Vol. XXvii] ENTOMOLOGICAL NEWS. 73 



a number of facts relative to the life history of Amblycorypha 

 oblongifolia which were apparently not recorded in the liter- 

 ature. It is expected that with the further breeding experi- 

 ments now contemplated, the factors of heredity, or gameto- 

 genesis, can be more definitely suggested, in spite of the re- 

 markably long period required in hatching the eggs. 



SOURCE OF MATERIAL FOR EXPERIMENT; THE ORIGINAL PINK 



FEMALE. 



In the summer of 1910 Miss Nettie Isom, a resident of Ken- 

 ilworth, Illinois, offered her assistance in obtaining a live pink 

 katy-did for crossing and study, and it was due to her two 

 years' vigilance that she finally succeeded in capturing one of 

 these insects for me on July 14, 1912. l I received the living 

 insect two days later, July 16, at my summer quarters at Lake- 

 side, Michigan. Miss Isom reported in a letter that the pink 

 katy-did was found on a currant bush at Kenilworth, and in 

 the two days she had it in captivity "it had grown and changed 

 remarkably," and I infer from this statement that the insect 

 probably molted. On its arrival it was immature, in fact 

 it was a nymph in the instar just preceding the adult stage, 

 and it belonged to the species known as Amblycorypha oblongi- 

 folia. It was colored an exquisite rose-pink or diluted crimson 

 above, with the underside of the body much paler. After 

 the seventeenth day of its confinement in the cage, it molted 

 August 2, during the night, transforming into an adult. Im- 

 mediately after molting it was quite pale or blanched, as is 

 the case with molting insects, but by the next day it was 

 nearly the same beautiful shade of pink that it was before the 

 final ecdysis, excepting that in addition to the pink some small 

 dark spots appeared in the adult stage on the now unfolded 

 first pair of wings. The hind tibiae were shaded dark, and 

 slight traces of lines of pigment occurred on each side of the 

 thorax. It is this female pink katy-did that forms the basis 

 of the following experiments. 



idea of crossing a pink katy-did with the ordinary green form 

 presented itself as long ago as 1893. In the autumn of that year I 

 found an adult pink female oblong-winged katy-did at Kenilworth 

 while looking for Orthoptera, but it was unfortunately lost. 



