1920] CONTENTS. V 



Page. 



Book lice or psocids, Back 53 



Methods of controlling grasshoppers 53 



Changu or mole cricket {Scapteriscus didactylus) 53 



Neotoxoptera violw and its allies, Baker 54 



A contribution to the life history of the larch Chermes, Speyer 54 



Control of spot insects of the mango, Moznette 54 



Is it safe to fumigate while trees are in bloom? Wogluto 54 



The western wheiit-head army worm, Swenk 54 



Cutworms and army worms, Cook 55 



Cotton worm control. Hinds 55 



Notes on Elachista with descriptions of new species, Braun 55 



The Hessian fly and how to prevent losses from it, Walton 55 



Experimental infection in England of Anopheles, Bhicklock and Carter 55 



Observations on Anopheles plunibciis, Blackloek and Carter 55 



Warble flies (Hj/podenna lincatuiii and H. hovis), Hadwen .55 



Fruit flies from the Philippine Islands, Bezzi 56 



The construction of calcareous opercula by longicorn larvas, Beeson 57 



An insect very injurious to the coconut palm, Ci'espo 57 



Rhodnius hrcthesi n. sp., da Malta 57 



A Mexican species of Agrilus found in Arizona, Fisher and Nicolay 57 



Collecting some little known Buprestidse, Burke 57 



Report of entomologist, Hinds 57 



A modern bee farm and its economic management, Simmins 57 



Apiculture, Hommell 57 



Outapiaries and their management, Dadant 57 



Self-recording invention for obtaining weight of bees, Sanborn 58 



European foulbrood, White 58 



Noscma apis in hive bees, Rennie and Harvey 59 



Petiolate wasps of the family Eumenidfe found north of Mexico, Isely 60 



Viereck's family Labenidre with new species of Apechoneura, Cushman 60 



Parthenogenesis in the pear-slug sawfly [CoUroa cerasi Linn.] Ewing 60 



Studies on Rocky Mountain spotted fever, Wolbach 60 



FOODS HUMAN NUTRITION. 



The nation's food, Pearl 60 



The modern science of food values, Armsby 62 



Further studies of qualitatively insufficient foods, Auer 62 



Resistance of red blood corpuscles under nitrogen deficiency, Acel 63 



Brains and spinal cord of slaughtered animals as food, Weitzel 63 



The composition of vegetables and their waste products, von Schleinitz 63 



Antiberiberi vitamin content of sun-dried vegetables. Shorten and Roy 63 



The use of apples and pears in bread making, Mohorcic 64 



The use of horse-chestiuits as a fiour substitute, Prausnitz 64 



On the digestibility of cocoa butter, Gardner and Fox 64 



The utilization of yeast by the animal organism, Voltz 64 



Sanitai'y food regulations, Tognoli 65 



The utilization of hydrolyzed casein, Miiller and Murschhauser 65 



Nitrogen partition in the urine of the races in Singapore, Campbell 65 



War edema in Turkish prisoners of war, Enright 66 



Nutrition laboratory, Benedict 66 



ANIMAL PRODUCTION. 



Posthumous works of Charles Otis Whitman, edited by Riddle and Carr__ 66 



On the possibility of intranuclear transfer in homozygotes, Lotsy 67 



Problems of animal breeding, Watson 67 



Effect of feeding pars tul>eralis and pars anterior proprior, Marinus 67 



The feeding and improvement of live stock, de Campos Penteado 68 



Sudan grass silage, Dowell and Friedemann 68 



Feeding sunflowers, Arnett, Joseph and Tretsven 68 



Commercial feeding stuffs, July 1 to September 30, 1919, Proulx et al 69 



Commercial feeding stuffs and registrations for 1919, Cathcart 69 



Karakule sheep and Pei'sian lamb fur production, O'Brien 69 



The need for improved methods in handling sheepskins, Mathews 70 



Preliminary report on comparison of feeds for fattening liogs, Thompson. 70 



