INDEX. 



Bulletin 



No. Page. 



Ainslie, C. N., bulletin on "The western grass-stem sawfly " 841 1-27 



Alabama — 



f 6-10, 13, 



| 1 o "1 Q OO 



lumber production, 1918, by mills and by woods 845< 2g' 39' 32' 



Uo' 42-47 



mosaic disease of sugar cane 829 6 



pine lands, cattle growing for beef, conditions 827 6-13, 31 



Alfalfa hay, comparison with other legume hay 827 35 



f 4-13, 20- 



Ammonia nitrogen, per cent in frozen egg products, determination. 846< 54, 72-75, 



{ 79-80 



Anoecina, genera, description and key 826 13-14 



Aphididae — 



genera not placed 826 88-89 



generic classification, bulletin by A. C. Baker 826 1-109 



phylogeny of 826 3-10 



Aphidina, genera, description and key 826 7, 40-53 



Aphidinae, tribes and genera, classification, description, and keys. 826 4, 10-61 



Aphidini, subtribes and genera, description and keys 826 8, 39-61 



Aphidoidea, superfamily, key and families 826 2 



Aphids — 



' ' 81-86 



honeydew secretion, notes 826 77-79 



tribe and genera, classification 826 2-109 



Aphis — 



classification and relationships, studies 826 7-8 



spp. key and descriptions 826 41, 43-44 



Apple trees — 

 injury — 



by borers 847 5-6, 11-12 



by washes for control of borers 847 33, 34, 37 



protection from borers, directions 847 30-39 



roundheaded borer, life history and control, bulletin by Fred E. 



Brooks 847 1-42 



worming for borers, directions and value 847 31-32, 41 



Apples, varieties attacked by roundheaded borer 847 19 



Apple-tree borer, roundheaded, life history and control, bulletin 



by Fred E. Brooks 847 1-42 



Arizona — 



f 6-10, 14, 



lumber production, 1918, by mills and by woods 845< 16, 23, 42- 



l 47 



occurrence of bean ladybird 843 12, 13 



Yuma Reclamation Project, siphon spillways 831 28-31 



Arkansas — 



f 6-10, 13, 



lumber production, 1918, by mills and by woods 845< 05I97 ' 32- 



{ 40,42-47 



pine lands, cattle growing for beef, conditions 827 6-13, 31 



Arlington Experiment Farm, sweet-clover seed, studies 844 2-25 



86325 22 2 1 



