14 
Unaspis MacGillivray Ins. 251 
Undotheca Stechow Coelen. 9 
Ungulaspis MacGillivray Ins. 251 
Unitaxonus MacGillivray Ins. ICO 
Urothyreus Horvath Ins. 240 
Vaghia Oudemans Arachn. 19 
Varicaspis MacGillivray Ins. 251 
Vasconaster Lambert Echin. 15 
Velinda Andrewes Ins. 108 
Ventripila Roeiver Araclin. 18 
Versiculaspis MacGillivray Ins. 251 
Vesposus Jordan Pisces 19 
Villeneuvia Townsend Ins. 237 
Vingselina Sjdstedt Ins. 269 
Walcherenia Man Vermes 21 
Walcottina Cobbold Bracli. 6 
Walterella Dyar Ins. 194 
Wasmannotherium Bernhauer Ins. 112 
Wexfordia Harmer Moll. 34 
Wimania Stensid Pisces 23 
Wirenia Odhner Moll. 29 
Xanioptera Enderlein Ins. 245 
Xanthodora Cobb Vermes 18 
Xanthosirex Semenov - Tian - Shanshy 
Ins. 166 
Xenetopsis Poppius Ins. 243 
Xennella Cobb Vermes 18 
Xenochironomus Kieffer Ins. 217 
Xenolaimus Cobb Vermes 18 
Xenomyia Malloch Ins. 237 
Xenonema Cobb Vermes 18 
Xenosia Malloch Ins. 237 
Xenostira Borchmann Ins. 132 
Xenotachina Malloch Ins. 237 
Xenotanytarsus Kieffer Ins. 217 
Xenothoracochaeta Malloch Ins. 237 
Xenotipula Alexander Ins. 226 
Xenydrium Bergroth Ins. 241 
Xestias Jordan Pisces 21 
Xiengia Distant Ins. 240 
Ximena Cobb Vermes 18 
Xipholimnobia Alexander Ins. 226 
Xiphydriola Semenov - Thian - Shansky 
Ins. 166 
Xoanon Semenov - Thian - Shansky 
Ins. 166 
Xyala Cobb Vermes 18 
Xypechtia Sjdstedt Ins. 269 
Yazawaia Marumo Ins. 186 
Ypsilocarpa Arnbdck - Christie - Linde 
Prochord. 3 
Ypsilon Cobb Vermes 18 
Yramea Reuss Ins. 172 
Yrrhapta Sjdstedt Ins. 269 
Zabrala Sjdstedt Ins. 269 
Zachrestinus Enderlein Ins. 159 
Zalonema Cobb Vermes 18 
Zanema Cobb Vermes 18 
Zanysson Rohwer Ins. 153 
Zasenoelia Rohwer Ins. 166 
Zastenomorpha Viereck Ins. 160 
Zelandopsyche Tillyard Ins. 208 
Zelandobius Tillyard Ins. 257 
Zeletocoris Poppius Ins. 243 
Zelotes Jordan Pisces 18 
Zemiagrammus Jordan Pisces 22 
Zenobiella Gude Woodward Moll. 43 
Zerafia Strand Ins. 186 
Zetoborella Hebard Ins. 262 
Zittelina Rollier Brack. 7 
Zygethomeris Chamberlin Arachn. 29 
Zygonemella Cobb Vermes 18 
Zyxommoides Martin Ins. 260 
Zyzzygus Stechow Coelen. 9 
