170 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 1 



and controlled, and that really it would present no danger in a cold or 

 temperate country, the Mexican government invited Mr. J. Isaac, sec- 

 retary of the Board of Horticulture of California, to come to Mexico 

 during the month of March, 1905, and we accompanied him on several 

 of his excursions. Afterwards, Mr. Isaac published a very important 

 report (California State Horticultural Commission: Report of the 

 Commissioner Appointed to Investigate the Prevalence of Trypeta 

 ludens in Mexico. Districts Affected by the Orange Worm. Na- 

 ture, Habits and Extension of the Pest. Methods Adopted for Its 

 Control. Danger to be Apprehended from its Introduction, Etc. 

 Sacramento, 1905, p. 1^8; Plates and Maps.) 



The methods adopted to control this pest have been, lately, the sub- 

 ject of a report presented to this commission by Mr. W. W. Froggatt, 

 commissioned by the British government to study the pests of the 

 fruits, and who was in Mexico, coming from Australia, during the 

 month of November of the present year. He visited Yautepec, the 

 center of the pest and also of the work of the Commission of Agri- 

 cultural Parasitology. According to Mr. Froggatt, the control work, 

 conducted by this Commission, has been efficacious and within one or 

 two years the pest will practically be of no moment. 



It must be observed that every orange leaving Yautepec for Mexico 

 or other parts, is carefully examined by skillful persons, well ac- 

 quainted with the matter, and they confiscate every fruit having 

 spots due to the sting of the ovipositor, of the fly, or bearing any 

 other sig-n of being attacked by worms. The examination is con- 

 ducted at the railroad station or in the orchards. Thus is greatly 

 lessened the danger of the worms infesting the orchards of other 

 countries, provided the shipments come from Yautepec and not from 

 other warm parts of ]\Iexic(\ 



In any case, however, the danger of infestation hy this pest is 

 rather problematical, since, according to my own observations, the fly 

 remains completely inactive during the cold days ; it is an insect of 

 the tropics, and to be able to live and multiply it requires a medium 

 temperature of at least 21 degrees. Once, it made a sporadic appear- 

 ance in the temperate climate of Guanajuato in but one orchard. It 

 lasted one year and was controlled. The following year a few flies 

 appeared, but were not given time to multiply, being attacked by the 

 same means. Since then, Mr. Duges thinks the pest has never been 

 seen any more. The same occurred in Zacatlan, in the State of 

 Puebla. The flies were seen one year on pears but have not made 

 any further appearance. 



Lately the pest was thought to infest also the Mamey {Mammea 



