7P> 



time than was the case in 1898, and the greatest distribution has been 

 in this direction. Taking the areas of the towns found to be infested 

 from year to year, we have the following table: 



Area infested, fall of — Square miles. 



1896 29 



1897. 158 



1898 448 



1899 928 



While the moth was not discovered in Massachusetts until May, 

 1897, we were able to determine the area occupied in 1896, since this 

 area of necessity was the same as that in which the hibernated cater- 

 pillars were found in the spring of 1897. For the same reason it is 

 not possible to give the area occupied in 1900 luitil a fall examination 

 is made. 



It is interesting to note that the fall inspection of 1899 showed the 

 presence of the moth at Seabrook, N. H., some 40 miles from the point 

 of its introduction. Since it has now passed beyond the borders of the 

 State of Massachusetts, any legislation looking to tlie control of the 

 insect would involve cooperation of Massachusetts and New Hamp- 

 shire. Indeed, Maine should be added to the list, for a small colon}^ 

 of the pest was located at South Berwick, Me., by Prof. F. L. Harvey, 

 as described in Bulletin No. 61 of the Maine Agricultural Experiment 

 Station. Infestation at this point was doubtless due to the transporta- 

 tion of houseBold goods from a ]>adly infested estate in Somerville, 

 Mass., at the height of the 1897 outbreak. 



ENTOMOLOGICAL NOTES FROM COLORADO. 



By Clarence P. Gillette, Fort Collins, Colo. 



Colorado is of peculiar interest from an entomological standpoint. 

 The Great American Desert lying along her eastern boixler shuts out 

 a very large proportion of the fauna of the Middle and Eastern States. 

 The mountains and barren wastes beyond her western border keep 

 back most of the fauna of the Pacific States, and the backbone of the 

 continent rising to more than 11,000 feet in places and extending north 

 and south forms an almost complete barrier to the intermingling of 

 eastern and western species within the State, except in case of those 

 which follow in the wake of civilization and which are transported by 

 man from place to place. The insect fauna, because of the barrenness 

 of a large portion of Colorado, is small in individuals, while the num- 

 ber of spetnes, because of the great variation in climatic conditions 

 and in plant life, is very high. 



These barriers to the migration of insects have been of great service 

 to the people, for many of the pests that are common through the 

 Eastern States have not yet reached us. In some instances this isola- 



