488 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 84 



gress of Entomology. He remarked to me that it would seem as 

 though the Hamburg Institute for Tropical Medical Research had no 

 longer a very good excuse for existence, since Germany had lost all 

 of her tropical possessions. 



I did not know Dr. A. Hase, of the Biologische Reichsanstalt in 

 Berlin, until 1927 when I called on him in Berlin and talked over 

 some questions relating to the parasites of injurious insects. I met 

 him later the same year at the Zoological Congress at Budapest. The 

 one big piece of work relating to medical entomology that was done 

 by Doctor Hase was his lengthy and very careful study of the body- 

 louse carried on during the war and after the louse had been proved 

 to be an agent in the carriage of typhus fever and the modified form 

 of typhus known as trench fever. Hase's is the best study of this 

 insect that has been made. He is a well trained man, an enthusiastic 

 worker, fertile in ideas and in the invention of new methods. 



In the early part of the century I had the pleasure of meeting 

 Dr. Carlos Finlay of Habana, the man who first conceived the idea 

 that yellow fever is carried by the mosquito then known as Culex 

 fasciatus and now known as Acdcs acgypti. Doctor Finlay spoke little 

 English. He was a man of medium height, well filled figure, a little 

 past middle age, rather slow and deliberative in his manner, and 

 obviously a thinker. The occasion was one of the Pan American 

 Medical Congresses held in Washington. In attendance at this con- 

 gress also was Dr. Juan Guiteras, a Cuban educated in the States 

 and before the Spanish War a lecturer at the Medical College of the 

 University of Pennsylvania. In 1904, returning by steamer from 

 Mexico, I visited Habana and called on Doctor Guiteras at the Las 

 Animas Hospital. It will be remembered that Doctor Guiteras took 

 up the work with mosquitoes and yellow fever the year after the 

 Army Yellow Fever Commission left Cuba, and carried on a series of 

 experiments confirmatory of the conclusions reached by Reed, Car- 

 roll, and Lazear. As it happened, the steamer stopping at Habana 

 ahead of ours in 1904 had come from Tampico, and a case of yellow 

 fever had been found on board. Instead of becoming excited over 

 the finding. Doctor Guiteras had the patient taken from the vessel 

 and carried into the heart of Habana and put in the hospital, realizing 

 that, if protected from mosquitoes, the disease could not be conveyed. 

 Pie showed me the patient (a man of 40), and showed me his abdo- 

 men especially, to prove that there were none of the roseola spots 

 of typhoid, and, since both the room and the bed were screened, we 

 had no fear whatever of contagion — a striking early cfifcct of the mos- 

 quito transfer demonstration. It is perhaps worthy of remark that 



