502 INDEX 



Yapp, 369 Zaitha, 171 



Yaws, 269 Zander, 440 



Yellow fever, 252 Zeuzera pyrina, 419 



Yolk, "129, *i 3 o Zittel, von, 433 \ 



Yothers, 361, 377 Zones, life, *3 33 



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



Yuasa, 437 Zorotypus, 12, 22 



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



