consideration of each. The portion which relates to remedies, while 
drawn up for use against the Rocky Mountain Locust, will apply in 
large part to other migratory locusts, as well as to the non-migratory 
species. Long, detailed descriptions of the various machines which were 
given in the original reports are, for the most part, omitted, in the be- 
lief that the figures themselves will be sufficiently suggestive for the 
present purpose. In point of fact, many of these machines, especially 
the more complicated, while serviceable, cannot be recommended to 
the average farmer dealing with the locust plague, and experience has 
shown that those simple forms providing for the use of coal oil and coal 
tar are, on the whole, the most efficacious against the unfledged insects. 
It is, therefore, to this portion of the bulletin that I would particularly 
call the attention of those needing the information contained in it. But 
little experience of practical value has been had since the last great in- 
vasion ; hence little has been added to this section of the bulletin beyond 
a brief description of the trapping system used in Cyprus against the 
migratory locusts of the Old World, and an account of the bran-arsenic 
mash remedy used in California in 1885 against the Devastating Locust. 
C. V. R. 
