TWENTY-FIRST ANNUAL REPORT 117 



PART II, BY G. INNESS HARTLEY. 



XIX — Notes on the Development of the Jacana. 

 XX — Notes on the Development of the Ani. 

 XXI — Notes on a Few Emlaryos. 

 XXII — Nesting Habits of the Grey-breasted Martin. 

 XXIII — Development of the Wing in Birds. 

 XXIV — Notes on the Perai. 



PART III, BY PAUL G. HOWES. 



XXV — The Bees and Wasps of Bartica. 

 XXVI— Two Potter Wasps. 

 XXVII— Larval Sacrifice. 

 XXVIII— The Black Reed Wasp. 

 XXIX— The White-footed Wasp. 

 XXX— The Forest Shell Wasp. 

 XXXI— The One-banded Dauber. 

 XXXII— The Blue Huntress. 

 XXX Til — Paralyzed Provender. 

 XXXIV— Controlled Pupation. 



The richness of the small area of jungle in which we worked 

 in the vicinity of Bartica is attested by the fact that there occur 

 within its limits at least three hundred and fifty-one species of 

 birds ; quite 45 per cent, of the whole number recorded from the 

 entire Colony. We made notes on more than fifty species of 

 mammals, including all the more representative groups of South 

 America. These will be elaborated, added to and published at 

 the end of the ensuing year. A single Akawai Indian hunter 

 kept us supplied with excellent meat for many months from the 

 jungle immediately about the Station. Yet, at the end of our 

 stay, there seemed no diminution in the number of game birds 

 and animals, even a short distance away. 



Attention is particularly called to the many discoveries, 

 such as the eggs and young of toucans, the nestlings of various 

 birds such as the trumpeters, the photographing for the first 

 time of the quadrumanal habits of the hoatzin, and the no in- 

 considerable number of nests and eggs new to science. This 

 was all incidental, as the collecting of specimens is in no way a 

 primary object of the Station's work. Subjects of special study 

 were the tropical seasons and their effects on the broods of birds ; 



