INDEX. 151 



Contarinia sorghicola 39-58 



adult, description 45^47 



"cocooned larva," description 48—40 



copulation 49 



descriptions 45—40 



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—44 



larva, description 47-48 



larvae, location 52 



length of life of adult 53 



life cycle 



history - 49-52 



natural enemies 55-57 



oviposition 



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 97, 101, 10 4, 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 ] 3, 18-28 



treatment to repel corn root-aphis 107-10S 



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 A ph is m iddleton i 113, 115 



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



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



Chalcodermus seneus L35-136, L37 L38 



prevention of injury by cowpea curculio 146 



Cowpea curculio. (See Chalcodermus aeneus.) 



food plant of Aphis maidi-radicis 102 



Chalcodermus seneus L35, L37 



storing pods to destroy cowpea curculio 1 Ki 



Crane-fly, smoky. (See Ti pitta infuscata.) 



Cremastogaster lineolata, attendant on Aphis maidi-radicis l l."S 



middlctoni 115 



vars. opacaand clara, attendant on Aphis middletoni. ... 115 



