288 
Philijjpine Journal of Science 
Molauin Creek, a rapid mountain stream, dividing the campus 
of the College of Agriculture, lies northwest by north of the 
point where the first swarms of Anopheline mosquitoes were 
seen. It is not more than 150 meters away, and is separated 
by a moderately thick grove containing many bamboos. The 
strong breeze mentioned is the daily tail end of the southeast 
monsoon of this time of the year in this locality; these facts 
might be adduced to show that neither the intervening woods 
nor the strong breezes would keep the mosquitoes from invading 
the college buildings as well as the houses higher up the hill, 
all of which lie to the windward of their breeding places. 
Malaria is most prevalent in this locality during the dry 
season; the creek furnishes an ideal breeding place for My- 
zomyia febrifera Banks during the entire dry period, and 
the range of activities of this pernicious little mosquito would, 
if it have the same powers of flight as M. rossii, appear to be 
limited only by two factors, gamete carriers and the number 
of individuals exposed. 
