LIST OF ILLUSTRATIONS 



PLATES 



New fossil pbably fresh-water mussels from deposits on the Upper 



Amazon of Peru 



By William B. Marshall 



Facing page 



1. New fresh-water mussels from Peru 8 



Two NEW nematode worms from rodents 

 By Emmett W. Price 



1. Syphacia thompsoni, new species 6 



2. Heligmostrongylus hassalli, new species 6 



Fossil footprints from the Fort Union (Paleocene) of 



Montana 



By Charles W. Gilmore 



1. Type slab of Ammobatrachiis montanensis 4 



2-3. Part of type slab of Ammobatrachus montanensis 4 



Notes on some Oriental Sapromyzid flies (Diptera), with 

 particular reference to the Philippine species 



By J. R. Malloch 



1. Details of Celyphinae and Sapromyzinae 89 



2. Details of Sapromyzinae 90 



3. Details of Homoneura 91 



4r-5. Hypopygia of species of Homoneura 92, 93 



6. Hypopygia and apical genital segments of species of Homoneura 94 



MONIEZIA, A GENUS OF CESTODE WORMS, AND THE PROPOSED RE- 

 DUCTION OF ITS SPECIES TO THREE 



By E. Leonard Taylor 



1-2. Variations in Moniezia expansa 10 



3. Variations in Moniezia expansa and M. planissima 10 



4. Variations in Moniezia expansa 10 



5. Variations in Moniezia expansa and M. planissima 10 



Tropical American Diptera or two-winged flies of the family 

 dolichopodidae from central and south america 



By M. C. Van Duzee 

 1-2. Details of the flies of the family Dolichopodidae 64 



IX 



