U. S. NATIONAL MUSEUM 



BULLETIN NO. 50, PART 3, PL. XVIII 



I. THRYOTHORUS ludovicianus. 



2. THRYOMANES bewickii. 



W^>s, 188562 _ 



3. TROGLODYTES aedon. 





4. THRYORCHILUS browni. 



31045,$ 



5. OLBIORCHILUS hiemalis. 



6. THRYOPHILUS rufalbus. 



8. HENICORHINA prostheleuca. 



7. NANNORCHILUS leucogaster. 



