392 bulletin: museum of comparative zoology. 



7. Pachyrhamphus polychopterus similis Cherrie. 



Pachyrhamphus si7nilis Cherrie, Proc. U. S. N. M., 1891, 14, p. 343 (Greytown, 

 Nicaragua). Types.— U. S. N. M. {d" and 9). 



SuBSPECiFic CHARACTERS. — Very similar to Pachyrhamphus polychopterus 

 costaricensis Chubb of Costa Rica, and of about the same size, perhaps slightly 

 smaller; under parts averaging a little darker and less pearly gray. Very 

 similar in the color of the under parts to P. p. cinereiventris, but smaller. 



Measurements. — ^Male (five specimens) — wing, 71.0-71.4 (70.1); 

 tail, 52.1-57.0 (55.2); tarsus, 17.5-19.2 (18.3); exposed eulmen, 12.5- 

 12.8 (12.6). 



Female (three specimens) — wing, 69.5-70.5 (70.0) ; tail 52.5-55.0 

 (53.8); tarsus, 18.5-18.8 (18.7); exposed eulmen, 11.5-13.5 (12.3). 



Range. — Costa Rica (Atlantic side), Nicaragua, Honduras. 



Specimens examined. — Costa Rica: Guayabo, 1 9; Jimenez, 

 2 9 9. Nicaragua: Greytown, 2 cf cf, 1 9 ; Sucuya, 1 c/'; Escon- 

 dido riv., 1 cf ; Juan Venas, 1 cf. Hondur&,s: Sta. Ana, 1 cf. 

 Total, 10. 



Remarks. — This form is exceedingly close to P. p. costaricensis 

 and only distinguishable in series. We have a strong feeling that the 

 two will eventually prove to be inseparable, when a larger series of 

 P. p. similis shall become available for comparison. 



8. Pachyrhamphus polychopterus dorsalis Sclater. 



Pachyrhamphus dorsalis Sclater, Cat. Amer. birds, 1862, p. 243 ("Bogotd?")- 

 Type. — British Museum, Sclater collection, examined by Hellmayr who 

 pronounced it an undoubted Bogotd skin. — • Cf. Proc. Zool. soc. London, 

 1911, p. 1143. 



Pachyrhamphus chapmani Chubb, Bull. Brit. orn. club, 1920, 40, p. 74 (Sta. 

 Elena, Antioquia, Colombia). Type. — British Museum, Salvin-Godman 

 collection. 



SuBSPECiFic CHARACTERS. — Similar to Pachyrhamphus polychopterus tristis 

 (Kaup), but larger; under parts much paler gray; hind neck sometimes 

 showing a gray collar separating the black of the pileum from that of the back. 



Measurements. — Male (ten specimens) — wing, 74.0-80.5 (77.9) ; 

 tail, 55.5-60.0 (57.5); tarsus, 18.0-20.0 (19.0); exposed eulmen, 

 12.0-14.5 (12.9). 



