Platk III. 



Fig. 1. Hyoid of Flicker {Colaptca auraim) (adult, X 2). 



2. Hyoid of Flicker (Colaptes auratus) (recently hatched, X 2). 



3. Hyoid of Red-naped Sapsncker (Sphyrapicus var'nis vuchalis) (X 2). 



4. Tongue of recently hatched Downy Woodpecker {Dryohates puhescens) 



(X4). 



5. Tongue of fully-fledged nestling of Downy Woodpecker {Dryobaies puhes- 



cens) (X 3i). 



6. Tip of tongue of fuUy-lledged nestling of Downy Woodpecker (Dryobates 



jyithescens) (x 6). 



7. Tip of tongue of adult Downy Woodpecker (Dryobates pubescens) (x 6}). 



8. Spines from dorsal tract nf tongue of Ked-hoaded Woodpecker (Melanerpes 



ei-ythrocephaluH) (greatly <'nlargc<l). 



9. Spines from dorsal tract of tongue of Ladder-back Woodpecker (Dryo- 



bates scalaris) (greatly enlarged). 



44 



