Vol. XXVli] ENTOMOLOGICAL NEWS. 75 



It was about this time that the normal green male began 

 to languish and show signs of enfeeblement in his movements 

 from loss of vitality, and I introduced another wild green male 

 in the cage on September 10. This second male was a fresh- 

 appearing vigorous individual, caught in the vicinity of Lake- 

 side, and he superseded the first male which died two days 

 after this second male was placed in the cage. These two males 

 were distinguishable by the hind tibiae. In the first male they 

 were brownish, while in the second one they were green, other- 

 wise they were quite alike in color. The second male lived 

 until October 17. In the meantime the female proceeded to lay 

 her eggs on the morning of September 15, and also on the i6th 

 and 27th. 



At intervals the cold weather affected the pink katy-did, but 

 she showed much more vitality than either of the males. On 

 November i, a frost occurring in the night so paralyzed her 

 movements that I decided to remove her indoors to another 

 small cage ; the original breeding cage bearing the eggs being 

 placed at the same time within my large screened insectary, 

 where it was secure from molestation. After the female was 

 put in the new cage she again oviposited on the evening of 

 November 3, at Lakeside, also once more after I removed her 

 to Chicago on the 8th, so that between the latter date and 

 November 14, the time of her death, she had not been with 

 the male since October I7th. During the entire time, she 

 probably laid in all about thirty eggs, almost all of which I 

 verified by marking the sites. 



UNEXPECTED TIME REQUIRED IN HATCHING THESE 1912 

 EGGS ; SOME OF THIS BATCH Two YEARS, 



OTHERS THREE YEARS I.N HATCHING. 



These katy-did eggs were, of course, subjected to open out- 

 door conditions. It was natural to expect that as they were 

 laid in the autumn, they would hatch the coming spring, such 

 as occurs in Acridiidae for instance. At least, I first went on 

 this assumption as there was no literature on the subject. I 

 looked in vain in my insectary for the young katy-dids to 

 emerge from these eggs laid in 1912, throughout the following 



