GYNANDROMORPHS IN HABROBRACON. 



95 



wrinkled and defective is uncertain. Probably W and D n 

 remained in the egg as evidenced by the flat wings and normal 

 r 4 vein of the specimen. In this case the first division may have 

 been either reductional or equational for these factors. 



Freak 154. -A black female heterozygous for orange, set with 

 two orange brothers from mixed stock (I. x 5) produced males 

 1 6 black and 17 orange and females 18 black and 26 orange, 

 besides a male, freak 154, with ocelli and right eye orange, left 

 eye mixed. (February, 1923.) Figs. 3 and 4. 



FIGS. 1-8. Dorsal and ventral views of heads of mosaic-eyed males of Habro- 

 bracon juglandis, showing distribution of black and orange elements. X 29. 

 I and 2, freak 185. 3 and 4, freak 154. 5 and 6, freak 256. 7 and 8, freak 264. 



Matings with nine orange females resulted in 664 orange 

 males and 598 black females. Only black was therefore trans- 

 mitted. Maturation of the egg producing this mosaic may be 

 represented as follows: 



First polar body Oo 



Cleavage nuclei 0\o 



Italics are used to denote origin of gonads. 



Freak 185. A defective (grade 2) sooty male of mixed ancestry 

 (L. stocks 5, 6, 10, and I. stock n) arose from a line lacking 

 duos but having at least one minor factor, d x , causing a small 

 proportion of defectives to appear. This male, Os n d x , was 

 crossed to a female of L. stock 5, oS n D x . A black-eyed virgin 

 daughter produced males type 45, defective 3, sooty 46, de- 

 fective sooty 4, orange 43, orange defective 2, orange sooty 42, 

 and in vial e a mosaic male, freak 185 (May, 1923). 



Eyes and ocelli of this mosaic were mixed black and orange 

 as shown in Figs, i and 2. Internal and external genitalia were 

 7 



