36. 



Bangs, Collection of Birds from Chiriqui 



TAuk 

 LOct. 



Mionectes assimilis dyscolus,' subsp. nov. 



Six specimens, botli sexes, Divala, October, November and December. 



7j'/e. — Divala, Chiriqui, adult ?, No. 795S, Coll. of E. A. & O. Bangs. 

 Collected Dec. 6, 1900, by W. W. Brown, Jr. 



Characters. — Slightly smaller than true M. assi?nilis ; bill smaller; 

 throat less graj; color of underparts more greenish, less buff. 



Colors. — Sexes alike; whole upper parts, including edges of wing 

 feathers and upper surface of tail, olive-green ; no wing bars (at least in 

 the adult plumage); tcrtials tipped with pale oil green ; chin greenish 

 gray gradually becoming dull olive-green on breast; middle of belly and 

 under tail-coverts huffy olive-yellow; sides and flanks darker, more 

 shaded with olive-green ; bend of wing olive-yellow; lining of wing buff- 

 yellow ; wing feathers, except the outer margins, dusky; bill (in dried 

 specimens) blackish, basal part of lower mandible paler-horn color. 



Measurements (in millimeters). 



Remarks. — I have already expressed my belief that Mionectes oleagin- 

 eus and M. assimilis are distinct species. The more specimens I examine 

 the more convinced am I that this is so. True M. oleagineus of northern 

 South America is a very different bird from true M. assimilis of southern 

 Mexico and Guatemala, and the two forms that come from regions near- 

 est together — M. oleagineus parens of Panama, and M. assimilis dyscolus 

 of Chiriqui — show no sign of intergrading, but are quite as distinct as 

 are the two typical forms. 



Ornithion pusillum {Cab. it Heine). — One $, Divala, November 7. 



Tyranniscus parvus Laxvr. — Two specimens, ^ and $, Divala, 

 November. 



Tyrannulus reguloides Ridgzv. — One adult $, Divala, November 20. 

 This specimen agrees exactly with the type of T. reguloides, from the 

 lower Amazon and is very different from T. elatus of Guiana and Colom- 

 bia. It is rather strange that the Chiriqui bird should prove to belong 



' Dyscolus, of a bad temper, peevish. 



