56 NORTH AMERICAN THYSANOPTERA. 



Page. 



TUBULIPERA 11 



Ulmus montana var. pendula, food plant of Phloeothrips uzeli 32 



Umhellularia cali/ornica, food plant of Ankothrips robustus 21 



Thrips madronii 22 



Verbenas, food plants of Heliothrips hsemorrhoidalis 23 



Vetch, wild, food plant of Heliothrips hsemorrhoidalis 24 



Vines, pea, food plant of Heliothrips fasciatus 24 



food plants of Heliothrips hsemorrhoidalis 23 



Vitis {see also Grape). 



epp., food plants of Heliothrips femoralis 23 



Walnut, English, food plant of Euthrips pyri 26 



Weeds, food plants of Molothrips fasciatus 22 



Sericothrips apteris 24 



reticulatus 25 



stanfordii 25 



Wheat, food plant of jEolothrips fasciatus 22 



White fly, citrus. (See Aleyrodes citri.) 



wood, food plant of Euthrips insularis 27 



Willow (see also Salix fluviatilis) . 



black, food plant of Euthrips insularis 27 



stem, dead, Cryptothrips rectangularis taken in lepidopterous or coleop- 

 terous larval burrows 32 



Megalothrips (?) spinosus taken in lepidopterous or coleop- 

 terous larval burrows 34 



Yams, food plant of Euthrips insularis 27 



Yarrow, food plant of Euthrips minutus 27 



Yucca fllamentosa, food plant of Cephalothrips yuccse 31 



Zygothrips 13, 32 



longiceps 32 



o 



