DAMAGE BY DESTRUCTIVE LOCUSTS. 
INTRODUCTION. 
The season of 1891 was marked by widespread alarm felt at the pres- 
ence in force of several species of destructive locusts in different parts 
of the country, and particularly in the Western States. A general 
summary of these incursions was given in my annual report for 1891, 
and in this bulletin are brought together the detailed reports of the 
agents who were sent into the field and who carefully examined the 
country from which locusts were reported. 
Mr. Bruner visited portions of Colorado, Wyoming, the Dakota s. 
Minnesota, Montana, Idaho, and Utah, and also made a short trip into 
Manitoba; Mr. Coquillett confined his investigations to the State of 
California, while Professor Osborn visited the State of Kansas only. 
In addition to the localities reported upon in this bulletin Mr. Banks 
visited Texas and New Mexico, but as his report was negative in char- 
acter it need not be printed here. Professor Osborn's report has pre- 
viously been printed in Insect Life, Volume iv, pp. 49 to 56. It will 
be noticed that Mr. Bruner, in speaking of the species which I have 
always placed in the genus Caloptenus, refers to them under the genus 
Melanoplus. The question as to the value of Melanoplus as a genus is 
discussed in the first report of the U. S. Entomological Commission, 
and I prefer to hold to the older name. It will suffice, however, for the 
reader of this bulletin to know that the name Melanoplus as used by Mr. 
Bruner is synonymous with Caloptenus as used by me. 
C. V. R. 
