23 
Wilhelminaia Preston Moll. 74 
Williamsonia Davis Ins. 460 
Wilsonema Cobb Verm. 39 
Xamerpillus Sicard Ins. 269 
Xantepyris Kiefler Ins. 320 
Xanthexochus Morley Ins. 293 
Xanthocampoplex Morley Ins. 293 
Xanthocnemis Tillyard Ins. 460 
Xanthonachis Ins. 429 
Xanthosoraocles Brethes Ins. 310 
Xanthosomoides Girault Ins. 310 
Xenacalles Broun Ins. 249 
Xenalluaudia Raflray Ins. 212 
Xenanteon Kiefler Ins. 320 
Xenetomorpha Poppius Ins. 439 
Xenicomorpha Spaeth Ins. 266 
Xenobythites Raddifle Pisces 41 
Xenomymar Crawford Ins. 311 
Xenopelte Cameron Ins. 311 
Xonorias Fisher Ecliin. 42 
Xoimrocharax Regan Pisces 29 
Xostocis Lea Ins. 249 
Xestoleptura Casey Ins. 260 
Xestotermopsis von Rosen Ins. 455 
Xestotrachelus Bruner Ins. 468 
Xiphinema Cobb Verm. 39 
Xipliiopsylla Jordan & Rothschild Ins. 
430 
Xiphocrema Ford Ins. 286 
Xiphophasma Rehn Ins. 462 
Xyleborinus Reitter Ins. 250 
Xyleborips Reitter Ins. 250 
Xyleborites Wickham Ins. 250 
Xyloclytus Reitter Ins. 260 
Xylophylla Hampson Ins. 363 
Xylosandrus Reitter Ins. 251 
Yalavis Shufddt Aves 127 
Yngveella Poppius Ins. 439 
Zacalochlora Crawford Ins. 311 
Zacladus Reitter Ins. 249 
Zadiolcogaster Viereck Ins. 297 
Zaglyptomorpha Viereck Ins. 293 
Zagrainmosomoides Girault Ins. 311 
Zamastrus Viereck Ins. 293 
Zanda Mathews Aves 108 
Zanobatus Garman Pisces 26 
Zaparaphylax Viereck Ins. 293 
Zaplothooornia Schmiedeknecht Ins. 293 
Zarapita Mathews Avos 102 
Zolinkiella Harring Verm. 42 
Zetha Shdford Ins. 461 
Zeugmatolepas Withers Crust. 48 
Zeugonota Spaeth Ins. 267 
Zewa McCulloch Crust. 28 
Zomeutis Meyrick Ins. 390 
Zorotypus Silvestri Ins. 469 
Zunasia Jordan & Metz Pisces 28 
Zygiobia Kiefler Ins. 401 
Zygogaster Eigenmann Pisces 29 
