XX ILLLSTRATIONS 



Fig. IK). Diagram, Wing Development of Black-necked 



Tore AN 3i8 



117. Diagram, \\'ing Development of American Catbird 3i9 



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 



li-'l. Diagram, Hand Development of Grey-breasted 



]Martin 357 



" 122. Head of the Perai 3G0 



" 123. The Perai 3G2 



" 121. Chart of Rainfall as Correlated mitii the Nest- 

 ing OF Wasps and Bees in Bartica District 372 



125. Life Histories of Bartica ^^'ASPS. Color Plate, facing 376 



" 126. JiuFF Iu'menes 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. R()A{ h-killer Showing Gradual Transformation 



OF I>arva to Pupa 388 



131. Pupa 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 Poorest 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 



1 10. Pupa of the Blue Huntress Showing Folded Legs 

 AND Abdominal Buttresses, Which Prevent In- 



.U'RY AGAINST THE SiDES OF THE CoCOON 434 



141. ^'ERMILLION Nut Opened to Show Imprisoned Lar- 

 vae OF Vermillion Nut Fly 446 



1 1-2. The Hinterland of British Guiana Lying on the 



L'l'PER Rapo-nunni River. (Map) 452 



1 13. Caladium Beenas or Indian Charms. Color Plate, 



facing 488 



