SOME MEXICAN AND JAPANESE INJURIOUS INSECTS LIABLE 
TO BE INTRODUCED INTO THE UNITED STATES. 
REPORT OF A TRIP TO INVESTIGATE INSECTS OF ECONOMIC 
IMPORTANCE IN MEXICO. 
By C. H. Tyler Towxsexd, 
Temporary Field Agent, Division, of Entomology. 
LETTER OF STBMTTTAL. 
Las ('rices. X. Mex., October 31, 1S94. 
Sir: I have the honor to submit the inclosed report on my investigations of 
economic insects in Mexico, made between September 20 and October 20, 1894. 
Pursuant to your instructions, I visited most of the principal agricultural districts 
situated along the railroads over the plateau region, and also visited the ports of 
Ouaymas and Tampico. On growing crops little else was met with besides scale 
insects (Coccidae) and their enemies. These are of the utmost economic importance, 
and, therefore, were carefully collected and are all mentioned in this report, whether 
found on crops or other plants. Whenever practical, ranches and plantations of 
importance in the vicinity of stopping places were visited and thoroughly inspected; 
but when the distance was so great or the time so short as to render such trips 
impracticable the time was devoted to the inspection of all available plazas, gar- 
dens, patios, etc., in the different places visited. The idea was constantly kept in 
mind that those species which occurred in regions from which much produce was 
shipped were more likely to become imported, and inquiries were made of proper 
authorities in this regard. 
Very respectfully, yours, C. H. Tyler Townsexd, 
Temporary Field Agent. 
Mr. L. O. Howard. 
Chief. Division of Entomology. 
U. S. Department of Agriculture. 
INTRODUCTORY. 
The present report treats of such insects of economic importance as 
could be found in Mexico in the limited time at my disposal for visit- 
ing the different agricultural districts, and which stand any chance of 
being introduced into the United States. Only such regions as are 
situated along the railroads were visited, ports excepted, as from these 
only would pests be liable to reach our country through shipment of 
fruit, produce, plants, etc. Enemies of injurious insects were collected 
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