Index to Genera and Higher Groups. 



137 



Xenidae, 42 

 Xenopsylla, 73 

 Xiphydriidse, 20 

 Xyelidae, 19 

 Xyleborus, 40 

 Xylesthia, 58 

 Xylina, 54 

 Xylocopidse, 30 

 Xylophagidae, 64 

 Xyloryctidse, 58 

 Xylota, 66 



Yponomeutida?, 5&, 58 

 Ypsolophus, 56 



Zaitha, 77 

 Zarsea, 20 

 Zeuzera,50 

 Zodion, 66 

 Zoraptera, 17 

 Zorotypidse, 17 

 Zygsenidse, 53 

 Zygentoma, 81 

 Zygoptera, 43 



