72 ENTOMOLOGICAL NEWS. [Feb., 'l6 



experiments in crossing and rearing pink katy-dids, as will 

 be noted in the sequence, is in direct refutation. The color 

 of the hybrids confirms the view that the pink coloration is 

 undoubtedly hereditary and obviously of germinal origin. It 

 would follow from this that the color is in no way dependent 

 on the food taken in the body by the individual. 



More recently a number of pink katy-dids have been found. 1 * 

 Mr. Gray of Woods Hole, Massachusetts, found a male pink 

 katy-did in the early part of the summer of 1912, and several 

 years ago a yellow form was taken. 



According to Glaser 4 who reported the latter specimens, a 

 speculative suggestion was made to him by Prof. Morgan, that 

 two factors may be involved, the presence of both of which 

 produced the pink form, the absence of one the yellow, and 

 the absence of both factors the ordinary green form. 



Up to the present time but one attempt has been recorded 

 to mate a female pink katy-did, Amblycorypha oblongifolia, 

 with a male of the green form. This experiment was attempted 

 by Wheeler, but failed completely. The reason of this negative 

 result was attributed to the fact that it was tried too late in 

 the season, or because the male may have been moribund, or 

 exhausted, before it was placed in the jar with the female. The 

 eggs laid by this insect a few days before her death were 

 thought to have been unfertilized. 



Glaser mentions in connection with the live male pink katy- 

 did found at Woods Hole, previously cited, that he intended 

 to cross it with a normal green female to find out what the 

 mendelizing characters are. But no record of the outcome of 

 this proposed experiment has appeared. 



EXPERIMENTS IN CROSSING PINK WITH GREEN KATY-DIDS. 

 The preliminary results of my experiments in crossing pink 

 katy-dids and rearing the hybrids are set forth in the follow- 

 ing account. In the course of this investigation I have noted 



3 Jpur. New York Ent. Soc. xxi, pp. 74-75, 1913 Davis reports 

 specimens of Amblycorypha oblongifolia found on Long Island, and 

 Grossbeck thought the allied species unusually abundant in New Jersey 

 during 1912. 



4 Psyche, October, 1912, p. 159. 



