iQ2 ENTOMOLOGICAL NEWS. [December, 



20. Sphinx lug ens Wlk. At light and over flowers at dusk; 

 not uncommon round Denver. 



21. Triptogon occidentalis H. Edw. Common throughout the 

 State; larvae frequent on Poplars of any species. I have bred a 

 great number; they are easily reared from the egg; have fed them 

 on Cottonwood, in Denver, until half grown and then brought 

 them home to New York State and gave them Willow until full- 

 grown, with no evil result. Smerinthus imperator Strecker, if 

 not a true species, deserves its name. This form is very robust, 

 and the markings very distinct and high colored. I found a full 

 grown larva on Cottonwood in August; it was very dark green 

 compared with the larva of occidentalis (of which I had at the 

 time many feeding) and larger than any I had before met with; 

 this larva pupated, and, to my surprise, produced an imago, in 

 September the same year, of the imperator form; it was a 9 

 5^ inches in extent of wings. I have a $ precisely of the same 

 stamp taken in west Colorado measuring 5^/2 inches in expanse. 

 I have a series of the ordinary occidentalis form, all selected for 

 their good size and color, and the difference between these and 

 the imperator form is obvions enough. 



22. Smerinthus geminatus Say. Rather common throughout 

 the State; the late brood has pale upper wings and the rose color 

 on under wings is very bright. 



23. Smerinthus astarte Strecker. This insect is rather common 

 on trunks of Cottonwoods and comes freely to light; it varies 

 interminably in size, coloration and outline of upper wings. I 

 have bred quite a number from the eggs, and occasionally found 

 the full grown larva on Populus angustifolia, and in confinement 

 it thrives best on that tree. 



24. Paonias exccecalus, Occasionally comes to light, but is 

 not common; all I have seen are high colored. 



25. Paonias myops. Common throughout the State, comes 

 freely to light and the larvae frequent on Choke Cherry. I have 

 not seen eastern examples so brightly colored as some I found in 

 western Colorado. 



There are decidedly two generations of the last four species 

 every year. 



The damage to the cereal crops in Canada by insects has been estimated 

 at 138,000,000. {Newspaper Entomology.} 



