1919] CONTENTS. XXIII 



Page. 

 Nelson, J. A., The Segmentation of the Abdomen of the Honeybee Ll/W.s 



mellifica) 170 



Nelson, J. A., An Eyeless Drone Honeybee 7.~>fj 



Nelson, E. W., Wild Animals of North America 646 



Nelson, E. W., Wild Life in Our National Parka 646 



Nougaret, R. L., The Grape Mealy Bug (Pseudocooous bakeri) 650 



Oberholser, H. 0., Swan Lake, Nicollet County, Minn., as a Breeding 



Ground for Waterfowl 55 



Oberholser, H. C, Aristonetta, a Good Genua |t;i 



Oberholser, H. C, Hierofakso rusticoltu candica/ns In North Dakota 161 



Oberholser, H. C, Olor colunibimius on the Potomac River 161 



Oberholser, H. C, Bpizella montteofa, the Correct Name for the North 



American Tree Sparrow 161 



Oberholser, H. C, Squateroia cyno&wra near Washington, D. C 161 



Oberholser, H. C, The Criterion of Subspecific Intergradation in Verte- 

 brate Zoology 254 



Oberholser, H. C, The Migration of North American Birds, IV-VI 254 



Oberholser, H. C, Diagnosis of a New Genus of Anatidre from South 



America 254 



Oberholser, H. C, The Subspecies of Larus hyperboreus 254 



Oberholser, EL C, Mutanda Ornithologica, IV 350 



Oberholser, U, C, Notes on North American Birds, IV-VII 254 



Oberholser, H. C, A Synopsis of the Iiaces of Bombycilla rjurrula 351 



Oberholser, H. C, Description of a New Iole from the Anamba Islands 351 



Oberholser, H. C, The Migration of North American Birds, VII 646 



Oberholser, H. C, A Second Bird Survey at Washington, D. C 646 



Oberholser, H. C, The Status of the Genus Orchilus Cabauis 646 



Oberholser, H. C, Mutanda Ornithologica, V 646 



Obst, M. M., A Bacterologic Study of Sardines 555 



Ousley, C, Farming Plans for 1919 7S9 



Palmer, T. S., Costa's Hummingbird. — Its Type Locality, Early History 



and Name 646 



Pemberton, C. E., and H. F. Willard, Work and Parasitism of the Med- 

 iterranean Fruit-fly in Hawaii during 1917 62 



Pemberton, C. E., and H. F. Willard, A Contribution to the Biology of 



Fruit-tly Parasites in Hawaii 459 



Peters, J. G., A Program of Forest Conservation for the South 841 



Pierce, R. G., Notes on Peridermiums from Ohio 6-15 



Pierce, It. G., Additional List of State and National Quarantines Against 



the White Pine Blister Rust S".2 



Pierce, W. D., Notes on Insects of the Order Strepsiptera, with Descrip- 

 tions of New Species 266 



Pierce, W. D., The Comparative Morphology of the Order Strepsiptera, 



together with Records and Descriptions of Insects 266 



Pierce, W. D., Medical Entomology a Vital Factor in the Prosecution of 



the War 7S i 



Pierce, W. D., The Case of the Genera Rhina and Magdalis 759 



Pierce, W. D., R. H. Hutchinson, and A. Moscowitz, Government Report 

 on Laundry Machinery. — Its Adaptability to Various Requirements 



and Disinfection and Disinsection : 551 



Piper, C. V., The Most Pressing Agricultural Development Problem in the 



United States 91 



