INDEX. 157 



Nightshade, common. (See Solarium nigrum.) 



Ononis, food plants of Phytonomus nigrirostris 1 



spinosa, food plant of Phytonomus nigrirostris 1 



Oporornis tolmei, enemy of Tipulidae 130 



Oriole, Baltimore. (See Icterus galbula.) 

 Bullock. (See Icterus bullocki.) 



Oxalis stricta, food plant of Aphis maidi-radicis 102 



Oxyechus vociferus, enemy of Sitones hispidulus. 37 



Tipulidae ' 129 



Pachyrhina ferruginea, Empusa sp. an enemy 130 



flying in March and April 120 



second brood flying in August and September. 120 



macrocera, flying in March and April 120 



most species flying in June 120 



semiaquatic in early stages 120 



sodalis, flying in August and September 120 



Passerculus sandwichensis, enemy of Tipulidae 129 



Passerella iliaca, enemy of Tipulidae 130 



Passerina nivalis, enemy of Tipulidae • 129 



Pasturing against ' ' meadow maggots " 130, 131 



in its effects on Hemileuca oliviae 93-94 



Peas, food plants of Sitones puncticollis and S. lineatus 29 



"Pea weevils." (See Sitones puncticollis and S. lineatus.) 



Penthestes atricapillus, enemy of Tipulidae 130 



carolinensis, enemy of Tipulidae 130 



gambeli, enemy of Tipulidae 130 



Pepper grass. (See Lepidium apetalum.) 



water. (See Polygonum hydro piperoides .) 



Petrochelidon lunifrons, enemy of Tipulidae 130 



Pewee, western wood. (See Myiochanes richardsoni.) 

 wood. (See Myiochanes virens.) 



Pheidole dentata comutata, attendant on Aphis maidi-radicis 102 



sp. , attendant on Aphis middletoni 116 



vinelandica, attendant on Aphis maidi-radicis 102, 105 



middletoni 116 



Phillips, W. J., paper, "The Slender Seed-corn Ground-beetle (Clivina im- 



pressifrons Lee.) " 13-28 



Philohela minor, enemy of Tipulidae 129 



Phoebe. (See Sayornis phcebe.) 



black. (See Sayornis nigricans.) 

 Say . (See Sayornis say us . ) 



Phytonomus nigrirostris 1-12 



adult, description 11 



bibliography 12 



description 11 



dispersion, trend, and methods 4-5 



egg, description 11 



food plants 12 



history in America 2-4 



investigations in the District of Columbia and vicinity. 5-10 



larva, full-grown, description '. 11 



young, description 11 



natural enemies 11-12 



pupa, description 11 



seasonal history 10 



