02 PROC. ENT. SOC. WASH., VOL. 21, XO. 4, APR., 1919 



The duties of this position consisted of a biological study of the 

 insect fauna of the region with special reference to economic 

 forms and to mosquitoes in particular; research work in disease 

 transmission under the direction of Dr. S. T. Darling; supervision 

 of inspection of mosquito breeding conditions; investigation of 

 causes of malarial incidence and recommendation of control 

 measures as far as related to mosquito conditions. 



He entered the service of the Bureau of Entomology, August 

 1, 1911, and from then on was employed in the investigation 

 of the relations of insects to disease. The most notable portion 

 of his work was done from 1912 to 1914, in cooperation with the 

 Robert M. Thompson Pellagra Commission of the New York 

 Post-Graduate School of Tropical Medicine; he had charge of the 

 investigations at Spartansburg, South Carolina, on the possible 

 relation of insects to the transmission of pellagra. In this con- 

 nection he made studies in the West Indies of the occurrence of 

 pellagra and the buffalo gnats of the genus Simulium. 



After the conclusion of this work he was engaged in a malaria 

 mosquito survey of the District of Columbia. During this time 

 he lost his wife, whose death greatly affected him. 



On September 13, 1917, he entered the Sanitary Corps of the 

 Army as a first lieutenant and throughout his service was stationed 

 at Camp Shelby, Mississippi, where he had charge of all sanita- 

 tion related to insect control. After a year's service he was 

 promoted to a captaincy. 



Captain Jennings w r as an exceedingly painstaking investigator, 

 never committing himself to a positive statement unless ab- 

 solutely certain of his ground. 



He was uniformly courteous and considerate of the feelings of 

 other people. He was very much loved by his many friends. 

 Captain N. Riggins, one of his most intimate friends in the camp, 

 in a letter to Doctor Howard writes: "I can not tell you ade- 

 quately how deeply we all feel this loss. The captain was a fine 

 comrade and a staunch friend, and he had won in the camp the 

 esteem and respect of everyone with whom he had come in con- 

 tact, and this feeling always deepened upon further association. 



It seems to me that you should know that part of the last 



conversation with the Captain had to do with you and his old 

 associates at the Bureau. He was looking forward to getting 

 back to his real work, among the old scenes, old associates and 

 friends." 



Captain Jennings w r as a fellow of the American Association for 

 the Advancement of Science, an active member of the American 

 Association of Economic Entomologists, and of the Washington 

 Entomological Society. 



A list of his publications follow : 



