IV 



TABLE OF CONTENTS. 



PART SECOND— SYSTEMATIC DISTRIBUTION OF 

 THE ORTALID^]. 



PAGE 



FIRST DIVISION: ORTALID^l HAVING THE FIRST LONGI- 



i-UUlliALl VJ2iIl> .DIUQIJj 



PAGE 



Udlflrl ..... 



OM 



First Section : PYRGOTINA . 



33 



Third Section : CEPHALINA . 



48 



Second Section: PLATYSTO- 





Fourth Section : ORTALINA . 



52 



MINA .... 



36 



Fifth Section : PTEROCAL- 









LINA 



58 



SECOND DIVISION: ORTALIDiE HAVING THE FIRST LON- 

 GITUDINAL VEIN BARE 



First Section : ULIDINA 



63 



64 | Second Section: RICHARDINA 66 



PART THIRD— THE NORTH AMERICAN 

 ORTALID.E. 



FIRST DIVISION: ORTALIDJE HAVING THE FIRST LONGI- 

 TUDINAL VEIN BRISTLY OR HAIRY 



First Section : PYRGOTINA . 72 



Gen. I. Pyrgota Wied. . 72 



1. millepunctata Lw. 9 . 73 



2. undata Wied. %.$ . 77 



3. vespertilio Gerst. £ . 79 



4. pterophorina Gerst. $ . 81 



Second Section: PLATYSTO- 



MINA .... 83 



Gen. I. Amphicnephes nov. 



gen 83 



1. pertusus nov. sp. % . 9 84 



Gen. II. Himeroessa n. g. . 85 



1. pretiosa n. sp. % . 85 



Gen. III. Rivellia R. Desv. 87 



1. conjuncta n. sp. 9 • 88 



2. viridulans R. Desv. %.$ 88 



3. quadrifasciata Macq. % 90 



4. variabilis n. sp. % 



5. flavimana n. sp. % . 9 



6. micans n. sp. 9 • 



7. pallida n. sp. % . 9 



Gen. V. Mischogaster J/ocg. 



72 



91 

 92 

 94 

 95 



Gen. IV. Stenopterina Macq. 96 

 1. caerulescens n. sp. £ . 97 



98 



Gen. VI. Myrmecomyia 72. 



Desv 99 



1. myrmecoides Lw. % . 9 100 



Third Section : CEPHALINA 



. 102 



Gen. I. Tritoxa n. g. . 



102 



1. flexa Wied. % . 9 



102 



2. incurva n. sp. % . 9 



104 



3. cuneata n. sp. % . 9 



107 



Gen. II. Camptoneura Macq 



108 



1. picta Macq. % . 9 



109 





