TABLE OF CONTENTS. 



THE FAMILY ORTALID.E. 

 PART FIRST. INTRODUCTION. 



PAGE 



THE EUROPEAN ORTALID.S . . . . . . . . 2 



Meigen's genus Ortalis ........ 2 



1. Characters which Meigen's species of Ortalis have in 



common ......... 2 



2. Species erroneously placed in the genus Ortalis . . 3 



The other European Ortalidae ....... 4 



1. Forms resembling Ortalis lamed ..... 5 



2. Forms resembling Ortalis syngcnesice .... 6 



3. Forms resembling Ortalis paludum .... 7 



4. Forms not resembling any of Meigen's species . . 8 



Aciphorea not belonging to the Ortalidae ..... 8 

 Summary of the European Ortalidae . . . . .10 



THE ORTALID.& OTHER THAN EUROPEAN . . . . . .11 



a. In Wiedemann . . . . . . . . .11 



b. In Rob. Desvoidy ......... 15 



c. In Macquart . . . . . . . .19 



d. In Walker 2G 



e. In Bigot, Gerstsecker, Doleschall, and Saunders ... 27 



NATURAL CHARACTERS OF THE FAMILY ORTALIDJE .... 28 



RELATIONSHIP OF THE ORTALIDJE ... . . . .30 



DIAGNOSTIC OR ARTIFICIAL DEFINITION OF THE ORTALID^E ... 31 



"(in) 



