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[[preprinted]] UNITED STATES DEPARTMENT OF AGRICULTURE
BUREAU OF BIOLOGICAL SURVEY
WASHINGTON, D. C.

ADDRESS REPLY TO 
CHIEF, BUREAU OF BIOLOGICAL SURVEY,
AND REFER TO [[/preprinted]]

June 6, 1918.

Dr. Alex Wetmore,
El Vado, New Mexico.

My dear Wetmore:

The Cornell man to whom we sent the bird parasites was in the office the other day and has made considerable progress in identifying these specimens. He is greatly interested in them and will work upon them [[inserted ","]] more than can be said for any one else we have asked to assist us on this problem. I think it would be well to encourage him by collecting additional material if you have the opportunity. I know you are not well equipped to do the work this summer as you were when in Utah, but possibly you may have an opportunity to get something.

He suggests that better methods of preserving the specimens are desirable and the formulas he recommends are the following:

For tapeworms and flares [[?]]:
95% Alcohol................10 parts
Water......................10 parts
Formalin...................1 part

and for all sorts of roundworms a solution of:
70% alcohol containing 5% of glycerin, to be used hot if possible.

He states that the best way of collecting specimens is to wash the contents of the alimentary tract into white line tray and decant all material possible, after which the parasit[[inserted "e"]]s may be easily picked up from the bottom.