242 Journal New York Entomological Society, [vm. vii. 



November to the following May, when it is placed in a convenient 

 situation, best still out of doors, but covered by a wire cage a foot 

 high to leave the moths room to spread. I have two such cages which 

 fit the top of the flower pot, so that one can be removed containing 

 the emerged moths and replaced by the empty one. The treatment 

 must be different for Hcterogenca s)iiirtlcffi.i. This species normally 

 spins in the cracks of the bark and if the cocoons are put in the flower 

 pot they all perish. I have succeeded with a short log fastened in a 

 wooden box with a screen top. The larvae were allowed to spin on 

 the log and the whole left out of doors over winter. The moths must 

 be mated the next night after emergence ; they emerge in the day time 

 or early evening. The females of one species i^Packardia gei/iniafa) 

 will last two or three days and mate normally after this time, but most 

 females begin to fly after the first night and are useless. The species 

 of Phobctron and Calyhia may be mated even after they have begun 

 to lay infertile eggs ; but the larvas from them, even if they hatch, fail 

 to eat or die in the earliest stages. Therefore if a male does not 

 emerge on the same day as the female, it is necessary to attract a wild 

 male. My mating cage is cubical, about one foot high, of green wire 

 screen except the bottom and back, which are of wood. The back 

 contains a large vertically hinged door, in which is a circular hole 

 about four inches in diameter, closed by a slide. The door is used to 

 place the female in the cage ; it is large enough to admit the screen 

 from the flower pot. The cage is then left in the woods where the 

 moths are known to be, with the back towards a tree or' some other 

 shadow, the front facing the wind and the slide open. I leave it thus 

 all night. As the moths fly toward the light the female does not pass 

 out through the slide, yet the male finds access, perceiving the odor of 

 the female which passes from the back of the cage with the wind. The 

 male is also retained in the cage, even if the pair separate before morn- 

 ing. 1 find this method easier and I believe cpiite as satisfactory as 

 sitting up with or without a lamp to catch the males to insert in the 

 cage (See Ent. News, III, 3). The female may be removed from the 

 cage on the following evening and placed in a glass jelly tumbler with 

 tight fitting tin top with one or more leaves. The eggs will be readily 

 deposited over the leaves and glass. In raising the larvte the following 

 points are to be noted : The eggs must be kept slightly moist, as by 

 keeping the tumbler in which they are laid closed, with a drop of 

 water now and then if the leaves tend to dry. When the larvae hatch 



