132 
PACIFIC SCIENCE, Vol. Ill, April, 1949 
5. Attempts to transmit the pigeon Haemo- 
proteus to three species of doves and to a 
young chicken, either by means of the fly 
vector or by inoculation of macerated flies, 
proved negative. 
6. Ookinetes and oocysts failed to develop in 
Culex quinquefasciatus Say, Aedes albopictus 
(Skuse), and Olfersia aenescens Thomson 
when these species were allowed to feed on 
infected pigeons. O. aenescens did not feed 
readily on pigeons. Smears of the stomach 
contents of engorged female mosquitoes of 
both species showed mainly halter forms in 
red cells and some rounded macrogameto- 
cytes. Some extracellular microgametocytes 
were also noted but definite evidence of ex- 
flagellation was not found. 
Acknowledgments : Thanks are due the fol- 
lowing persons for their aid in these experi- 
ments: Paul Breese, Director of the Honolulu 
Zoo, for generously allowing complete freedom 
in observations and examinations of pigeons 
and other birds; Jane Y. C. Yuen for her aid in 
taking blood smears and for laboratory help; 
Dr. D. D. Bonnet, Territorial Board of Health, 
for supplies of larval and pupal Culex quinque- 
fasciatus; Dr. Frank Richardson, Assistant Pro- 
fessor of Zoology, University of Hawaii, for 
help in collecting hippoboscid flies from ocean 
birds; and Dr. J. Bequaert, Harvard Museum 
of Comparative Zoology, for identifying the 
Olfersia aenescens. Appreciation is also due the 
University of Hawaii Agricultural Experiment 
Station for the use of certain of its facilities. 
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