350 



III. SPECIMENS OF WOOD AND BORERS 



Specimens showing the borers present, or ilUistrating the nature and progress of 

 attack, are desired from as many localities as possible. Such specimens will be valuable 

 for: 



1. Piling or other wooden structures which will throw light on date of invasion 

 or rate of destruction in any locality. 



2. Invaded piling or structures giving similar information, especially in territory 

 hitherto exempt from borers. 



Specimens should be accompanied by complete data. The specimens may be of 

 two kinds: 



1. Wet specimens containing the living or undried animals. These should not 

 exceed 12 inches in length, and should be selected to exhiliit typical areas of heavy 

 destruction of the different kinds of borers. They may be from either service piles 

 and timbers or planted check timbers. Specimens should he sawed and split out with 

 care and placed promptly in formalin (or formaldehyde) in a tub or pail. Formalde- 

 hyde can be obtained at any drug store and comes of a strength of approximateh- 

 40 per cent. A dilution to about 1 part formalin (as purchased) to 20 parts of water 

 (salt or fresh) will pickle the animals in place in the wood in twenty-four hours. The 

 sample may be left indefinitely in the formalin without harm. For shipment the 

 sample may be wrapped while wet in a heavy covering of newspapers and shipped 

 promptly, preferably in a tin or other tight box. 



2. Dried sections not exceeding 18 inches in length, with invading borers dried 

 in place, or their shells, whenever possible. Specimens should be protected for shipping 

 by wrapping with burlap or a heavy covering of paper and suitably boxing them. 

 Specimens of this kind have a great deal of value, if properly prepared and protected, 

 and should not be neglected, especially when wet specimens containing the living 

 animals are not available. 



All specimens for the determination of the borers at work in each locality should 

 be sent by parcel post or express, prepaid, to Professor C. A. Kofoid, East Hall, 

 University of California, Berkeley, California. 



IV. RECORDS OF PILING OR OTHER STRUCTURES ATTACKED BY 

 MARINE BORERS IN SAN FRANCISCO BAY OR TRIBUTARIES 



Authentic records giving the essential information in regard to past developments 

 in borer infestation will be invaluable. Such records like the specimens, will be valuable 

 for either: 



1. Piling or other wooden structures which will throw light on the date of invasion 

 or rate of destructionTn any locality. 



2. Invaded piling or other structures, giving similar information, in territory 

 hitherto exempt from borers. 



Bulky reports, or other documents, 'i^hich it is not feasible to copy. If by an>- chance 

 },ou have an extra copy which you can forward to the U. S. Forest Ser\ice, Ferry 

 Building, San Francisco, California, attention of Mr. C. L. Hill, do so. If you have 

 no such extras, please send to Mr. Hill a list of the reports which you have, with brief 



