INDEX. 57 



Thrips — Continued. Page. 



madronii in key to species 3 



magnus in key to species 3 



parasite, Thripoctemis russelli, means of colonization 51-52 



perplexus in key to species 4 



stage showing parasitism by Thripoctenvs russelli 30 



• tabaci, host of Thripoctenus russelli 30, 32, 37, 38, 39, 41, 43, 46, 48 



tabaci in key to species 4 



time between first indication of parasitism by Thripoctenus russelli and 



formation of parasite pupae under laboratory conditions 31 



Thysanoptera — 



an internal parasite, paper 25-52 



new, from California and Georgia, paper 1-24 



Trichothrips n. sp., not host of Thripoctenus russelli in experiments 43 



Triphleps insidiosus — 



enemy of Thripoctenus russelli 44 



in experiment with Thripoctemis russelli 43 



Turnips, Thripoctenus russelli found on foliage 48 



Willow galls, food of Cryptothrips salicis 21 



Winnemana 27 



o 



