IITDEX. 83 
Plutella amoracea — Continued. - Page. 
habits 72-73 
insecticide experiments 76 
life history 73 
occurrence in Colorado 71-72 
rearing records 73-75 
Plutella maculipennis — 
control by nicotine sulphate and whale-oil soap 10 
damaging cabbage in Hawaii 33 
on horse-radish 71 
Polistes hebrseus — 
enemy of Pontia rapas 7 
probable enemy of Hymenia fascialis 7 
Pontia protodice on horse-radish 71 
Pontia rapse — 
control by nicotine sulphate and whale-oil soap 10 
damaging cabbage in Hawaii 33 
on horse-radish 71 
prey of Polistes hebrseus 7 
Porizon macer. (See Temelucha [Porizon] macer.) 
Porosagrotis catenula, race of P. vetusta, distribution 51 
Porosagrotis satiens, race of P. vetusta, distribution 50 
Porosagrotis vetusta — 
description ' , 50 
distribution 50-51 
enemies 51 
injurious occurrence 47-49 
larva, description 50 
moth, description 50 
Portulaca oleracea — 
food plant of Hellula undalis 31 
food plant of Hymenia fascialis 2 
' : Powder gun, " use against sugar-beet web worm 66 
Purslane. (See Portulaca oleracea.) 
1 ' Pussley , " colloquial name for Portulaca oleracea 31 
Radish, food plant of Hellula undalis 24, 27, 30, 32 
' ' Radish, Japanese, " food plant of Hellula undalis 31 
Ragweed. (See Ambrosia.) 
Rape, food plant of Hellula undalis 24. 30 
Rhopalosiphum diantki damaging cabbage in Hawaii 33 
Rutabaga, food plant of Hellula undalis 30 
Salsola tragus, food plant of Loxostege sticticalis 59 
Scoparia alconalis, bibliographic reference 44 
Scoparia alconalis= Hellula undalis 28 
Screening a seed bed of cabbage in control of imported cabbage web worm 41, 42 
Shepherd's purse. (See Bursa [Capsella] bursa-pastoris.) 
P— 
and kerosene against imported cabbage web worm 42 
whale-oil, and arsenate of lead against horse-radish web worm 76 
whale-oil, and arsenate of lead against imported cabbage webworm 40 
whale-oil, and nicotine sulphate against aphides 40 
whale-oil, and nicotine sulphate against beet army worm 10 
whale-oil, and nicotine sulphate against common cabbage worm 10 
whale-oil, and nicotine sulphate against diamond-back moth 10 
