CONTENTS. 



Page. 

 Part I.— Classification. 



Synoptic table of tribes x v 



Microdonini xvi 



Chilosini xvi 



Melanostoraiiii xix 



Syrphini xx 



Pelecocerini xxi 



Spheginini xxi 



Bracbyopini xxii 



Volncelliui xxii 



Sericomyini xxiii 



Eristalini xxiii 



Xylotini xxiv 



Milesini xx v 



Cerini xxvi 



Family characters xxvi 



Table for the determination of ge- 

 nera xxvii 



Part II. — Descriptions. 



Microdon •! 



Chrysotoxura 13 



Paragus 17 



Nausigaster 21 



Pipiza '-^i 



Psilota 30 



Lepromyia 31 



Chrysogaster 31 



Chilosia 38 



Melanostoma 46 



Pyrophipna 54 



Platycbirus 56 



Leucozona 61 



Catabomba 62 



Eupeodes 64 



Syrphus 66 



Didea 89 



Xantbogramma 91 



Allograpta 96 



Mesograpta 98 



Sphserophoria 104 



Pelecocera 110 



Neoascia Ill 



Spbegina 113 



Baccba 116 



Chalcomyia 126 



Myiolepta 



Rhingia 



Eugeniamyia ... 



Brachyopa 



Volucella 



Copestyluni 



Sericomyia 



Arctopbila 



Eristalis 



Doliosyrpbus .. . 



Pteroptila 



Helophilns 



Pterallastes 



Teucbocnemis .. 



Mallota 



Triodouta 



Tropidia 



Criorbina 



Cyuorbina 



Somula 



Crioprora 



Pocota 



Bracbypalpns .. 



Xylota 



Syritta 



Cbrysocblamys 



Merapioidus 



Spilomyia 



Temnostoma . . 



Milesia 



Spbecomyia . . . 

 Ceria 



Part III.— Conclusion 



Habits of tbe Syrpbidie 



LarviB 



Structural characters 



Secondary sexual characters 

 Geographical distributiou. .. 



Geological distribution 



Chronological list of genera. 



Definition of terms 



Appendix 



Explanation of plates 



Index 



Plates I to XII 



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 129 

 130 

 131 

 134 

 151 

 153 

 157 

 1.58 

 178 

 179 

 183 

 198 

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 201 

 205 

 206 

 209 

 212 

 216 

 217 

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 239 

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269 

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275 



278 

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 291 

 304 

 327 

 305 



