INDEX. 151 



Page. 



Contarinia sorghicola 39-58 



adult, description 45^7 



"cocooned larva, " description 48-49 



copulation 49 



descriptions 45-49 



distribution 42 



egg, description 47 



location 51-52 



emergence 49 



generations, number 52 



habits 49-52 



hibernation 54-55 



history in America 40-42 



host plants 44^45 



investigations in Louisiana and Texas during 1908 and 1909 . 42^4 



larva, description 47-48 



larvae, location 52 



length of life of adult 53 



life cycle 52-54 



history 49-52 



natural enemies 55-57 



oviposition 50-51 



pupa, description 48 



location 52 



rearing methods 43-44 



relation of Johnson grass to its control. 55 



remedial measures : 58 



seasonal activity 53-54 



Corn, cultivation and rotation against corn root-aphis 106-107 



food plant of Aphis maidi-radicis s 97, 101, 104, 108 



fertilization against corn root-aphis 106 



late planting against slender seed-corn ground-beetle 27 



root-aphis. (See Aphis maidi-radicis.) 



seed, food of Clivina impressifrons 13, 18-28 



treatment to repel corn root-aphis 107-108 



slender seed-corn ground-beetle 24-26 



short rotation against corn root-aphis 106 



Corvus brachyrhynchos, important enemy of Tipulidse 129 



Cosmos bipinnatus, food plant of Aphis middletoni 113, 115 



Cotton, cultivation and rotation against corn root-aphis 108-109 



food plant of Aphis maidi-radicis 97, 108-109 



Chalcodermus seneus 135-136, 137-138 



prevention of injury by cowpea curculio 146 



Cowpea curculio. (See Chalcodermus seneus.) 



food plant of Aphis maidi-radicis 102 



Chalcodermus seneus 135. 137 



storing pods to destroy cowpea curculio 146 



Crane-fly, smoky. (See Tipula infuscata.) 



Cremastogaster lineolata, attendant on Aphis maidi-radicis 115 



middletoni 115 



vars. opaca and clara, attendant on Aphis middletoni 115 



