486 BIRDS FROM NICARAGUA AND COSTA RICA RICHMOND. 



35. Piogne chalybea (Gmel.)- 



Abundant. Xests in boles in trees standing in tbe pLantations, and 

 also conmion in tbe town of Blnetields, wbere tbe birds use natural 

 eavities in the breadfruit trees for nesting purposes. Young birds 

 found from April to July. Later, tbe birds octngregate in small flocks 

 and fly about over tbe plantations and bouses, occasionally circling 

 about bigb in tbe air during sunny days. At times large flocks, mixed 

 witb Tachiji-incia alhilinca, Vlu'Vidon crijfhrogdster, and otbers may be 

 seen flying al)out, esjiecially in tbe evening before sunset or on cloudy 

 afternoons. Tlie ordinary note resembles tbat of P. siibis. 



36. Chelidon erythrogaster (Btxkl.). 



Abundant in winter and during migrations. Arrive late in August, 

 wben tliey occur in large flocks, usually mixed witb otber species. In 

 Marcb large nund)ers were seen, probably migrating, and small num- 

 bers were seen as late as May 3. 



37. Tachycineta albilinea (Lawr.). 



Abundant, particularly on tbe Rio Frio, wbere tbere were many 

 snags and stumps sticking out of tbe water, in tbe cavities of wbicb 

 tbe birds bred. Saw young birds early in May. 



Tbis species seldom or never occurs away from tbe rivers, wbere it 

 flits back and fortb, frequently percbing on snags or dead limbs bang- 

 ing out over tbe water. 



38. Stelgidopteryx uropygialis (Lawr.). 



Common on tbe Kio Frio in company witb tbe preceding. 

 Collected by Wickbam on bis trip up tbe Escondido. 



Family VIREONID^. 



39. Vireo olivaceus (Liuu.). 



One of a pair secured September 10. 



40. Vireo philadelphicus (Cass.). 

 One sbot October 21 was tbe only one obsei'ved. 



41. Vireo flavifroiis \ifi 11. 



Rather coimnon; first se<Mi October 2'2 and last on February 8. 



42. Vireo ochraceus Sal v. 



A pair secured in sonn^ bu.sbes at (Ireytowii. February 1, and one 

 seen April 10, in tbe same vi<'inity. 



My ))irds are in fresb unwoiii plumage, and almost as bright as V. 

 carmioli. They agree very well with the description of tbe bird called 



