HIS 



REPORT ON THE ROCKY MOPNTAIN LOCOST 



AND OTHER INSECTS NOW INJURING OR LIKELY TO INJURE FIELD AND 

 GARDEN CROPS IN THE WESTERN STATES AND TERRITORIES. 



\?K^ 



By a. syjPACKARD, Jr., M. D. 



LETTER OF TRANSMITTAL. 



Peabody Academy of Science, 



iSaleni, Mass., April 29, 1877. 



Dear Sir : I herewith present a report on the Rocky Mountain lo- 

 cust and otlier insects injurious to the field and garden crops of the 

 Western Territories, including a few injurious species found on the Pa- 

 ciflccoast, which section of our Union is happily remarkably exempt from 

 noxious insects. I have included in the report a few forms found injur- 

 ing the timber-trees of Colorado, and described others, which, from the 

 habits of their allies in the E.istern States, will undoubtedly in future 

 years be more or less destructive. I have also introduced accounts 

 of certain eastern species which will probably from time to time be 

 transported to the Western States and Territories east of the great plains. 

 Accounts of the cotton army-worm, the northern army-worm, as well 

 as the tobacco-worm, etc., are introduced to give completeness to the 

 subject. 



My report is partly based on the results obtained in Colorado, Wyoming, 

 and Utah, while attached for seven weeks to your survey, late in June, 

 the whole of July, and early in August, 1875. I have also received assist-' 

 ance from Mr. P. R. Uhler, who, as a member of your Survey, visited 

 Colorado the same summer. My thanks are due to him as well as to 

 Mr. William N. Byers, of Denver, Colo., editor of the Rocky ]Mount- 

 ain News, for valuable information regarding the locust, and also 

 to Mr. John L. Barfoot, curator of the Salt Lake Museum, for notes 

 on destructive insects in Utah. Acknowledgments and thanks are due 

 to other gentlemen whose names are mentioned in the following pages. 



Some of the matter relating especially'" to eastern insects is taken 

 from my own notes made for a number of years past in Maine and 

 Massachusetts. I should also acknowledge the important information 

 and illustrations derived from the nine annual reports of Prof. C. V. 

 Riley, State entomologist of Missouri ; from the fourteen annual reports 

 of Dr. Asa Fitch, State entomologist of New York ; as well as Harris's 

 "Treatise on the Injurious Insects of Massachusetts." Some of the 

 facts and a largo proportion of the illustrations are taken from my 

 "Guide to the Study of Insects," published by Uenry Holt & Co., New 

 York, and from the "American Naturalist." 



In preparing the accounts of the Ilessian fly, wheat-midge, the wheat 

 joint-worm, and chinch-bug, as well as the cotton army-worm, I became 

 painfully aware of the unreliable and fragmentary nature of our knowl- 

 edge of the distribution and habits of these insects, and of the great need 

 of a systematic and thorough inquiry into their natural history. 



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