GORGAS MEMORIAL INSTITUTE OF TROPICAL AND PREVENTIVE MEDICINE, iNCORPORAT 
EXECUTIVE OFFICES: WASHINGTON, D. C., 1835 EYE STREET, N. W. 
GORGAS MEMORIAL LABORATORY 
APARTADO 1252 
PANAMA, R. DE P. 
Office Of The Director 
20 J anuary 1950 
TELEPHONE: PANAMA, NO. 20< 
Dr. A. Wetraore, Secretary, 
Smithsonian Institution, 
Washington 2 5, D. C. 
Dear Doctor Wetmore:- 
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‘ ■ * > -'i t ' i 
i - i 
j ja;; m isso 
Manias 
"f—~1~r rT)gi 
Your letter of January 10 arrived the 12th. We 
had hoped to use Ratibor Hartman the last half of February on our 
trip to Rio Mono, Darien, where black spider monkeys are said to 
be abundant near the boundary of Colombia but we will manage to turn 
him over to you for the period you have indicated. 
We re turns d last night from Coiba Island penal 
colony after a stay of eleven days. We took 39 black howlers and 1 
cebus. Three or four cf the howlers had faint lemon colored spots on 
the distal few inches of the tall and one had a white foot. Plenty of 
howlers and white face monkeys but no other species. Tell, you more 
about it when you arrive. 
Sincerely yours, 
*266/1* (LQJLr0 
''Herbert G. Clark. 
