IO4 P. W. WHITING AND ANNA R. WHITING. 



Freak 144. A female of original I. stock crossed with a male 

 from the third generation of I. by L. stock 5 produced besides 

 77 males and 180 females a gynandromorph, freak 144, found in 

 vial a (November 29, 1922). Eyes were black as were those of 

 its parents; head was male, twenty-two joints in each antenna; 

 abdomen was entirely female, poison apparatus present, seminal 

 receptacle devoid of sperm. 



Freak 144 is of especial interest from the point of view of its 

 responses. These may be described by days as the tests were 

 made. 



November 29. A.M., etherized. P.M., reacted indifferently 

 toward caterpillars. Reacted negatively to male that tried to 

 mate with it, turning abdomen down. Flipped wings and chased 

 male but did not mount. Acted similarly toward female. 



November 30. Showed very skillful cleaning reactions of 

 antennae, wings and legs. Displayed no interest in caterpillars. 

 Flipped wings and mounted female as if to mate but soon desisted. 



December i. Virgin female introduced. Gynandromorph 

 showed no reaction at first. Female inspected caterpillar and 

 stuck its abdomen underneath as if to oviposit. Then gynandro- 

 morph rushed up and attempted to mate, sticking abdomen 

 down under caterpillar near that of the female. The latter, 

 disturbed, crawled away. Gynandromorph inspected caterpillar 

 with its antennae in typical female fashion for a few seconds, 

 then left caterpillar and pursued female aggressively mounting 

 again and again, and bending abdomen down as if to mate. 

 Showed no more interest in caterpillar, walking over it in- 

 differently like a male. A male, when introduced, tried to mate 

 but the gynandromorph kicked him off vigorously, bending 

 abdomen down and forward in typical female fashion. Gynan- 

 dromorph took no interest in stung caterpillar. 



December 2. Gynandromorph showed vigorous negative re- 

 action toward males which attempted to mate. Crawled over 

 males indifferently but flipped wings and mounted female. 

 Showed male indifference toward crawling caterpillar with which 

 it came into contact. 



December 3. No eggs were found on caterpillar which had 

 been left with it since November 30. Showed negative reaction 



