HAWK-MOTHS OF THE VICINITY OF NEW YORK CITY 29 
44. Smertnthus geminatus. 
A common species in this vicinity. It is double-brooded, the 
first brood appearing in June and July, and the second in August. 
The moth varies from light to dark gray on the fore wings. 
Found from Canada to Virginia and westward to Iowa.-~ The 
caterpillar feeds on willow, poplar, plum, apple, elm, ironwood, 
hazel, hornbeam, birch, ash etc. Enters the ground to pupate. 
45. Smerinthus excecatus. 
Common in this neighborhood. Double-brooded, appearing 
in June and July and again in August. It is found throughout 
the eastern United States and Canada. The caterpillar feeds on 
cherry, plum, apple, pear, raspberry, rose, elm, oak, hazel, horn- 
beam, ironwood, birch, willow, poplar, ash etc. Enters the 
ground to pupate. 
