1064 



^A^ INTRODUCTION TO ENTOMOLOGY 



White fly, citrus, 440; greenhouse, 439; 



maple, 440; strawberry, 440 

 White, gray-veined, 747 

 White-gn:.bs. 518 

 White marked tussock-moth, 680 

 White Mountain butterfly, 763 

 White-striped black, 667 

 Whites, the, 745 

 White- tipped moth, 676 

 Williams, F. X., 967, 969, 981 

 Williston, S. W., 852 

 Window-flies, 839 

 Window-winged moths, 653 

 Wings, 58; the development of, 182, 



195; specialization of, 212 

 Wings of the heart, 121, 162 

 Wing-veins, reduction of the number 



of, 65; the chief branches of the, 64; 



the increase of the number of, 68; 



the principal, 64 

 Winnertzia calciequina, 814 

 Wire-worms, 500 

 Witch-hazel cone-gall, 425 

 Witch-hazel-gall, the spiny, 426 

 Wohlfahrlia vigil, 871 

 Wollaston, 88 

 Wood-nymph, beautiful, 693; pearl, 



693 

 Workers, 1005 

 Wyeomyia smithii, 810 



Xenopsylla cheopis, 882 



Xenos vesparum, 549 



Xestobium rufovillosum, 515 



Xiphidium, 238 



Xiphosura, 8 



Xiphydria maculata, wings of, 900, 929 



Xiphydriidse, 890, 891, 899 

 Xoridini, 923 



Xyelids, 890, 891, 895, 896 

 Xylocelia (Diodontus), 985 

 Xylocopa virginica, <)'J2, 998 

 Xylomyia, 832; X. pallipes, 832 

 Xylomyiidas, 786, 788, 832 

 Xylophagidte, 786, 789, 833 

 Xylophagus, 833; wing of, 833 



Yellow, sleepy, 749 

 Yellow-bear, 703 

 Yellow-fever mosquito, 809 

 Yellow-jackets, 975, 977 

 Yellows, the, 748 

 Yponometita, 632; Y. padella, 632 

 Yponomeutidas, 582, 590, 591, 631 

 Yucca-borer, 734 

 Yucca-moths, 599; bogus, 600 



Zale lunata, 689 



Zebra, the, 764 



Zebra-caterpillar, 694, 695 



Zenodochiiim coccivorella, 629 



Zerene cccsonia, 749 



Zethinae, 966, 968 



Zethus, 968; Z. cyanopterus, 969; Z. 



lobtdatus, 969; Z. romandinus, 969; 



Z. slossonce, 968; Z. spinipes, 968 

 Zeiizera pyrina, 603 

 Zeuzerinas, 603 

 Zophodia grossularice, 652 

 Zoraptera, 215, 270 

 Zorotypidae, 270 

 Zorotypus, 270; Z. huhbardi, 271; Z. 



snyderi, 271, 272 

 Zygoptera, 321 



