TABLE OF CONTENTS. 



THE FAMILY ORTALID^E. 

 PART FIRST.— INTRODUCTION. 



PAGE 



The European Ortalid^e ........ 2 



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



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



common ......... 2 



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



The other European Ortalidse ....... 4 



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



2. Forms resembling Ortalis syngenesim .... 6 



3. Forms resembling Ortalis pallidum .... 7 



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



Aciphorea not belonging to the Ortalidse ..... 8 

 Summary of the European Ortalidae . . . . .10 



The Ortalid-e other than European . . . . . .11 



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



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



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



d. In Walker 2(3 



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



Natural characters of the family Ortalilve .... 28 



Relationship of the Ortalilve ....... 30 



Diagnostic or artificial definition of the Oktalid/e ... 31 



(iii) 



