CONTENTS. 



Vll 



Bulletin 157. The Marguerite fly {Phytomijza chnjsanthemi Kowarz), 21 



Introduction, 21 



History and distribution, 22 



Food plants, 24 



Name, 25 



Injuries, 26 



Importance, 27 



Life history and habits, 28 



Adult, 28 



Habits, 28 



Mating, 29 



Feeding, 31 



Oviposition, 33 



Egg, 37 



Larva, 38 



Pupa, 42 



Length of life cycle, 45 



Number of generations, 45 



Hibernation, 45 



Control, 46 



Conclusions, 48 



Natural enemies, ^ . . . .49 



Summary, 50 



Bibliography, 52 



ExjDlanation of plates, 52 



Bulletin 158. The composition, digestibility and feeding value of 

 Molassine meal, cottonseed meal and hulls, cocoa shells, 

 grain screenings, flax shives, Mellen's Food refuse, and 



postum cereal residue (CXX Feed), 53 



Molassine meal, 53 



Composition of Molassine meal, 53 



Digestibihty of Molassine meal, 54 



Feeding experiment with dairy cows, 55-60 



Molassine meal for horses, 60 



General statement concerning molasses as a foodstuff, . . 60 



How to feed plain molasses, 61 



Cottonseed meal and cottonseed hulls, 61 



Composition of four grades of cottonseed meal used in di- 

 gestion experiments, 62 



Digestion coefficients with sheep, 63 



Cottonseed feed meal, 63 



Conclusions, 65 



Cocoa shells, 65 



Chemical composition, ■ . 65 



Digestion coefficients with sheep, 66 



