1917J CONTENTS. XIX 



Page. 

 Carrier, L., and Bort, Katherine S., The History of Kentucky Blue Grass and 



White Clover 529 



Chapin, R. M., and Schaffer, J. M., Extending the Usefulness of a Shaking 



Machine 413 



Childs, O. W., Proposed Motor-truck Loads for Highway Bridges 489 



Clark, W. M., and Lubs, H. A., Determination of Hydrogen-ion Concentration 



of Culture Media Ill 



Cole, F. R., A New Species of Exoprosopa 552 



Collins, G. N., and Kempton, J. H., A Field Auxanometer 226 



Collins, G. N., and Kempton, J. H., A Hybrid between Tripsacum and Euch- 



Ijena 27 



Collins, G. N., and Kempton, J. H., Patrogenesis in a Cross between Tripsacum 



and Euchlsena 28 



Cook, 0. F., Agriculture and Native Vegetation in Peru 27 



Cook, O. F., Eugenics and Agriculture 92 



Cook, O. F., Morphology and Evolution of Leaves 729 



Craighead, F. C, Determination of Abdominal and Thoracic Areas of Cerara- 



bycid Larvae as Based on a Study of the Muscles 258 



Crawford, J. C, Some American Hymenoptera 261 



Crawford, J. C., Some New American Hymenoptera 556 



Crawley, H., The Sexual Evolution of Sarcoct/stis mum 557 



Creswell, Mary E., Girls' and Boys' Club Work: A Manual for Rural Teachers. 294 



Creswell, Mary E., Home Demonstrations 195 



Creswell, Mary E. , The Home Demonstration Work 896 



Cron, A. B., Triple-seeded Spikelets in Sf)rghum 532 



Cushman, R. A. , The Native Food Plants of the Apple Red Bugs 356 



Dale, J. K., Preparation of Bromoacetylglucose and Certain Other Bromoacetyl 



Sugars 313 



Darrow, G. M., Southern Strawberries 241 



Davidson, W. M., Economic Syrphidse in California 56 



Doolittle, S. P., A New Infectious Mosiac Disease of Cucumber* 349 



Dorset, M. , Hog Cholera Investigations 675 



Dove, W. E., Some Notes Concerning Overwintering of the House Fly at Dallas, 



Tex 553 



DuBois, C, The Mountain Communities and the Forest Service 242 



Dyar, H. G., Mosquitoes at San Diego, Cal 552 



Dyar, H. G., New Aedes from the Mountains of California 552 



Dyar, H. G., and Knab, F., Eggs and Oviposition in Certain Species of Mansonia 552 



Eichhorn, A., Summary of Investigations on Immunization against Anthrax. . 675 



Eichhorn, A., and Gallagher, B., Spontaneous Amebic Dysentery in Monkeys. 576 



Eichhorn, A., and Potter, G. M., The Present Status of the Abortion Question. . 882 



Emery, W. 0., and Palkin, S., Researches on Organic Periodids, II 313 



Fink, D. E., Injmy to Peanuts by the Twelve-Spotted Cucumber Beetle 57 



Fox, H., Orthoptera and Orthopteran Habitats in the Vicinity of Lafayette, 



Ind 252 



Frothingham, E. H., Selling Woodlot Products on Michigan Fanns 45 



Gilbert, W. W., Cucumber Mosaic Disease 349 



Gile, P. L., Chlorosis of Pineapples Induced by Manganese and Carbonate of 



Lime 546 



Gile, P. L., and Carrero, J. 0., A Plan for Testing Efficiencies of Fertilizers 121 



Girault, A. A., A New Genus of Lelapine Chalcid Flies from the United States. . 260 

 Girault, A. A., A New Genus of Omphaline Eulaphid Chalcis Flies from Mary- 

 land 557 



