CONTENTS xi 



PAGES 

 PHCEBe's biography — THE DEATH OF THE YELLOW WARBLER — THE 

 RED squirrel's FROLICS — • SOME VISITORS TO THE WALNUT TREE — ■ 

 BIRDTIME REFLECTIONS — THE BIRD OF TWILIGHT -OR NIGHT HAWK — A 



TRAGEDY IN THE DUNES STRANGE MISHAPS TO BIRDS THE TOAD's 



SOCIAL UFE THE BIRD THERMOMETER OR INDIGO BIRD THE CHE- 

 WINK. TAKING SPIZELLA's PORTRAIT 166-467 



VII. GENERAL OBSERVATIONS AND SKETCHES AFIELD, 



WITH EXAMPLES 



WALKS AFIELD AS AN AID TO INTERPRETATION OF NATURE RESULTS 



OF OBSERVATION THE FORMULATION OF PROBLEMS SEASONAL DI- 

 MORPHISM CASES OF ORIGIN BY ADAPTATION IN NATURE VARIANTS 



MUTANTS ECADS MEADOW ECHOES THE POND THE BROOK 



INHABITANTS NATURE'S LABORATORY ANIMAL LIFE IN RAINT 



WEATHER PASTURE AND MEADOW INSECTS — THE UNDER-LEAF 



INHABITANTS THE SAND DUNES NIGHT INSECT VISITORS TO OUR 



DOORWAY THE BUMBLEBEES' NIGHT CAMP THE BIRDS AND 



squirrels' ASSEMBLAGE GROUND THE HERMIT THRUSH AS A SELEC- 

 TIVE FACTOR • 269-314 



VIII. ECOLOGY — INTERPRETATION- OF ENVIRONMENT AS 



EXEMPLIFIED IN THE ORTHOPTERA 



SOURCES OF LIFE AFTER GLACIATION HABITATS OF PLANTS AND ANIMAIfl 



BASE LEVELLING AND SUCCESSIONS OF PLANTS AND ANIMALS ZOO- 

 GEOGRAPHY nature's RECLAMATION OF STERILE GROUND THE 



HABITAT OF THE ORTHOPTERA THE TEXAN KATYDID THE HOME OP 



THE FORKED-TAIL KATYDID AND ITS ALLIES THE-SWOHDBBAREH THE 



CAROLINA LOCUST- — THE SPRINKLED LOCUST THE VARIED- WING LOCUST 



BLATCHLEy's LOCUST — THE TWO-STRIPED LOCUST AND ITS RELATED 



SPECIES — THE LONG-HORNED LOCUST — THE MOTTLED SAND LOCUST — 

 boll's locust — THE, CLEAR-WING LOCUST — THE LEATHER-COLORED 



LOCUST THE SHORT-WING BROWN LOCUST THE CLOUDED LOCUST 



THE DRINK OF THE GRASSHOPPERS THE MOLE CRICKET THE 



HABITS OF THE STRIPED MEADOW CRICKETS SOME HABITS OP FIELD 



CRICKETS KATYDIDS IN THEIR NIGHT RESORTS — THE SHORT-WINGED 



GREEN LOCUST — THE QUAKER LOCUST — THE PASTURE LOCUST — THE 

 SHORT-HORNED LOCUST THE GKEBN-LEGGED LOCUST THE GREEN- 

 STRIPED LOCUST THE GROUSE LOCUSTS THE LESSER LOCUST THE 



PENNSYLVANIA COCKROACH CLASSIFIED HABITATS OF VARIOUS SPECIES 



OF ORTHOPTERA BASED ON THEIR EGG-LAYING SITES, SHOWING THEIR 

 RELATION TO PLANT FORMATIONS IN GENERAL DEFINITIONS OF COM- 

 MON ENVIRONMENTAL COMPLEXES AND VARIOUS HABITATS OF PLANTS 

 GROUPED UNDER FORMATIONS 315-433 



INDEX 435 



