\\V PREFACE 



iiii^ visitors, invest these wonderful regions. It will, I hope, 

 sn})i)lenient and add to the value of museum zoological work, 

 just as this tro])ical field research must, in turn, rest upon a 

 (iiiii roiiiidatioii of hiboratory investigation. I desire that 

 this \()hiine he considered as the joint contribution of Inness 

 Ilartlev, Paul Howes and mvself. 



In detail, 31r. Hartley's researches have been concerned 

 chiefly with the gathering of ornithological data and with 

 problems of embryology, while ISlr. Howes has confined his 

 \\()rk to entomology. The photographic illustrations are 

 from negatives taken by JNIr. Howes and myself. For the 

 pastel of two trumpeter chicks I am indebted to Miss Persis 

 Ivirmse. 



William Beebe. 



Kalacoon House, 



Hills Estate, 



jNIazariini Uiver, 



13ritisli (iuiana. 



August 10, 1916. 



