GYNANDROMORPHS IN HABROBRACON. IO3 



mounting. Introduced to females immediately afterwards it 

 gave aggressive mating responses, flipping of wings, mounting, 

 and rhythmic beating with wings and antennae. It bent the 

 tip of its abdomen downward in a futile endeavor to copulate. 

 It did not thrust out its sting. Responses towards caterpillars 

 were also like those of a typical male. Contact with an active 

 caterpillar resulted in a simple retreat. No eggs were laid on a 

 paralyzed caterpillar left with it for two days. Freak 247, 

 therefore, acted in every way like a typical male. 



Freak 206. From matings between the original I. stock and 

 L. stock 5 a certain female was isolated after having mated 

 with her brothers. Daughters were similarly isolated in five 

 successive generations. A few freak types appeared with extra 

 legs, deficient digestive tract or deformed thorax. The final 

 isolated female produced males 51 normal and 2 with antennal 

 deficiency and females 32 normal, I with left mesothoracic leg 

 and wing lacking, I with broadened thorax and an unexpanded 

 wing, i with right eye lacking, I with right wing shrivelled, and 

 I with abnormal arrangement of abdominal dorsites, besides a 

 gynandromorph, freak 206, found in vial b (May 21, 1923). 



Eyes of this gynandromorph were black like those of the 

 parents. The specimen was hungry when found, the abdomen 

 shrunken. It drank honey water and seemed active and vigorous. 

 A preliminary count showed sixteen joints in one antenna which 

 was complete, eighteen in the other which was incomplete and 

 must therefore have had at least nineteen joints originally. 

 Two days later it was noticed that segments were breaking off, 

 probably due to over-etherization. The abdomen was of normal 

 female character throughout. Ovaries, poison sac and glands 

 were normal and seminal receptacle contained sperm. 



Careful tests carried on over four days indicated no positive 

 reactions toward females or caterpillars. To the former it 

 appeared as indifferent as a female, to the latter as indifferent 

 as a male. Males were kicked off when they attempted mating. 



Since antennal "deficiency" occurred in this strain the shorter 

 antenna may have been a "deficient" male antenna. There was, 

 however, nothing abnormal in the form of the joints so that the 

 head was probably in part male, in part female. 





