June, '22 horticultural inspection notes 257 



the province of Ontario. Amendment No. 15. Prohibiting the importation of 

 certain plant products from those areas in the United States infested by the European 

 Corn Borer, unless the same are accompanied by a certificate of inspection. Amend- 

 ment No. 1 6. Prohibiting the importation of potatoes from the countries mentioned 

 under subsection (a) of section 7 of the regulations; as well as from the states of 

 Pennsylvania and West Virginia on account of the potato wart disease. Amendment 

 No. 17. Prohibiting the importation of alfalfa hay from those areas in the United 

 States infested with Alfalfa Weevil. Amendments number 14 and 16 were passed 

 upon the recommendation of the Division of Botany and will be administered in 

 co-operation with that Division. 



It has been determined as a result of the inspection of express, mail, and freight 

 shipments containing nursery stock from various states by Messrs. L. L. Spessard 

 and H. L. Sanford, inspectors of the Federal Horticultural Board located in Wash- 

 ington, D. C, that a number of the nurserymen have been making it a practice to 

 utilize invalid certificates, some of which are a year or more out of date, others which 

 do not indicate the date on which the certificate becomes invalid, and in many 

 instances, certificates which have been corrected. These irregularities have been 

 brought to the attention of the various state officials responsible for the certification 

 of the plant material in question. The above applies to practically every state for- 

 warding plants in any numbers to Washington, and it is therefore probably safe to 

 assume that invalid certificates are being used in a very large percentage of the 

 states. This is a matter which should receive the attention of all state oflScials 

 certifying stock for distribution. 



Figures recently compiled indicate that 97 foreign shipments of plants have been 

 found to be infested with one or more nests of the Brown-Tail Moth from August 20, 

 1912 up to and including April 22, 1922. These interceptions were as follows: 

 France 95 (Apple 27, Cherry 9, Crataegus sp. 1, Crataegus oxyacantha 1, Crataegus 

 flora 1, Cydonia oblonga 10, Fruit stocks 14, Pear 11, Purple barberry 1, Cotoneaster 

 2, Fagus sylvatica 1, Rose 6, Plum 3, Pinus mughus 1, Primus pissardi 1, Sorbus 

 aucuparia 1, Unknown plant 5); Holland 1 (Fruit seedling 1); Ireland 1 (Rose 1). 

 The number of species of insects and plant diseases intercepted on introduced plants 

 from the eight principal exporting countries from August 20, 1912 up to and including 

 April 22, 1922, follows: Belgium — Insects 73, Plant Diseases 18; England — Insects 

 104, Plant Diseases 4; France — Insects 153, Plant Diseases 17; Germany — -Insects 

 25, Plant Diseases 4; Holland — Insects 167, Plant Diseases 31; Ireland — Insects 21, 

 Plant Diseases 0; Japan — Insects 214, Plant Diseases 29; Scotland — Insects 14, 

 Plant Diseases 0. 



Two Mealy Bugs Found in Ant's Nests. Pseudococcus longisetosiis Ferris. This 

 mealy bug was first found associated with ants in San Mateo County, California by 

 Mr. Ferris of Stanford University who described it as a new species. He also found 

 it near Stanford University on the underground stems of Castilleia joliolosa, and 

 Orobanche tuberosa and from the roots of Artneria vulgaris near -Pacific Grove. The 

 writer recently found this mealy bug associated with ants on roots of Poison Oak, 

 (Rhus diversiloba) in Niles Canyon. 



Phenacoccus colemani Ehrh. was described from Rubus sp., near Palo Alto, 

 California and has been found associated with ants near Stanford University. Dr. 

 E. C. Van Dyke found this species associated with ants near Redwood Peak, Ala- 

 meda County. The writer found the same mealy bug on Cypress Ridge, Marin 

 County, where it was associated with ants under rocks and feeding on grass roots. 



J. F. Lamiman 



