LIST OF TEXT ILLUSTRATIONS 



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5' 



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1 1. 



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*3- 



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"5- 



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i-7- 



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18. 



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23- 



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*7- 



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32- 



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33- 



Head and tongue of worker bee . . . 4 



Heads of queen and drone .... 5 



Queen cells and worker brood of honey bee . 7 



Queen of the common honey bee ... 7 



Legs of different bees 8 



Legs of different bees 9 



Sphecius speciosus carrying Cicada to its burrow 23 



Adult Cicada bearing eggs of Sphecius . . 2} 



Larva of digger wasp in Cicada burrow . . 24 



Same, spinning its cocoon .... 24 



Immature stages of the digger wasp . . 24 



Cocoon of same 25 



Polistes pallipes 25 



Polistes rubiginosus .26 



Odynerus flavipes and its nest in a spool . . 31 



Tiphia inornata 31 



Chrysis sp. 31 



Laelius trogodermatis 35 



Goniozus sp. parasitic on larvae of codling moth 36 



Solenopsis xyloni 37 



Crematogaster lineolata ..... 38 



Monomorium minutum ..... 39 



Tetramorium caespitum 40 



Ants at play 46 



Pelecinus polyturator . . . ... 50 



Baeus americanus 51 



Cynips spongifica . . . . . . 53 



Diastrophus nebulosus 54 



Pachyneuron micans 56 



Chalcis ovata 57 



Larvae of Euplectrus comstockii ... 58 



Pupae of same 58 



