THE ENTOMOLOGIST. 557 



an average, smaller specimens, and were later in developing, 

 the first male appearing September 15th, against September 

 10th, on which day the first male in lot 1 appeared. Some of 

 them, however, were of the usual size. Besides these two lots, 

 which were in small vessels and very strictly watched, I had 

 a great number in a large breeding-cage, which were so 

 thoroughly neglected that fully one-half died. No accurate 

 account was kept of them, but of upwards of fifty chrysalides 

 obtained fifteen were females. This is a tough insect, and 

 will stand very rough treatment; and the last mentioned 

 were repeatedly allowed to wander around the cage for three 

 days or more without a particle of food. 



2. Orgyla leucosligma. — Started with a lot of forty, which 

 were very carefully watched and very insufficiently fed. From 

 them eighteen cocoons were obtained, ten of which were 

 actually females and eight males. 1 naturally looked for a 

 different result in this case, as there is a very perceptible 

 difference in the size of the sexes, and the female larva grows 

 one-third larger than the male, requiring, in consequence, a 

 greater amount of nourishment. I had also noticed in previous 

 rearing of this species that the males often passed through but 

 three larval moults, while the females passed through four; 

 but to show that the number may vary in the same species, 

 according to circumstances. Miss Murtfeldt assures me that 

 under this stinting process the former went through four 

 moults like the females. Similarly, Prof. Westwood has 

 informed me that a larva of Megatoma [Tiresias] serra, which 

 he once kept on flies and insufficiently fed, lived for three 

 years, and moulted no less than fourteen times. 



3. Clisiocampa Americatia. — Started with a batch of up- 

 wards of fifty just hatched. Obtained only nineteen cocoons 

 from them, the rest dying from hard treatment. Five small 

 females and nine males were obtained, the others dying in 

 chrysalis. 



4. Hyperchiria lo. — Twelve taken from Baptisia, soon 

 after the fifth or last moult. Furnished very stiutingly with 

 food. All pupated. Two male moths issued in the fall; 

 four males and three females this spring, three being yet in 

 the chrysalis state. At the same time I had two other lots 

 feeding, with ordinary care, on Sassafras and Amorpha, and 

 in both lots the males have so far preponderated. 



