Il6 P. W. WHITING AND ANNA R. WHITING. 



cornis freak 271 was definitely and strongly male, although it 

 was once observed to direct its sting toward a caterpillar. These 

 nine gynandromorphs had long male antennae. Abdomens were 

 typically female except for one anterior sternite in 246 and 247, 

 and some irregular reduction of anterior sternites in 271 (Fig. 26). 



(2) Predominantly male. Juglandis freak 144, although show- 

 ing definite and vigorous responses toward females, and for the 

 most part no interest in caterpillars, had a definite but very 

 brief female response toward the latter. Moreover it showed 

 decided negative reaction toward males attempting to mate with 

 it and inspected and pierced the cotton plug in a way charac- 

 teristic of females. It had male antennae and female abdomen. 



(3) Predominantly female. Juglandis freak 258 was pre- 

 dominantly female, reacting toward caterpillars and piercing 

 cotton plug. It seemed in general less interested in caterpillars 

 than a normal female and frequently gave flipping reactions 

 toward females, at one time mounting and attempting to mate. 

 It had female antennae, male abdomen but no testes. 



(4) Typically female. Juglandis freak 5 acted in every way 

 like a typical female. It had a female head, but a mixed ab- 

 domen. Lack of ovaries and presence of poison apparatus and 

 testes are to be noted. 



(5) Indifferent. Complete indifference of Juglandis freak 206 

 may possibly be ascribed to overdose of ether but this is unlikely. 

 Its female abdomen, one long and one short antenna, might be 

 supposed to cause conflict of tendencies resulting in failure of 

 response. Juglandis freak 32 was perfectly healthy but com- 

 pletely indifferent. It had head and first three left abdominal 

 sternites male (Figs. 22, 23, 24). It is possible that had it been 

 kept alive longer than three days it might have reacted toward 

 females, although others gave aggressive responses when much 

 younger. The indifference of brevicornis freak 275, intersexual 

 male with short antennae, mixed abdomen and normal male 

 internal organs, cannot now be explained. 



Disregarding the indifferent groups (5) as being not satis- 

 factorily explained as yet we may say that responses are con- 

 trolled by the head but that there are conflicting tendencies in 

 certain instances. 



