132 
The Ohio Naturalist. 
[Vol. XIII, No. 6 , 
MEETING OF THE BIOLOGICAL CLUB. 
Orton Hall, December 2, 1912. 
The meeting was called to order by the President, W. G. Stover. 
The presentation of papers followed the reading and approval 
of the minutes. 
Mr. C. K. Brain gave the first paper on the “Internal Anat¬ 
omy of Stomoxys calcitrans.” This blood-sucking fly had been 
suggested as the agent in transmitting blood diseases in India and 
other tropical countries, some time back. In October of the 
present year, Rosenauer declared it to be the host of a part of the 
life cycle of the organism causing infantile paralysis, and transmits 
that disease. Anderson and Frost’s work on monkeys in 
November, confirmed the idea. 
Experiments by the Ohio State Board of Health point to a 
mechanical transmission by Stomoxys. 
The digestive systems of Stomoxys and Anopheles, the malaria 
mosquito, were compared in detail and figured. The conditions in 
Stomoxys appear to be on the whole more complicated and elab¬ 
orate than in the mosquito, though there is some reduction in 
number of mouth parts and no distinction between sexes can be 
made on the basis of mottth parts. 
The abdominal sucking stomach and the abdominal position 
of the salivary glands are noticeable features in Stomoxys. 
Prof. Landacre talked on the “Production of Germinal Varia¬ 
tions.” He spoke particularly of the work of Dr. Tower who has 
produced variations in the color patterns and antennae of beetles 
by altering conditions of temperature and moisture. This work 
seems to give the best of the argument to the transmissionists. 
Mr. W. G. Stover exhibited some specimens of Oklahoma 
fungi, calling attention especially to the wood forms, the grass 
forms, and the stink-homs. A number of these Oklahoma fungi 
are also found in Ohio. 
The following persons were elected to membership in the Club: 
Walter R. Wheelock, Lillian E. Humphrey, Ralph R. Jeffries, 
Po Chen, Mary Storer. 
The meeting was then adjourned. 
Marie F. McLellan, Secretary. 
Date of Publication, April 28, 1913. 
