ILLUSTRATIONS 



PAoa 



THE BURROW OP ATJGOCHLORA 168 



MALE AND FEMALE CARPENTER BEE {XYLOCOPA VIRGINICa) . . 174 



DOUBLE BURROW OP CARPENTER BEE 176 



BURROW OP CARPENTER BEE, WITH PARTITIONS, BEE HEAD, AND 



ONE LARVA IN SITE 178 



THE FIRST ATTITUDE OF FLIGHT 184 



BALLOONING SPIDERS IN THE ACT OP PLIGHT 187 



A SPIDER ISSUING TRIAL THREADS PROM A FOOT-BASKET . . 190 



THE ORBWEAVER's BALLOON 192 



GATHERING IN THE BUOYING LINES 195 



A BALTIMORE ORIOLE AND ITS NEST 198 



A VIREO'S NEST, WOVEN AND BOUND WITH GATHERED SPIDER 



SILK 199 



A TAILOR BIRD AND ITS NEST 200 



LEAP-WOVEN TENT OF A SPIDER (epEIRA TRIFOLIUm) .... 201 

 AN ORBWEAVING SPIDER's NESTING-TENT OF FERN-LEAVES 



SEWED TOGETHER 203 



NESTING-TENT OF A SPIDER ON LAUREL-LEAVES 204 



A BABY spider's SILKEN TENT AND CRADLE 206 • 



THE SILK-WOVEN HOME AND COCOON NEST OP A SALTIGRADE 



SPIDER 208 



A COMMUNITY OP SOCIAL SPIDERS IN THEIR SILK-BOUND NEST 



OP LEAVES. AFTER M. EUGENE SIMON 210 



EGG-CELLS OP BLUE MUD-DAUBER ^A.iiV {CHALYBION C^RULEUm) 213 

 BLUE MUD-DAUBER WASP CARRYING OFF AN ORBWEAVING 



SPIDER FROM ITS WEB 215 



PIPES-OF-PAN CLAY CELLS OP MUD-DAUBER WASP OCCUPIED BY 



A GUEST WASP 217 



WOOD-PULP NEST OF VESPA MACULATA, OUR COMMON HORNET 219 

 A TRAP-DOOR SPIDER {CTENIZA CALIFORNICa) PURSUED BY A 



TARANTULA-KILLER {pEPSIS FORMOSA) 221 



I AND 3. CALIFORNIA TRAP-DOOR SPIDER's NEST {CTENIZA CALI- 



FORNICa). 2. TURRET TRAP-DOOR NEST {bOLICHOSCAPTUS 



LATASTBl). AFTER M. EUGENE SIMON 224 



THE POUR-SPOTTED ELIS DRAGGING LYCOSA TIGRINA FROM ITS 



BURROW 226 



THE SEVENTEEN-YEAR CICADA AND ITS PUPA-CASE .... 229 



A STUDY IN IDENTIFICATION 231 



CICADA CITY OP MUD HUTS, OR TURRETS 233 



A CICADA TURRET 235 



SECTIONAL VIEW OP CICADA HUT AND BURROW 236 



EGG-TRENCHES IN TWIGS, MADE BY FEMALE CICADA . . . 238 



FORMS OP THE CICADA ISSUING FROM THE PUPA-CASE . . . 239 



ix 



