TWO-COMPARTMENT NEST 



173 



steps into the front section, toward tiie light, entering the screen 

 door, and remains there until released. There is little danger 

 of her trampling on the egg she has just laid, or soiling or dis- 



S®rH 



:r 



^ 



jt(a.CAIUM1CC 



"PuBti tUTTOn 





-.^y^fata 



— ^'ntjw uMLBtoM. cum* "'^ 



Front view. 



^^ \^ tOTTOM q>^ MCST D MMft /^ 

 CLOTH WITH 3TB.IP3 ttT ^ 



nouLDiriG TO eino n 



Cross-section. 



(California Experiment Station) 



Fig. 121. — Plans for a two-compartment trap nest. 



turbing the nesting material. Dry manure collecting on the 

 treadle is easily scraped off with a putty knife or similar imple- 

 ment, and allowed to fall through the open bottom. 



At the Maine Station these nests are arranged in tiers and 



