502 INDEX 



Yapp, 369 Zaitha, 171 



Yaws, 269 Zander, 440] 



Yellow fever, 252 Zeuzera pyrina, 419 



Yolk, *i29, *i3o Zittel, von, 433 



Yothers, 361, 377 Zones, life, *333 



Young, R. T., 461 Zoraptera, 12, 22 



Yuasa, 437 Zorotypus, 12, 22 



Yucca, pollination of, 222, *224 Zugmayer, 461 



