442 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 9 



Scientific Notes 



Forest Insect Investigations (A. D. Hopkins, In Charge). S. A. Rohwer, 

 Bureau of Entomology, has recently completed a summary of the nursery connected 

 with the eastern Field Station, arranging it under the heads of "Deciduous" and 

 "Coniferous" trees. 



There are twenty-six species of deciduous trees represented in the nursery })y one 

 hundred and fifty-eight individuals. Most of these are oaks and are used in experi- 

 ments on leaf-feeding insects and gall makers. 



In the coniferous nursery there are twenty-six species represented by one thousand 

 three hundred and thirty-eight individuals. Four new conifers have been added 

 to the nursery since last report. These are Pinus scopulorum, Pinus edulis, Pinus 

 laricio, and Pinus toeda. 



Since the last report one hundred and fifty-four trees have been numbered and 

 individual observations are being kept on these trees, in connection with the experi- 

 ments with the insects. Most of these trees are Vjeing used in experiments on the two 

 recently introduced pests, Evetria buoliana and Diprion simile. 



It is noted that most of the seedlings which came from the Pacific Coast had the 

 foliage winter killed and were considerably later in commencing to grow than species 

 from other localities. An interesting comparison can be made between the two 

 plots of Pseudotsuga taxifolia. In one of these the seedlings came from Oregon and 

 every tree showed considerable winter killing of the foliage. In the other plot the 

 seedlings came from Colorado and there was no winter killing of the foliage of these 

 trees. 



Federal Horticultural Board. The fumigation of imported cotton is now 

 proceeding in Boston and San Francisco in a thoroughly satisfactory manner. In the 

 use of a substance as poisonous as hydrocyanic-acid gas in such huge quantities, 

 there is necessarily risk unless thorough-going precautions are constantly taken. 

 The existence of such risk has been two or three times demonstrated already" in the 

 work in Boston, with no serious consequences, however, other than the temporary 

 disabling of workmen. In every instance, however, these accidents have resulted 

 from carelessness and disregard of precautionary measures which have been specific- 

 ally insisted upon. It is believed that this experience will control any further tend- 

 ency to carelessness on the part of the workmen concerned. The investigation of 

 the fumigated cotton by the experts of the Federal Horticultural Board, and of the 

 Bureau of Chemistry, of this Department, has shown that after an aeration of a day 

 or two the fumes of the gas have practically entirely disappeared, and no further 

 danger from fumigated cotton is possible. 



During the month of May the following quarantines have been promulgated: 



Notice of Quarantine No. 24, on "Corn Diseases." Notice of Quarantine No. 25, 

 "Gipsy Moth and Brown-Tail Moth Quarantine." 



The corn disease quarantine prohibits the importation, in the raw or manufactured 

 state, from southeastern Asia (including India, Siam, Indo-China, and China), 

 Malayan Archipelago, Australia, New Zealand, Oceana, Philippine Islands, Formosa, 

 Japan, and adjacent islands, of seed and all other portions of Indian corn or maize 

 {Zea mays L.), and closely related plants, including all species of Teosinte {Eu- 

 chloetia), Job's tears {Coix), Polytoca, Chionachne, and Sclerachne. This quarantine 

 has some entomological importance in that, though directed against corn diseases, 



