LIST OF ILLUSTRATIONS 



PLATES 



American wasps of the genxts Sceliphron Klug 



By Ben net A. Porter 



Facing page 



1-4. Details of Sceliphron wasps 22 



Descriptions op larvae and pupae of two-winged flies be- 

 longing TO THE family LePTIDAE 



By Charles T. Greene 



1. Larvae and pupae of the family Leptidae 20 



2-3. Pupae of the family Leptidae 20 



A fossil palm fruit from the Middle Eocene of North- 

 western Peru 



By Edward W. Berry 



1. Astrocaryum olssoni Berry 4 



New Ukocoptid land shells from Mexico 



By Paul Bartsch 



1. New Urocoptid land shells from Mexico 14 



Notes on cestode parasites of birds 

 By Edwin Linton 



1. Cestodes of grebe, gull, and tern ^ 74 



2. Cestodes of shearwaters and night heron 74 



3. Cestodes of shearwater, grebe, and loon 74 



4. Cestodes of frigate-bird, gull, and green heron 74 



5. Cestodes of green heron, English sparrow, gulls, and loon 74 



6. Cestodes of loon, gulls, and merganser 74 



7. Cestodes of green heron, scoter, and whistler duck 74 



8. Cestodes of whistler duck, gulls, and merganser 74 



9. Cestodes of merganser and American pochard 74 



10. Cestodes of American pochard, grebes, loon, scaup duck, coot, and 

 scoter 74 



11. Cestodes of scoter, gull, coot, yellow-billed cuckoo, and American 



pochard 74 



12. Cestodes of American pochard, night heron, and loon 74 



13. Cestodes of sanderling, sheldrake, scoter, and old squaw 74 



14. Cestodes of old squaw and scoter 74 



15. Cestodes of American pochard 74 



