XIV 



LIST OF ILLUSTRATIONS 



PAGE 



Insect Visitors to the Milkweed 

 (Asclepias cornuti). The in- 

 sects are the red-spotted bee- 

 tles ( Tetraopes tetraophthal- 

 mus) . Colored plate ..... 36 

 Swamp Milkweed (Asclepias 



incarnata) . . . 37 



The Butterfly Milkweed, Golden- 

 rod, and Insect Guests. Initial 



draining 40 



Ruby-throated Humming-bird. 



Initial draimng 42 



Bill, Head, and Feathers of Ruby- 

 throated Humming-bird, show- 

 ing how pollen of plants is 



carried 45 



Male Ruby-throated Humming- 

 bird {Trochilus colubris) ... 48 

 Spiny Galls on Witch-hazel, and 



Plant Lice. Initial drawing . 49 

 Spiny Gall on Witch-hazel, show- 

 ing the gall-producing aphid 

 {Hamamelistes spinosus) in the 

 act of leaving the gall. . . 51 

 Wild Bergamot (Monarda fistu- 

 hsa) and its little yellow but- 

 terfly visitor, Terrias liaa . 55 

 Troilus Butterfly visiting the 

 Cardinal Flower {Lobelia car- 



dinalis) 57 



Moth ( Telea polyphemus) .... 60 

 Polyphemus Caterpillar on bass- 

 wood in contracted attitude . . 61 

 Protective resemblance in the 

 Snout Butterfly (Libythea hack- 



manni) 64 



Tree Toad {Hyla versicolor) ... 73 

 Male Walking-stick (Diaphero- 



mera femorata) 77 



Leaves of Red Oak, showing 

 Walking-stick protected by its 

 resemblance to veins of the 

 leaf, and Round-wing Katydid, 

 almost invisible against leaf 



background 79 



Wild Gooseberry Branch showing 



PAGE 



young green Walking-sticks 

 (Diapheromera femorata) on 

 the upper surface of the leaves . 81 



Dune landscape, showing habitat 

 of Orange-tipped Butterfly. 

 Initial drawing 83 



Orange-tipped Butterfly {An- 

 thocharis genutia), resting on 

 flowers of Arabis lyrata. Col- 

 ored plate 84 



Datana Moth. Initial drawing. 86 



Two Moths {Datana contracta) . 87 



Moth {Datana angussi) viewed 

 from above, showing markings 

 in simulation of a dried, 

 rolled leaf 89 



Datana Caterpillars grouped at 

 the top of a branch in sim- 

 ulation of a flower 91 



Geometrid Moth. Initial drauing 93 



Acontia and Stenoma Moths. 

 Initial drawing 94 



Geometrid Larva on twig of 

 Sassafras 95 



Moth {Aco\itia erastriodes) and 

 bird excijetnent which it re- 

 sembles 96 



Moth {Stenoma schlaegeri) on 

 upper surface of Strawberry 

 Leaf . 97 



Catocala Larva blending with the 

 color of a twig. I nitial drawing 99 



Weevil on Oak Bark. Initial 

 photograph by C. T. Hills . . 101 



Thread-legged Bug and Walking- 

 stick. Initial photographs . . 105 



Bumble Flower Beetles and Oak 

 Trees. Initial drawing ... 107 



Bumble Flower Beetle and 

 Bumblebee 109 



Schizura jCaterpillar. Initial 

 photograph 110 



Case of protective resemblance 

 both in form and color — the 

 caterpillar Schizura ipomem 

 feeding dn dogwood leaf . . . Ill 



