XX ILLUSTRATIONS 



Fig. 116. Diagram^ Wing Development of Black-necked 



Toucan 348 



117. Diagram, Wing Development of American Catbird 349 



118. Diagram of Hand Development of the Hoatzin 354 



119. Diagram, Hand Development of Guiana Kiskadee 355 



120. Diagram, Hand Development of Black-necked 



Toucan 356 



121. Diagram, Hand Development of Grey-breasted 



Martin 357 



122. Head of the Perai 360 



" 123. The Perai 362 



124. Chart of Rainfall as Correlated with the Nest- 



inct of Wasps and Bees in Bartica District 372 



125. Life Histories of Bartica Wasps. Color Plate, facing 376 



126. Buff Eumenes Resting on Her Nest 378 



127. Detailed Views of Earthen Jugs Made by the Red 



Eumenes 380 



128. Nest of Buff Eumenes, Showing Finished Cells 



and One Open for Storing 382 



129. Jugs of Red Eumenes Opened to Show Contents 384 



130. Roach-killer Showing Gradual Transformation 



OF Larva to Pupa 388 



131. PiTPA OF the Roach-killer just after the Trans- 



formation FROM the Larva 388 



" 132. Black Reed Wasp 395 



133. Life Histories of Bartica Wasps. Color Plate, facing 401 



134. Cocoon of White-footed Wasp, Showing Its Elab- 



orate Construction 406 



135. The Forest Shell Wasp 408 



136. One-banded Dauber 416 



137. Blue Huntress at her Nest 426 



138. Spider Removed from Cell of the Blue Huntress 



Showing Egg in Position on Victim's Abdomen 428 



139. Cell of the Blue Huntress, Opened to Show 



Cocoon 432 



140. Pupa of the Blue Huntress Showing Folded Legs 



and Abdominal Buttresses, Which Prevent In- 

 jury against the Sides of the Cocoon 434 



141. Vermillion Nut Opened to Show Imprisoned Lar- 



vae of Vermillion Nut Fly 446 



" 142. The Hinterland of British Guiana Lying on the 



Upper Rapo-nunni River. (Map) 452 



" 143. Caladium Beenas or Indian Charms. Color Plate, 



facing 488 



