per cent. This may indicate that testes were of 

 different character and that the orange-bearing was functioning 

 sooner than the black. We were unfortunately unable to get 

 further matings. Had this been done it is possible that the 

 black daughters might have equaled or exceeded the orange. 

 The black daughters differed moreover in being much more 

 defective than orange. Blacks were 81.82 7.84 per cent, 

 defective with mean grade 2.818 while orange were 21.36 1.57 

 per cent, defective with mean grade 0.398. 



The eleven black daughters were all tested. They produced 

 males type 169, defective 188, orange 211, orange defective 221, 

 and females type 137, defective 156, orange 144, orange de- 

 fective 141. They were all heterozygous (D n d II95 ) indicating 

 that d II95 was in no case received from freak 264. Eighty-seven 

 of the 309 orange daughters produced males orange 1,359, 



